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2009 IECC: Advanced

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The 2009 International Energy Conservation Code
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2009 IECC: Advanced

  1. 1. Energy Code Workshop – Level 201 Commercial Provisions of the 2009 IECCInstructor – Anthony C. Floyd, AIA, ICC Certified Professional, LEED AP
  2. 2. Workshop Outline • Scope and Application • Mandatory and Prescriptive Path Provisions • Performance Path • ASHRAE 90.1 Compliance Option • Existing Buildings and Renovations • Case Study and Exercise • 2012 IECC, IgCC, ASHRAE 189.1 and other codes/standards on the horizon
  3. 3. International Energy Conservation Code ASHRAE Standard 90.1 International Green Construction Code Building Energy Codes
  4. 4. Structure of IECC Chapter 1 Administrative Chapter 2 Definitions Chapter 3 Climate Zones Chapter 4 Residential Energy Efficiency Chapter 5 Commercial Energy Efficiency Chapter 6 Referenced Standards
  5. 5. • Scope and Application – Section 501 - General • Mandatory and Prescriptive Path Provisions – Section 502 - Building Envelope – Section 503 - Mechanical Systems – Section 504 - Service Water Heating – Section 505 - Electrical Power and Lighting • Performance Path – Section 506 - Building Performance Path IECC Chapter 5
  6. 6. Baseline: IECC and ASHRAE 90.1 Both IECC and ASHRAE 90.1 apply, ASHRAE 90.1 likely used Both IECC and ASHRAE 90.1 apply, either used to comply IECC applies
  7. 7. General Requirements Climate Zones Figure 301.1
  8. 8. General Requirements Arizona Climate Zones
  9. 9. Commercial Compliance Process Section 501.2 Application requires 90.1 to be used in its entirety (Envelope, Lighting, Mechanical) if used as an alternate compliance path Must the Project Comply with the IECC? Comply with the Envelope Requirements Comply with the Mechanical/SWH Requirements Comply with the Lighting Requirements Section 502 90.1 Section 5 Sections 503 and 504 90.1 Section 6 Section 505 90.1 Section 9 Document Compliance with the IECC Plan Review Inspection
  10. 10. • Scope and Application – Section 501 - General • Mandatory & Prescriptive Path Provisions – Section 502 - Building Envelope – Section 503 - Mechanical Systems – Section 504 - Service Water Heating – Section 505 - Electrical Power and Lighting • Performance Path – Section 506 - Building Performance Path IECC Chapter 5
  11. 11. Commercial Compliance Options What are my Options for Complying with the IECC? Chapter 5 of the IECC General Prescriptive Approach  Use for ≤ 40% of gross wall area in vertical fenestration  Use for ≤ 3% of gross roof area in skylights OR Section 506 Total Building Performance Approach 502 & 506
  12. 12. • Roof/Ceiling Assemblies • Wall Assemblies • Below Grade Walls • Floor Assemblies over unconditioned space • Slab Edge • Vertical Fenestration and Skylights Building Thermal Envelope
  13. 13. Tables separated by occupancy type  Group R occupancies use “Group R” high rise column  Non-Group R occupancies use “All other” column Tables 502.1. & 502.1.2(1) Building Thermal Envelope
  14. 14.  Window and door assemblies  Curtain wall, storefront glazing & commercial entrance doors  Sealing of the building envelope  Outdoor air intakes and exhaust openings  Loading dock weather-seals  Vestibules  Recessed lighting 502.4 Building Thermal Envelope Mandatory: Air Leakage
  15. 15. All penetrations, openings, joints and seams in the building envelope must be sealed. Materials that can be used include:  Caulking  Gasketing  Tapes  Moisture vapor-permeable wrapping material Sealing materials spanning joints between dissimilar materials must allow for expansion and contraction Photo courtesy of Ken Baker, K energy 502.4.3 Building Thermal Envelope Mandatory: Air Leakage
  16. 16. Buildings ≥ 3 stories in height above grade  Class 1 motorized leakage- rated damper – Maximum leakage rate ≤ 4cfm /ft2 @ 1.0 inch w.g. Buildings < 3 stories in height  Gravity (non-motorized) allowed 502.4.5 Building Thermal Envelope Mandatory: Outdoor Air Intakes & Exhaust Openings
  17. 17. Equip cargo doors and loading dock doors with weatherseals Goal is to restrict infiltration 502.4.6 Building Thermal Envelope Mandatory: Weatherseals
  18. 18. All recessed luminaires installed in the building envelope  Type IC rated and sealed with gasket or caulk between housing and interior wall or ceiling covering  Type IC rated and labeled in accordance with ASTM E 283 to allow ≤ 2.0 cfm of air movement from conditioned space to ceiling cavity 502.4.8 Building Thermal Envelope Mandatory: Recessed Lighting
  19. 19. Table 502.1.2 Building Thermal Envelope Prescriptive
  20. 20. Building Thermal Envelope Prescriptive: Opaque Elements and Assemblies 502.1.2 (U-Factor); 502.2.2(1) and (2) (R-Value)
  21. 21. Roof R-values and U-factor requirements are based on assembly type / insulation placement  Insulation entirely above deck  Metal buildings  Attic and other 502.1.2 (U-Factor); 502.2.2(1) and (2) (R-Value) Building Thermal Envelope Prescriptive: Roof R-Value and U-Factor
  22. 22. Climate Zone 1 2 3 4 Except Marine 5 And Marine 4 6 7 8 Insulation entirely above deck R- 15ci R- 20ci R- 20ci R- 20ci R- 20ci R- 20ci R- 20ci R- 20ci R- 20ci R- 20ci R- 20ci R- 20ci R- 25ci R- 25ci R- 25ci R- 25ci Metal buildings (with R-5 thermal blocks) R-19 R-19 R- 13+ R-13 R- 13+ R-13 R- 13+ R-13 R-19 R- 13+ R-13 R-19 R- 13+ R-13 R-19 R- 13+ R-19 R-19 R- 13+ R-19 R- 19+ R-19 R- 11+ R-19 R- 19+ R-10 Attic and other R-30 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-49 R-49 ROOFS Table 502.2(1) Building Thermal Envelope R-Value: Roof Insulation
  23. 23. Dropped CeilingDropped Ceiling Insulation placed on Suspended Ceiling with Removable Ceiling Tiles  Will not count for code compliance  Will not comply with Section 502.4.3 – “Sealing of the building envelope” 502.2.1 Building Thermal Envelope R-Value: Roof Insulation
  24. 24. Climate Zone 1 2 3 4 Except Marine 5 And Marine 4 6 7 8 Mass NR R- 5.7ci R- 5.7ci R- 7.6ci R- 7.6ci R- 9.5ci R- 9.5ci R- 11.4ci R- 20ci R- 13.3ci R- 13.3ci R- 15.2ci R- 15.2ci R- 15.2ci R- 25ci R- 25ci Metal building R- 16 R-16 R-16 R-16 R-19 R-19 R-19 R-19 R- 13+ 5.6ci R-13+ 5.6ci R-13+ 5.6ci R-13+ 5.6CI R-19+ 5.6CI R-19+ 5.6CI R- 19+ 5.6CI R- 19+ 5.6CI Metal Framed R- 13 R-13 R-13+ 7.5ci R-13+ 7.5ci R-13+ 3.8ci R-13+ 7.5ci R-13+ 7.5ci R-13+ 7.5ci R- 13+ 7.5ci R-13+ 7.5ci R-13+ 7.5ci R-13+ 7.;5ci R-13+ 7.5cfi R-13+ 15.6ci R- 13+ 7.5ci R- 13+ 18.8c i Wood Framed & Other R- 13 R-13 R-13 R-13 R-13 R-13 R-13 R-13= 3.8ci R- 13+ 3.8ci R-13+ 3.8ci R-13+ 7.5ci R-13+ 7.5ci R-13+ 7.5ci R-13+ 7.5ci R- 13+ 15.6c i R- 13+ 15.6c i WALLS, ABOVE GRADE Table 502.2(1) Building Thermal Envelope R-Value: Wall Insulation
