2009 IECC: Advanced

Energy Code Workshop – Level 201
Commercial Provisions of the 2009
IECCInstructor – Anthony C. Floyd, AIA, ICC Certified Professional, LEED AP

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

International Energy
Conservation Code
ASHRAE Standard 90.1
International Green
Construction Code
Building Energy Codes

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

– 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
– Section 506 - Building Performance Path
IECC Chapter 5

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

General Requirements
Climate Zones
Figure 301.1

General Requirements
Arizona Climate Zones

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

– 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
– Section 506 - Building Performance Path
IECC Chapter 5

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

• Roof/Ceiling Assemblies
• Wall Assemblies
• Below Grade Walls
• Floor Assemblies over unconditioned
space
• Slab Edge
• Vertical Fenestration and Skylights
Building Thermal Envelope

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)

 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
Mandatory: Air Leakage

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
Mandatory: Air Leakage

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
Mandatory: Outdoor Air Intakes & Exhaust Openings

Equip cargo doors and loading
dock doors with weatherseals
Goal is to restrict infiltration
502.4.6
Mandatory: Weatherseals

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
Mandatory: Recessed Lighting

Table 502.1.2
Prescriptive

Prescriptive: Opaque Elements and Assemblies
502.1.2 (U-Factor); 502.2.2(1) and (2)
(R-Value)

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)
Prescriptive: Roof R-Value and U-Factor

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)
R-Value: Roof Insulation

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
R-Value: Roof Insulation

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)
R-Value: Wall Insulation

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)
Mass Walls

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)
Mass Walls: Concrete Masonry Units

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)
Metal Building Walls

 Cavity insulation or
cavity plus continuous
(ci)
 Continuous insulation
not broken up by
framing members e.g.
rigid board insulation
Table 502.2(1)
Wood, Metal, Frame and Other Walls

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
Floors over Unconditioned Space

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
Floors over Unconditioned Space

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
Slab-on-Grade

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
Slab-on-Grade

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
Opaque Doors

Table 502.3, 502.3
Prescriptive: Fenestration

Percentage of Vertical
Fenestration Area to Gross
Wall Area
 Allowed up to 40% maximum
of above grade wall
502.3.1 – Prescriptive (Max Area)
Prescriptive: Maximum Vertical Fenestration

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
Vertical Fenestration

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)
Fenestration SHGC Requirements

The Effect of Overhangs on Fenestration SHGC
 Overhangs allow a higher SHGC
product to be installed
 Projection factor must be calculated
502.3.2
Fenestration SHGC Requirements

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 -

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

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

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
HVAC Load Calculations

• 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
HVAC Performance

Table 503.2.3(2)
HVAC Performance

• 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
System Controls

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
Off-Hour Controls

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
Shut-Off Dampers

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
Demand Control Ventilation

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
Demand Control Ventilation

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
Energy Recovery Ventilation

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
Energy Recovery Ventilation

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
Duct and Plenum Insulation and Sealing

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
Duct Construction: Low and Medium Pressure Ducts

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
Duct Construction: High Pressure Duct Systems

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
Piping Insulation

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
Piping Insulation

 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
HVAC System Completion

 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)
Air System Design and Control

• 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.

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.
13 thru 15
0.9 in w.c.
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
Heat Recovery Device
Pressure drop of device at fan
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

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
Allowable Fan Motor Horsepower

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
Motor Nameplate Horsepower

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
Heating Outside a Building

• 503.2.11 – Systems installed outside buildings
shall be radiant systems, with occupancy
systems or timers.
Heating Outside a Building

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

Simple Systems
Simple Systems

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
Simple HVAC Systems & Equipment

 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
Simple HVAC Systems & Equipment

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)
Simple Economizers

CLIMATE ZONES COOLING EQUIPMENT PERFORMANCE
IMPROVEMENT (EER OR IPLV)
2B 10% Efficiency Improvement
Trade-off high cooling efficiency for economizer
Table 503.3.1(2)
Two Exceptions
503.3.1, Table 503.3.1(2)
Simple Economizers

Complex Systems
Complex Systems

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
Complex Systems

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
Hydronic Systems Controls

• 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
Single Fan Dual Duct & Mixing VAV Systems,
Economizers

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

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
Mandatory: Pipe Insulation

Ability to turn off circulating hot water pumps and heat trace
tape when the system is not in operation
 Automatically or manually
504.6
Mandatory: System Controls

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
Mandatory: Pool Requirements

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
Mandatory: Pool Covers

• 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

• 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

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

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

 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

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

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

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

 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

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

• 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

 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:

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

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

 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

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

Exit Signs
 Internally illuminated exit signs shall not
exceed 5 watts per side
505.4
Lighting Systems
Mandatory: Exit Signs

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

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

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

 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

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

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

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

(Retail Area 1 x 0.6 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.
sale of furniture, clothing, cosmetics and
artwork.
sale of jewelry, crystal, and china.
Table 505.5.2 - Footnotes
Lighting Systems
Retail Lighting Power Allowance
Additional Interior Lighting Power Allowance = 1000 watts +

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

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

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

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

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

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

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

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

 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

 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

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

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

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

Separate metering required for each dwelling unit
505.7 Mandatory
Lighting Systems
Mandatory: Electrical Energy Consumption

• 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

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
Performance-Based Compliance

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.
Performance-Based Compliance

http://www1.eere.energy.gov/buildings/commercial_initiative/modeling_software.html
Calculation Software Tools – Sec. 506.6

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

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

COMcheck™
DOE’s commercial compliance software
(Windows or Mac version)
Desktop Software Tools Web-Based Tools
www.energycodes.gov

• 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

Case Study
Commercial Renovation

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

FLOOR LAYOUT
The building was built in 1981 and is two stories
with office on the first floor and residence on the
second.
Scottsdale

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
Scottsdale
ENERGY MODELING

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
Scottsdale

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
Scottsdale
MECHANICAL

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
Scottsdale

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
Scottsdale
RENEWABLE ENERGY

ANNUAL ENERGY CONSUMPTION
Energy Analysis Summary
Scottsdale

What’s on the horizon?
2012 IECC
International Green Construction
Code (IgCC)
ASHRAE 189.1

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

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.)

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)

• 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)

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

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

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

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

Energy Efficiency
Highlights
• More energy efficient than
ASHRAE 90.1- 2010
• Renewable energy Provisions
• Energy measurement for
verification
• Electric peak load reduction

Adopt, Implement, Enforce
Resources

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

2009 IECC: Advanced

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