  25. 25. Walls weighing at least 35 lbs/ft2 of wall surface area OR 25 lbs/ft2 of wall surface area if material weight is ≤ 120 lb/ft3 502.2.3, Table 502.2(1) Building Thermal Envelope Mass Walls
  26. 26. Climate Zones 1 (Group R) and 2 (all other) – Can use integral insulation instead of R-5.7 ci  Concrete block walls must comply with ASTM C 90, and  Ungrouted or partially grouted @ 32 inch. o.c. or less vertically or 48 inch. o.c. or less horizontally, and  Ungrouted cells must be filled with insulation material ≤ of 0.44 Btu-in./h-ft2 F Climate Zone 1 “all other”  No insulation required for mass walls Table 502.2(1) Building Thermal Envelope Mass Walls: Concrete Masonry Units
  27. 27. Climate Zone R-Value 1-2 R-16 3-4 except Marine R-19 Marine 4-6 R-13+R-5.6ci 7-8 R-19+R-5.6ci Table 502.2(2) Building Thermal Envelope Metal Building Walls
  28. 28.  Cavity insulation or cavity plus continuous (ci)  Continuous insulation not broken up by framing members e.g. rigid board insulation Table 502.2(1) Building Thermal Envelope Wood, Metal, Frame and Other Walls
  29. 29. Joist/Framing (Steel/Wood)  Insulation installed between framing Mass Floors  Materials weighing (of floor surface area) 35 lbs/ft2, or  25 lbs/ft2 if material weight is ≤ 12 lbs/ft3  Insulation installed continuously Steel Floor Joist Systems (footnoted to Table 502.2(1))  R-38 in Climate Zones 6-8502.2.5 Building Thermal Envelope Floors over Unconditioned Space
  30. 30. Climate Zone 1 2 3 4 Except Marine 5 And Marine 4 6 7 8 Mass NR NR R- 6.3ci R- 8.3ci R- 6.3ci R- 8.3ci R- 10ci R- 10.4ci R- 10ci R- 12.5ci R- 12.5ci R- 14.6ci R- 15ci R- 16.7ci R- 15ci R- 16.7ci Joist/ Framing Steel/ (Wood) NR NR R-19 R-30 R-19 R-30 R-30 R-30 R-30 R-30 R-30 R-30 R-30 R-30 R-30 R-30 Table 502.2(1), 502.2.5 FLOORS Building Thermal Envelope Floors over Unconditioned Space
  31. 31. Climate Zone 1 2 3 4 Except Marine 5 And Marine 4 6 7 8 Unheated Slabs NR NR NR NR NR NR NR R-10 for 24 in. below NR R-10 for 24 in. below R-10 for 24 in. below R-15 for 24 in. below R-15 for 24. in. below R-15 for 24 in. below R-15 for 24 in. below R-20 for 24 in. below Heated Slabs R-7.5 for 12 in. below R-7.5 for 12 in. below R-7.5 for 12 in. below R-7.5 for 12 in. below R-10 for 24 in below R-10 for 24 in. below R-15 for 24 in. below R-15 for 24 in. below R-15 for 24 in. below R-15 for 24 in. below R-15 for 24 in. below R-20 for 48 in. below R-20 for 24 in. below R-20 for 48 in. below R-20 for 48 in. below R-20 for 48 in. below SLAB-ON GRADE FLOORS Table 502.2(1), 502.2.6 Building Thermal Envelope Slab-on-Grade
  32. 32. Unheated slab – insulation required:  “All Other” in Climate Zones 6-8  “Group R” in Climate Zones 4-8 Heated slabs – insulation required in all Climate Zones 502.2.6 Building Thermal Envelope Slab-on-Grade
  33. 33. Climate Zone 1 2 3 4 Except Marine 5 And Marine 4 6 7 8 Swinging U- 0.70 U- 0.70 U- 0.70 U- 0.70 U- 0.70 U- 0.70 U- 0.70 U- 0.70 U- 0.70 U- 0.70 U- 0.70 U- 0.50 U- 0.50 U- 0.50 U- 0.50 U- 0.50 Roll-Up Or Sliding U- 1.45 U- 1.45 U- 1.45 U- 1.45 U- 1.45 U- 1.45 U- 0.50 U- 0.50 U- 0.50 U- 0.50 U- 0.50 U- 0.50 U- 0.50 U- 0.50 U- 0.50 U- 0.50 Table 502.2(1), 502.2.7 OPAQUE DOORS Building Thermal Envelope Opaque Doors
  34. 34. Table 502.3, 502.3 Building Thermal Envelope Prescriptive: Fenestration
  35. 35. Percentage of Vertical Fenestration Area to Gross Wall Area  Allowed up to 40% maximum of above grade wall 502.3.1 – Prescriptive (Max Area) Building Thermal Envelope Prescriptive: Maximum Vertical Fenestration
  36. 36. Based on above-grade wall area (gross)  Includes walls between conditioned space and unconditioned space or the great outdoors • Includes walls that are > 15% above grade Total fenestration area (includes frame and glazing)  Does not include opaque door area 502.3.1 Building Thermal Envelope Vertical Fenestration
  37. 37. Two Options for Meeting the SHGC Requirements  Fenestration product rated and labeled to NFRC 200, or  Select default from Table 303.1.3(3) Table 303.1.3(3) Building Thermal Envelope Fenestration SHGC Requirements
  38. 38. The Effect of Overhangs on Fenestration SHGC  Overhangs allow a higher SHGC product to be installed  Projection factor must be calculated 502.3.2 Building Thermal Envelope Fenestration SHGC Requirements
  39. 39. Class Exercise
  40. 40. • Scope and Application – Section 501 - General • Mandatory & Prescriptive Path Provisions – Section 502 - Building Envelope – Section 503 - Mechanical Systems – Section 504 - Service Water Heating – Section 505 - Electrical Power and Lighting • Performance Path – Section 506 - Building Performance Path IECC Chapter 5
  41. 41. 503.2 - Mandatory Provisions 503.3 - Simple HVAC Systems and Equipment (503.3) Section 503 Mechanical Systems 503.4 - Complex HVAC Systems and Equipment - OR -
  42. 42. Provisions Applicable to ALL Mechanical Systems  Duct and Plenum Insulation and Sealing  Piping Insulation  HVAC System Completion  Air System Design and Control  Motor Nameplate Horsepower  Heating Outside a Building  HVAC Load Calculations  Equipment and System Sizing  HVAC Equipment Performance Requirements  HVAC System Controls  Ventilation  Energy Recovery Ventilation Systems 503.2 Mechanical: Mandatory Provisions
  43. 43. Heating and cooling load sizing calculations required  ASHRAE/ACCA Standard 183  Other approved computation procedures – defined in Chapter 3 • Exterior design conditions – Specified by ASHRAE • Interior design conditions – Specified by Section 302 of the IECC • ≤ 72oF for heating load • ≥ 75oF for cooling load 503.2.1 Mandatory Mechanical: Mandatory HVAC Load Calculations
  44. 44. Output capacity SHALL NOT exceed sizing  Select the system which serves the greater load, heating or cooling – Exceptions • Standby Equipment with Required Controls • Multiple Units with Combined Capacities Exceeding Loads – Sequencing Controls Required 503.2.2 Mandatory Mechanical: Mandatory HVAC Load Calculations
  45. 45. • Applies to all equipment used in heating and cooling of buildings – Where components from different manufacturers are used calculations & supporting data demonstrating combined efficiency meets requirements • Must comply with all listed efficiencies Exception: Water-cooled centrifugal water-chilling packages 503.2.3 Mandatory Minimum Efficiency Requirements Mechanical: Mandatory HVAC Performance
  46. 46. Table 503.2.3(2) Mechanical: Mandatory HVAC Performance
  47. 47. Table 503.2.3(2) Mechanical: Mandatory HVAC Performance
  48. 48. • Control required for each zone 503.2.4 Mandatory • Thermostats must have at least a 5°F dead band Exception: • Thermostats requiring manual change over between heating and cooling Mechanical: Mandatory System Controls
  49. 49. Automatic time clock or programmable system  Exceptions • Zones operated continually • Zones with full HVAC load demand <6,800 Btu/h and has a readily accessible shut off switch Thermostatic setback capabilities  Capability to maintain zone temps down to 55ºF or up to 85ºF Automatic setback and shutdown 503.2.4.3 Mandatory Mechanical: Mandatory Off-Hour Controls
  50. 50. Motorized dampers that will automatically shut when the system or spaces are not in use.  Exceptions • Gravity dampers permitted in buildings < 3 stories • Gravity dampers permitted for buildings of any height located in Climate Zones 1-3 • Gravity dampers permitted for outside air intake or exhaust airflows of 300 cfm (0.14m3/s) or less. 503.2.4.4 Mandatory Mechanical: Mandatory Shut-Off Dampers
  51. 51. DCV must be provided for each zone with spaces > 500 ft² and the average occupant load > 40 people/1000 ft² of floor area where the HVAC system has:  An air-side economizer,  Automatic modulating control of the outdoor air damper, or  A design outdoor airflow > 3,000 cfm Demand control ventilation (DCV): a ventilation system capability that provides for the automatic reduction of outdoor air intake below design rates when the actual occupancy of spaces served by the system is less than design occupancy. 503.2.5.1 Mandatory Mechanical: Mandatory Demand Control Ventilation
  52. 52. Exceptions:  Systems with energy recovery per 503.2.6  Multiple zone systems without direct digital control of single zones communicating with central control panel  Systems with design outdoor airflow < 1,200 cfm  Spaces where supply airflow rate minus any makeup or outgoing transfer air requirement < 1,200 cfm 503.2.5.1 Mandatory Mechanical: Mandatory Demand Control Ventilation
  53. 53. Applies to individual fan systems with  Design supply air capacity ≥ 5,000 cfm  Minimum outside air supply of ≥ 70% of design supply air quantity Exhaust air recovery efficiency must be ≥ 50% 503.2.6 Mandatory Mechanical: Mandatory Energy Recovery Ventilation
  54. 54. Exceptions:  Where energy recovery ventilation systems prohibited by the IMC  Lab fume hood system with at least one of the following: – VAV hood exhaust and room supply systems capable of reducing exhaust and makeup air volume to ≤ 50% of design values – Direct makeup (auxiliary) air supply equal to at least 75% of exhaust rate, heated no warmer than 2ºF below room setpoint, cooled to no cooler than 3ºF above room setpoint, no humidification added, and no simultaneous heating and cooling use for dehumidification control  Systems serving uncooled spaces and heated to < 60ºF  Where > 60% of outdoor heating energy is from site- recovered or site solar energy  Heating systems in climates < 3,600 HDD  Cooling systems in climates with a 1% cooling design wet- bulb temperature < 64ºF  Systems requiring dehumidification that employ series-style energy recovery coils wrapped around the cooling coil 503.2.6 Mandatory Mechanical: Mandatory Energy Recovery Ventilation
  55. 55. Insulation required for supply and return ducts and plenums  Located in unconditioned space – minimum R5  Located outside the building - minimum R8 Exceptions  When located within equipment  When design temperature difference between interior and exterior of the duct or plenum doesn’t exceed 15ºF 503.2.7 Mandatory Mechanical: Mandatory Duct and Plenum Insulation and Sealing
  56. 56. Ducts designed to operate at static pressures ≤ 2 in. wg Securely fastened and sealed  Exceptions • When located within equipment • Design temperature difference between interior and exterior of duct or plenum <15°F 503.2.7.1 & 503.2.7.2 Mandatory Mechanical: Mandatory Duct Construction: Low and Medium Pressure Ducts
  57. 57. Ducts designed to operate at static pressures > 3 in. wg to be leak tested in accordance with SMACNA HVAC Air Duct Leakage Test Manual  Air leakage rate ≤ 6.0  CL = F x P0.65 • Where – F = leakage rate per 100 sf of duct surface area – P = test condition static pressure Must test ≥ 25% of the duct area and meet the requirements 503.2.7.1.3 Mandatory Mechanical: Mandatory Duct Construction: High Pressure Duct Systems
  58. 58. FLUID NOMINAL PIPE DIAMETER ≤ 1.5” ≥ 1.5” Steam 1 ½ 3 Hot water 1 ½ 2 Chilled water, brine or refrigerant 1 ½ 1 ½ All piping serving heating or cooling system must be insulated in accordance with Table 503.2.8 Minimum Pipe Insulation (thickness in inches) 503.2.8 Mandatory, Table 503.2.8 Mechanical: Mandatory Piping Insulation
  59. 59. Exceptions:  Piping internal to HVAC equipment (including fan coil units) factory installed and tested  Piping for fluid in temperature range – 55 < temp < 105°F  Piping for fluid not heated or cooled by electricity or fossil fuels  Runout piping ≤ 4’ in length and 1” in diameter between the control valve and HVAC coil 503.2.8 Mandatory Mechanical: Mandatory Piping Insulation
  60. 60.  Air System Balancing  Hydronic System Balancing  Manuals – Equipment Capacity and Required Maintenance – Equipment O & M Manuals – HVAC System Control Maintenance and Calibration Information – Written Narrative of Each System Operation 503.2.9 Mandatory Mechanical: Mandatory HVAC System Completion
  61. 61.  Maximum fan power requirements  Applies to HVAC systems with total fan system power > 5 hp  Each HVAC system at design conditions can not exceed allowable fan system motor nameplate hp (Option 1) or fan system bhp (Options 2) in Table 503.2.10.1(1) TABLE 503.2.10.1.1(1) FAN POWER LIMITATION bhp = brake horsepower 503.2.10 Mandatory, Table 503.2.10.1(1) Mechanical: Mandatory Air System Design and Control
  62. 62. • Fan System BHP – The sum of the fan brake horsepower of all fans that are required to operate a fan system design conditions to supply air from the heating or cooling source to the conditioned space and return it to the source or exhaust it to the outdoors. Mechanical: Mandatory Air System Design and Control
  63. 63. BHP option includes adjustment “adders” certain devices  Table 503.2.10.1(2) DEVICE ADJUSTMENT Credits Fully ducted return and/or exhaust air systems 0.5 in w.c. Return and/or exhaust air flow control devices 0.5 in w.c Exhaust filters, scrubbers, or other exhaust treatment. The pressure drop of device calculated at fan system design condition. Particulate Filtration Credit: MERV 9 thru 12 0.5 in w.c. Particulate Filtration Credit: MERV 13 thru 15 0.9 in w.c. Particulate Filtration Credit: MERV 16 and greater and electronically enhanced filters Pressure drop calculated at 2x clean filter pressure drop at fan system design condition. Carbon and Other gas-phase air cleaners Clean filter pressure drop at fan system design condition. Heat Recovery Device Pressure drop of device at fan system design condition. Evaporative Humidifier/Cooler in series with another cooling coil Pressure drop of device at fan system design conditions Sound Attenuation Section 0.15 in w.c. Deductions Fume hood exhaust exception -1.0 in w.c. Allowable Fan Motor Horsepower Commercial Building Mechanical Systems: Allowable Fan Motor Horsepower 503.2.10 Mandatory Mechanical: Mandatory Air System Design and Control
  64. 64. Exceptions Hospital and laboratory systems using flow control devices on exhaust and/or return for health and safety or environmental control permitted to use variable fan power limitation Individual exhaust fans ≤ 1 hp Fans exhausting air from fume hoods 503.2.10.1 Mandatory Mechanical: Mandatory Allowable Fan Motor Horsepower
  65. 65. Selected fan motor to be no larger than first available motor size greater than bhp Fan bhp on design documents Exceptions  Fans < 6 bhp, where first available motor larger than bhp has nameplate rating within 50% of bhp, next larger nameplate motor size may be selected  Fans ≥ 6 bhp, where first available motor larger than bhp has nameplate rating within 30% of bhp, next larger nameplate motor size may be selected bhp = brake horsepower503.2.10.2 Mandatory Mechanical: Mandatory Motor Nameplate Horsepower
  66. 66. Have to be radiant systems Controlled by an occupancy sensing device or timer switch  System is automatically de-energized when no occupants are present. 503.2.11 Mandatory Mechanical: Mandatory Heating Outside a Building
  67. 67. • 503.2.11 – Systems installed outside buildings shall be radiant systems, with occupancy systems or timers. Mechanical: Mandatory Heating Outside a Building
  68. 68. Simple systems  Unitary or packaged HVAC equipment  Serves one zone and controlled by a single thermostat Buildings served by unitary or packaged HVAC each serving 1 zone controlled by 1 thermostat. Two-pipe heating systems serving multiple zones are included if no cooling system is installed [Tables 503.2.3(1) through 503.2.3(5)] Section 503.3 Simple Systems 503.3, Tables 503.2.3(1) through 502.2.3(5) Mechanical: Prescriptive Simple or Complex Systems
  69. 69. Simple Systems Mechanical: Prescriptive Simple Systems
  70. 70. Unitary or packaged, single zone controlled by a single thermostat in the zone served. Simple Systems  Unitary packaged heating and cooling systems  Split system heating and cooling systems  Packaged terminal A/C and HPs  Fuel-fired furnace  Electrical resistance heating  Two-pipe heating systems w/o cooling 503.3 Mechanical: Prescriptive Simple HVAC Systems & Equipment
  71. 71.  Must include economizers dependent on climate zone  Capable of providing 100-percent outdoor air even if additional mechanical cooling is required (integrated economizer)  Must provide a means to relieve excess outdoor air 503.3 Mechanical: Prescriptive Simple HVAC Systems & Equipment
  72. 72. CLIMATE ZONES ECONOMIZER REQUIREMENT 1A, 1B, 2A, 7, 8 No requirement 2B, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B Economizers on cooling systems ≥ 54,000 Btu/ha a The total capacity of all systems without economizers shall not exceed 480,000 Btu/h per building, or 20 percent of its air economizer capacity, whichever is greater Table 503.3.1(1) 503.3.1, Table 503.3.1(1) Mechanical: Prescriptive Simple Economizers
  73. 73. CLIMATE ZONES COOLING EQUIPMENT PERFORMANCE IMPROVEMENT (EER OR IPLV) 2B 10% Efficiency Improvement 3B 15% Efficiency Improvement 4B 20% Efficiency Improvement Trade-off high cooling efficiency for economizer Table 503.3.1(2) Two Exceptions 503.3.1, Table 503.3.1(2) Mechanical: Prescriptive Simple Economizers
  74. 74. Complex Systems Mechanical: Prescriptive Complex Systems
  75. 75. This section applies to all HVAC equipment and systems not included in Section 503.3 Complex Systems  Packaged VAV reheat  Built-up VAV reheat  Built-up single-fan, dual-duct VAV  Built-up or packaged dual-fan, dual-duct VAV  Four-pipe fan coil system with central plant  Water Source heat pump with central plant  Any other multiple-zone system  Hydronic space heating and cooling system 503.4 Prescriptive Mechanical: Prescriptive Complex Systems
  76. 76. System ≥ 300,000 Btu/h must include  Temperature reset or variable flow • Automatic resets for supply water temperature by at least 25% of design supply-to-return temperature differences or • Reduce system pump flow by 50% of design flow using – Multiple Staged Pumps – Adjustable Speed Drives – Control Valves that modulate as a function of load 503.4.3.4 Commercial Building Mechanical Systems: Hydronic Water Loop Heat Pump Systems Mechanical: Prescriptive Hydronic Systems Controls
  77. 77. • Individual dual duct or mixing reheating and cooling systems with a single fan and with total capacities > 90,000 Btu/h (7.5 tons) should not have economizers 503.4.5.3 Mechanical: Prescriptive Single Fan Dual Duct & Mixing VAV Systems, Economizers
  78. 78. Class Exercise
  79. 79. • Scope and Application – Section 501 - General • Mandatory & Prescriptive Path Provisions – Section 502 - Building Envelope – Section 503 - Mechanical Systems – Section 504 - Service Water Heating – Section 505 - Electrical Power and Lighting • Performance Path – Section 506 - Building Performance Path IECC Chapter 5
  80. 80. Table 504.2 Minimum Performance of Water-Heating Equipment  Water Heater Types Covered • Electric Storage • Gas and Oil Storage • Instantaneous Water Heaters – Gas and Oil • Hot water boilers – gas and oil • Pool heaters • Unfired storage tanks Temperature Controls (504.3) Heat Traps (504.4) 504 Mandatory, Table 504.2 Service Water Heating Mandatory: Performance Efficiency
  81. 81. Non-circulating system insulation requirements  First eight feet of outlet piping on systems with no integral heat traps  1/2 inch of insulation required Circulating systems  1 inch of insulation 504.5 Service Water Heating Mandatory: Pipe Insulation
  82. 82. Ability to turn off circulating hot water pumps and heat trace tape when the system is not in operation  Automatically or manually 504.6 Service Water Heating Mandatory: System Controls
  83. 83. Pool heaters (504.7.1)  Readily accessible on-off switch  Natural gas or LPG fired pool heaters will not have continuously burning pilot lights Time switches (504.7.2)  Automatic controls required to operate pool heaters and pumps on a preset schedule  Exceptions • Where public health standards require 24 hour operation • Where pumps are required to operate solar and waste heat recovery pool heating systems 504.7 Service Water Heating Mandatory: Pool Requirements
  84. 84. Heated pools required to have a pool cover  Pool cover must be vapor retardant Pools heated to over 90oF  Minimum R-12 insulation Exception  Pools deriving > 60% energy for heating from site-recovered energy or solar source 504.7.3 Service Water Heating Mandatory: Pool Covers
  85. 85. Class Exercise
  86. 86. • Scope and Application – Section 501 - General • Mandatory & Prescriptive Path Provisions – Section 502 - Building Envelope – Section 503 - Mechanical Systems – Section 504 - Service Water Heating – Section 505 - Electrical Power and Lighting • Performance Path – Section 506 - Building Performance Path IECC Chapter 5
  87. 87. • Newly Installed Lighting Systems in a New Building, Addition, or Tenant Improvements and Build-outs • Existing Lighting Systems that are altered • Change in Occupancy that Increases Energy • Change in Occupancy that requires less LPD as shown in Table 505.3.2 Exceptions: • Historic buildings – State or National listing – Eligible to be listed • Alterations where less than 50% of the luminaires in a space are replaced and installed interior power lighting is not increased • Lighting within dwelling units – Where ≥ 50% of permanently installed fixtures include high- efficacy lamps 101 Lighting Systems Scope
  88. 88. • Interior Lighting requirements  Required Controls  Wattage/Efficiency Limits • Interior Lighting Power Allowances • Exterior Lighting Controls  Required Controls  Lamp Efficiency • Exterior Lighting Power Allowances • Electric Metering505 Mandatory Lighting Systems Scope
  89. 89. Independent Lighting Control required for each space surrounded by floor-to-ceiling partitions  Must be located in the space served, - OR -  Switched from a remote location • Must have indicator that identifies the lights served and their status (off or on)  Exemptions • Security or emergency areas that must be continuously lighted • Lighting in stairways or corridors that are elements of the means of egress 505.2 Lighting Systems Mandatory: Interior Lighting Controls
  90. 90. Light Reduction Controls must allow the occupant to reduce connected lighting  By at least 50%  In a reasonably uniform illumination pattern 505.2.2.1 Lighting Systems Mandatory: Interior Light Reduction
  91. 91.  Controlling all lamps or luminaires  Dual switching of alternate rows of luminaires, alternate luminaires or lamps  Switching middle lamp luminaires independently from the outer lamps  Each luminaire or each lamp SS Dimmer Switch D Alternating Luminaires Dimming SS Alternating Lamps 505.2.2.1 Lighting Systems Mandatory: Interior Light Reduction Control Options
  92. 92. Light Reduction Control Not required for the following: Areas with only one luminaire Areas controlled by occupancy sensor Corridors, storerooms, restrooms or public lobbies Sleeping units Spaces with <0.6 w/ft2 505.2.2.1 Lighting Systems Mandatory: Interior Light Reduction Exemptions
  93. 93. Automatic lighting shutoff control device required in all buildings larger than 5,000 ft2 Building Defined:  “Any structure used or intended for supporting or sheltering any use or occupancy”  Building area surrounded by exterior walls and fire walls Exempted spaces  Sleeping units  Lighting for patient care  When an automatic shutoff would endanger occupant safety or security 505.2.2.2 Lighting Systems Mandatory: Interior Automatic Lighting Shutoff
  94. 94. 1. Control lights on a scheduled basis (automatic time switch) • Time-of-day controller • Controls ≤ 25,000 ft2 and not more than one floor, or 2. Occupant sensor • Turn lights off within 30 minutes of occupant leaving the space 3. Signal from another control or alarm that indicates the area is unoccupied Office Occupancy Sensor Conference Room Restrooms Lobby Connect to Lighting in Lobby Open Bay Office Connect to Lighting in Open Bay Office Automatic Lighting Control 110’ 50’ Automatic Lighting Shutoff Compliance Options Courtesy Britt-Makela Group 505.2.2.2 Lighting Systems Mandatory: Automatic Shutoff Options
  95. 95.  Readily accessible  Within view of the lights or area controlled  Manually operated  ≤ 2 hour override – The override allows lighting to remain on no more than 2 hours when override is initiated  Controls an area ≤ 5,000 ft2  Exemptions – Can be over 2 hour override in malls and arcades, auditoriums, single-tenant retail space, industrial facilities and arenas when using captive key override – Override in malls and arcades, auditoriums, single-tenant retail space, industrial facilities and arenas can cover up to 20,000 ft2 505.2.2.2.1 Lighting Systems Mandatory: Automatic Shutoff Occupant Override
  96. 96. Feature that turns off all loads for 24 hours then resumes the normally scheduled operation Exceptions  Retail stores and associated malls  Restaurants  Grocery stores  Places of religious worship  Theaters 505.2.2.2.2 Lighting Systems Mandatory: Automatic Shutoff Holiday Scheduling
  97. 97. • Daylight Zones  Must have individual control of the lights independent of general area lighting • Contiguous daylight zones adjacent to vertical fenestration  Can be controlled by a single controlling device if the zone doesn’t include areas facing more than two adjacent orientations (i.e., north, east, south, west) • Daylight zones under skylights > 15 ft from the perimeter  Must be controlled separately from daylight zones adjacent to vertical fenestration Exception:  Daylight spaces 1) enclosed by walls or ceiling height partitions and 2) containing two or fewer light fixtures • not required to have a separate switch for general area lighting Note: required controls may be manual or automatic 505.2.2.3 Lighting Systems Mandatory: Daylight Zone Control
  98. 98.  the width of the window plus 2 feet on each side, or  the window width plus distance to opaque partitions, or  the window width plus one- half the distance to adjacent skylight or vertical fenestration, whichever is least.505.2.2.3 Lighting Systems Daylight Zone Definition The daylight zone depth is assumed to be 15 feet into the space or to the nearest ceiling height opaque partition, whichever is less The daylight zone width is assumed to be:
  99. 99. The area under skylights whose horizontal dimension, in each direction, is equal to the skylight dimension plus the smaller of:  The floor-to-ceiling height, or  The distance to a ceiling height opaque partition, or  One-half the distance to adjacent skylights or vertical fenestration (whichever is least) 505.2.2.3 Lighting Systems Daylight Zone Under Skylights
  100. 100. Standard Room Suite $$ $$ $$ $$ $$ $$ $$ $$ $$ $$  Applies to hotels, motels, boarding houses or similar  Master switch required at each room or main room entry  Must control all permanently wired luminaires or switched receptacles Exceptions: bathrooms 505.2.3 Lighting Systems Mandatory: Sleeping Unit Controls
  101. 101.  For dusk-to-dawn lighting: astronomical time switch or photosensor  For all other: astronomical time switch OR photosensor + time switch  All time switches must have at least 10 hour battery backup 505.2.4 Lighting Systems Mandatory: Exterior Lighting Controls
  102. 102. Tandem Wiring for all Odd Numbered Lamp Configurations Exceptions  Where electronic high frequency ballasts are used  Luminaires on emergency circuits  Luminaires with no available pair in the same area 505.3 Mandatory Lighting Systems Mandatory: Tandem Wiring
  103. 103. Exit Signs  Internally illuminated exit signs shall not exceed 5 watts per side 505.4 Lighting Systems Mandatory: Exit Signs
  104. 104. Sum the wattage of all proposed connected lighting power This must include all lighting that is part of the design for the space including:  Overhead lighting  Task lighting  Decorative lighting 505.5.1 Lighting Systems Prescriptive: Interior Lighting Power
  105. 105. Connected Interior Lighting Power must not exceed Interior Lighting Power Allowance 1. Calculate Interior Lighting Power Allowance • Building Area type allowance • Additional allowances 2. Calculate proposed connected lighting power • Wattage calculation “rules” • Exempted lighting 3. Compare values: proposed wattage must be less than or equal to allowed wattage 505.5 Lighting Systems Prescriptive: Interior Lighting Power
  106. 106. Connected power for following not included in calculations:  Professional sports arena playing field  Sleeping unit lighting  Emergency lighting automatically off during normal building operation  Lighting in spaces specifically designed for use by occupants with special lighting needs including visual impairment and other medical and age related issues  Lighting in interior spaces specifically designated as a registered interior historic landmark  Casino gaming areas  Lighting equipment used for the following exempt if in addition to general lighting and controlled by an independent control device • Task lighting for medical and dental procedures • Display lighting for exhibits in galleries, museums and monuments 505.5.1 Lighting Systems Exemptions to Interior Lighting Power
  107. 107.  Theatrical, stage, film, and video production  Used for photographic processes  Integral to equipment or instrumentation installed by manufacturer  Plant growth or maintenance  Advertising or directional signage  Food warming and food prep equipment (in restaurant bldgs & areas)  Lighting equipment that is for sale  Lighting demonstration equipment in lighting education facilities  Approved because of safety or emergency considerations, exclusive of exit lights  Integral to both open and glass-enclosed refrigerator and freezer cases  In retail display windows when the display is enclosed by ceiling- height partitions  Furniture-mounted supplemental task lighting controlled by automatic shutoff505.5.1 Lighting Systems Exemptions to Interior Lighting Power
  108. 108. Building Area Type  Note: Alternate standard ASHRAE/IESNA 90.1-2007 provides whole building and space-by-space options Table 505.5.2 505.5.2 Lighting Systems Interior Lighting Power Allowances
  109. 109. First, choose an appropriate “Building Area Type” from the allowance table (505.5.2)  “Building Area” includes all spaces that are associated with that business or function type.  For example a space with: • Corridors, • Restrooms, • A lobby, and • Office space …would be considered an Office Building Area Type Then...multiply the lighting power density (W/ft2) by the total building square footage to get allowed watts for compliance 505.5.2 Lighting Systems Interior Lighting Power Allowance Calculation
  110. 110. Office: 200,000 ft2 1.0 W/ft2 = 200,000 W Table 505.5.2 Table 505.5.2 Example: Office A 200,000 ft2 office building that contains corridor, restrooms, break rooms and a lobby is given 1.0 W/ft2 for the entire building Lighting Systems Interior Lighting Power Allowance Calculation
  111. 111. (Retail Area 1 x 0.6 W/ft2) + (Retail Area 2 x 0.6 W/ft2) + (Retail Area 3 x 1.4 W/ft2) + (Retail Area 4 x 2.5 W/ft2), Where:  Retail Area 1 = the floor area for all products not listed in Retail Area 2, 3 or 4.  Retail Area 2 = the floor area used for the sale of vehicles, sporting goods and small electronics.  Retail Area 3 = the floor area used for the sale of furniture, clothing, cosmetics and artwork.  Retail Area 4 = the floor area used for the sale of jewelry, crystal, and china. Table 505.5.2 - Footnotes Lighting Systems Retail Lighting Power Allowance Additional Interior Lighting Power Allowance = 1000 watts +
  112. 112. Exception: Other merchandise categories may be included in Retail Areas 2 through 4 above, provided that justification documenting the need for additional lighting power based on visual inspection, contrast, or other critical display is approved by the authority having jurisdiction. Photo courtesy of Ken Baker, K energy Table 505.5.2 - Footnotes Lighting Systems Retail Lighting Power Allowance
  113. 113. How is an allowance determined if the building has more than one Building Area Type?  Example – A building contains the following area types • Museum: 40,000 ft2 • Retail 5,000 ft2 • Cafeteria: 10,000 ft2 Use the more specific building area type where more than one area type exists in the building Sum the individual (lighting power density x area square footage) values for Total Power Allowance 505.5.2 Lighting Systems Lighting Power Allowance for Multiple Occupancy
  114. 114. Cafeteria:10,000 ft2 at 1.4 W/ft2 = 14,000 W Museum: 40,000 ft2 at 1.1 W/ft2 = 44,000 W Retail: 5,000 ft2 at 1.5 W/ft2 = 7,500 W Total watts allowed = 65,500 W Table 505.5.2 505.5.2 Lighting Systems Lighting Power Allowance for Multiple Occupancy
  115. 115. Lighting wattage must be calculated in accordance with Section 505.6  Screw lamp holders: maximum labeled wattage of the luminaire  Low voltage lighting: transformer wattage  Line voltage track: 1. specified wattage with minimum of 30 W/linear ft OR 2. wattage limit of system’s circuit breaker OR 3. wattage limit of other permanent current limiting devices  Other: manufacturer’s rated wattage of lamp and associated ballast 505.6 Mandatory Lighting Systems Mandatory: Exterior Lighting Requirements
  116. 116. Building grounds lighting luminaires over 100 watts must have source efficacy of at least 60 lumens per watt Exceptions  Controlled by motion sensor  Any of the exterior lighting power allowance exceptions  As approved for a historical, safety, signage, or emergency consideration Light Source Typical System Efficacy Range in LPW (varies depending on wattage and lamp type) Incandescent 10-18 Halogen incandescent 15-20 Compact fluorescent (CFL) 35-60 Linear fluorescent 50-100 Metal halide 50-90 505.6.1 Lighting Systems Mandatory: Building Grounds Lighting
  117. 117. Connected Exterior Lighting Power must not exceed Exterior Lighting Power Allowance 1. Calculate exterior lighting power allowance • Lighting power densities by exterior function and by applicable lighting zone 2. Calculate proposed connected lighting power • Wattage calculation “rules” • Exempted lighting 3. Compare values: proposed wattage must be less than or equal to allowed wattage 505.6.2 Lighting Systems Mandatory: Exterior Lighting Power Limits
  118. 118. The following lighting does not need to be included in the proposed lighting calculation: • Specialized signal, directional, and marker lighting associated with transportation • Advertising signage or directional signage • Lighting integral to equipment or instrumentation and installed by its manufacturer • Lighting for theatrical purposes, including performance, stage, film production, and video production • Lighting for athletic playing areas • Temporary lighting • Lighting for industrial production, material handling, transportation sites, and associated storage areas • Theme elements in theme/amusement parks • Lighting used to highlight features of public monuments and registered historic landmark structures or buildings 505.6.2) Lighting Systems Exemption from Exterior Lighting Calculation
  119. 119. What areas are covered under exterior lighting allowances?  Tradable surfaces Common exterior lighted needs that can be traded for other needs. • For example, wattage allowed for parking lot lighting can be “traded” and used for canopy lighting.  Nontradable surfaces Less common exterior lighted needs that cannot be traded for other needs. • These applications have more specific security or task illuminance needs. Table 505.6.2(2) Lighting Systems Exterior Lighting Power Limits
  120. 120.  Uncovered parking lots and areas  Walkways (under and over 10 feet wide)  Stairways  Pedestrian tunnels  Main building entrances and exits  Other doors  Entry canopies  Free-standing and attached sales canopies  Open sales areas  Street frontage sales areas Table 505.6.2(2) Lighting Systems Exterior Lighting Tradable Surfaces
  121. 121.  Building facades  Automated teller machines and night depositories  Entrances and gatehouse inspection stations at guarded facilities  Loading areas for law enforcement, fire, ambulance and other emergency vehicles  Drive-up windows/doors  Parking near 24-hour retail entrances Table 505.6.2(2) Lighting Systems Exterior Lighting Non-Tradable Surfaces
  122. 122. Lighting Zone Description 1 Developed areas of national parks, state parks, forest land, and rural areas 2 Areas predominantly consisting of residential zoning, neighborhood business districts, light industrial with limited nighttime use and residential mixed use areas 3 All other areas 4 High-activity commercial districts in major metropolitan areas as designated by the local land use planning authority Table 505.6.2(1) Lighting Systems Exterior Lighting Zones
  123. 123. Zone 1 Zone 2 Zone 3 Zone 4 Tradable Surfaces Building Entrances and Exits Main entries 20 W/linear foot of door width 20 W/linear foot of door width 30 W/linear foot of door width 30 W/linear foot of door width Other doors 20 W/linear foot of door width 20 W/linear foot of door width 20 W/linear foot of door width 20 W/linear foot of door width Entry Canopies 0.25 W/ft2 0.25 W/ft2 0.4 W/ft2 0.4 W/ft2 Sales Canopies Free-standing and attached 0.6 W/ft2 0.6 W/ft2 0.8 W/ft2 1.0 W/ft2 Outdoor Sales Open areas (including vehicle sales lots) 0.25 W/ft2 0.25 W/ft2 0.5 W/ft2 0.7 W/ft2 Street frontage for vehicle sales lots in addition to “open area” allowance No allowance 10 W/linear foot 10 W/linear foot 30 W/linear foot Table 505.6.2(2) Lighting Systems Exterior Lighting Power Allowances
  124. 124. Example Bank ATM Walkway 5 ft wide Canopy Parking Lot Parking: 10,000 ft2 Canopy: 100ft2 Walkway: 300 ft ATM– One location How many tradable watts are allowed for this project? How many nontradablewatts? Bank ATM Walkway 5 ft wide Canopy Parking Lot Bank ATM Walkway 5 ft wide Canopy Parking Lot Parking: 10,000 ft2 Canopy: 100 ATM– One location How many tradable watts are allowed for this project? How many nontradablewatts? Lighting Systems Exterior Lighting Power Allowances
  125. 125. Separate metering required for each dwelling unit 505.7 Mandatory Lighting Systems Mandatory: Electrical Energy Consumption
  126. 126. Class Exercise
  127. 127. • Scope and Application – Section 501 - General • Mandatory and Prescriptive Path Provisions – Section 502 - Building Envelope – Section 503 - Mechanical Systems – Section 504 - Service Water Heating – Section 505 - Electrical Power and Lighting • Performance Path – Section 506 - Building Performance Path IECC Chapter 5
  128. 128. • Energy loads that must be included in the Energy Simulation Analysis – Heating, cooling systems and fans systems – Service water heating – Lighting power – Receptacle and process loads • Mandatory requirements – Mandatory provisions of building envelope, mechanical, service water heating and lighting Total Building Performance Scope
  129. 129. Need to model a standard reference design to the mandatory and prescriptive requirements. Convert annual energy consumption to annual energy cost. Need to model your proposed design. Convert annual energy consumption to annual energy cost. Compliance is based on annual energy cost for proposed design < annual cost for standard reference design. For both cases unite energy cost has to be the same. For both cases, simulation rules may apply. 506.3 Total Building Performance Performance-Based Compliance
  130. 130. 506.3 Compliance based on total building performance requires that a proposed building (proposed design) be shown to have an annual energy cost that is less than or equal to the annual energy cost of the standard reference design. Energy prices shall be taken from a source approved by the code official, such as the Department of Energy, Energy Information Administration's State Energy Price and Expenditure Report. Total Building Performance Performance-Based Compliance
  131. 131. http://www1.eere.energy.gov/buildings/commercial_initiative/modeling_software.html Calculation Software Tools – Sec. 506.6
  132. 132. ASHRAE 90.1 Compliance Option
  133. 133. IECC Code Compliance Exercise
  134. 134. Building Location: Phoenix, AZ Energy Code: 2009 IECC Occupancy: Retail (Gr0up M) Construction: • Single-story, pitched wood roof with flat ceiling, wood-frame walls (16” o.c.), concrete slab-on-grade without basement. Openings on all four walls. Energy Code Compliance Exercise 3’ x 7’ door
  135. 135. Energy Code Compliance Exercise Determine energy code compliance using the following paths: 1) Prescriptive requirements 2) COMcheck energy compliance software – www.energycodes.gov You must select: 1) Insulation values for walls) and ceiling 2) U-factor and SHGC for fenestration 3) Service water heating 4) Mechanical systems 5) Interior lighting
  136. 136. COMcheck™ DOE’s commercial compliance software (Windows or Mac version) Desktop Software Tools Web-Based Tools www.energycodes.gov
  137. 137. • For commercial buildings- can show compliance through the prescriptive approach, trade-off approach or the performance approach. • COMcheck utilizes only the trade-off approach. COMcheck™ DOE’s commercial compliance software
  138. 138. Case Study Commercial Renovation
  139. 139. The office space goes beyond code compliance to result in 42.3% energy savings of the proposed building over the baseline building (ASHRAE 90.1 2004). Commercial Case Study Major Renovation – Downtown Scottsdale Existing Building: Office with 2nd story apartment 1614 sq. ft. conditioned space 1110 sq. ft. roof deck Renovated Building: Two story design office and studio 2330 sq. ft. conditioned space 340 sq. ft. roof deck
  140. 140. FLOOR LAYOUT The building was built in 1981 and is two stories with office on the first floor and residence on the second. Commercial Case Study Major Renovation – Downtown Scottsdale
  141. 141. As a major renovation, the project complies to the scope and requirements of additions and alterations to existing buildings. Main points of Focus : 1. Building Envelope : Ceiling and Skylights 2. Internal Loads 3. High efficiency HVAC Systems • Simulation Software Used: eQuest (DOE2.2) • Code Compliance to: ASHRAE 90.1 2004 Commercial Case Study Major Renovation – Downtown Scottsdale ENERGY MODELING
  142. 142. BUILDING ENVELOPE • Ceiling insulation has been added to improve the efficiency of the building envelope • New insulated walls at east and west exposures with exterior radiant finishes • New high performance windows on east and west exposures with exterior movable louvers Before Retrofit After Retrofit Description IECC Project Ceiling R Value 20ci 34.29ci Wall R Value R-13 R-19 Window U Factor 0.75 0.29 Window SHGC 0.33 0.39 Commercial Case Study Major Renovation – Downtown Scottsdale
  143. 143. Old Systems : • 3 Ton Heat Pump units. SEER 10. New Systems: • Two 5 Ton high efficiency Trane SEER 16 heat pump two stage units with R410A refrigerant. • No Economizers. Ventilation per IMC: • HP-1 is designed to provide 100 CFM of OSA • HP-2 is designed to be provide with 200 CFM. • Demand controlled ventilation is exempt due to an occupant load of less than 40. Description IECC Project Cooling System Efficiency SEER13 SEER16 MECHANICAL SYSTEMS: BEYOND CODE Commercial Case Study Major Renovation – Downtown Scottsdale MECHANICAL
  144. 144. LIGHTING LIGHTING EFFICIENCY • 15% energy savings over baseline building in lighting end use Occupancy Sensors: • A 10% lighting power credit applied to all lighting connected to occupancy sensors. • Project has installed occupancy sensors for 75% of the connected lighting load LIGHTING SYSTEM: BEYOND CODE Commercial Case Study Major Renovation – Downtown Scottsdale
  145. 145. SOLAR PHOTOVOLTAIC SYSTEM • Twelve Kyocera photovoltaic modules rated at 2.47 DC • Offsets approximately 23% of the annual energy use • The actual offset per year in costs is about $610 Commercial Case Study Major Renovation – Downtown Scottsdale RENEWABLE ENERGY
  146. 146. ANNUAL ENERGY CONSUMPTION Energy Analysis Summary Commercial Case Study Major Renovation – Downtown Scottsdale
  147. 147. What’s on the horizon? 2012 IECC International Green Construction Code (IgCC) ASHRAE 189.1
  148. 148. Released in 2011  New compliance option to choose between high performance lighting, high performance HVAC equipment, or onsite renewable power generation  More efficient air leakage requirements by requiring continuous air barriers for the building envelope  Commissioning requirement for HVAC systems 2012 IECC Commercial Changes Most significant increase in history of energy efficiency codes
  149. 149. Released in 2011  Increased efficiency of the opaque thermal envelope provisions  Increased fenestration efficiency  Mandated automatic daylighting controls for buildings with a window- to-wall ratio over 30%  A requirement for skylights and daylighting controls for spaces over 10,000 ft2 in certain building types Recognizes the the energy code as a design document 2012 IECC Commercial Changes (cont.)
  150. 150. Released March 2012  Site Development and Land Use  Materials Resources  Energy Efficiency  Water Efficiency  Indoor Environmental Quality  Commissioning, Operation and Maintenance International Green Construction Code (IgCC)
  151. 151. • Commercial and multi-family projects • Overlay code designed to integrate with established building codes • Written in mandatory language as a model code for local adoption • Not a substitute for good design • Work within regulatory framework International Green Construction Code (IgCC)
  152. 152. LEED and Other Green Rating Programs Signature Buildings International Green Construction Code Standard Buildings Closing gap between minimum code requirements and criteria for LEED certification Gap between IgCC and LEED Ceiling Floor
  153. 153. Energy Efficiency and Atmospheric Quality  Zero Energy Performance Index (zEPI) of 51  Scottsdale’s current energy code requires a baseline energy performance equivalent to a zEPI of 62 0 20 40 60 80 100 120 2000 2012 2015 2018 2021 2024 2027 2030 zEPI Score zEPI Score
  154. 154. Energy Efficiency and Atmospheric Quality  Energy Metering and Monitoring  capability to measure energy use and on-site production  data acquisition and management system capable of storing not less than 36 months of data  Renewable Energy Systems  renewable energy must provide at least 2% of total calculated annual energy use
  155. 155. ASHRAE 189.1P Standard for Green Commercial Buildings Site Sustainability Water Use Efficiency Energy Efficiency Indoor Environmental Quality Materials and Resources Construction and Operation SS WE EE IEQ MR CO 2011 Edition
  156. 156. Energy Efficiency Highlights • More energy efficient than ASHRAE 90.1- 2010 • Renewable energy Provisions • Energy measurement for verification • Electric peak load reduction
  157. 157. Resources
  158. 158. Adopt, Implement, Enforce Resources
  159. 159. Resources • http://www.iccsafe.org • http://www.energycodes.gov • http://bcap-energy.org • http://www.naseo.org • http://www.eere.energy.gov • https://energycode.pnl.gov/REScheckWeb/ • https://energycode.pnl.gov/COMcheckWeb/ • http://resourcecenter.pnl.gov/cocoon/morf/Reso urceCenter

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