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Title 24 2019 – Your Greatest Ideas
Turned Into Codes
02.04.2019
Neil Bulger, PE
Red Car Analytics
4460 Chico Ave.
Santa Rosa, California 95407
Big Bold Goals in 2011
Residential Code Change
(NET ZERO 2020!?#$#!)
Commercial Code Change
(NET ZERO 2030)
Commercial Building (Non-Res)
When 2019 Code
Change Advocacy
Starts
Code is
Law
2020
Information Is Online (As of 4/23/2018)
https://www.energy.ca.gov/title24/2019standards/rulemaking/doc
uments/2018-05-09_hearing/2019_Revised_EnergyCode.php
Mandatory HVAC Changes
1. Higher Filtration
2. Balanced Ventilation Multi-Family
3. Commercial Ventilation Calculation
4. Natural Ventilation / Exhaust Rates / DCV & Occ Control
5. Fault Detection for All
6. Equipment Efficiency
7. Demand Management
Prescriptive HVAC Changes
1. Cooling Tower
2. Fan Power Formula
3. Exhaust Transfer Air
4. Solar Hot Water
Lighting Changes
Process Systems
a) Variable Fumehoods Control
b) Stack Exhaust Fan Power
Topics Included Today
Mandatory Requirements
120.1 Ventilation and Indoor Air Quality
MERV 13 filters required
Multifamily HVAC Systems
All Non-Res HVAC Systems
Mandatory Requirements
120.1 Ventilation and Indoor Air Quality
Balanced Ventilation Systems
Multifamily Buildings
Pnnl.gov
basc.pnnl.gov/resource-guides/whole-building-delivered-ventilation
• Exhaust only is most common.
• Not very effective ventilation.
• Air comes from where?
• Cannot filter the air.
• It is low cost.
• It was standard when buildings were
leaky and had low exhaust rates.
120.1 Ventilation and Indoor Air Quality
Mandatory Requirements
New Ventilation Equation
Nonresidential
Title 24
2019
Semi-Simple Method Space Types & Names
For ventilation quantities, all spaces covered by part 6 (ENERGY CODE)
take precedence over part 4 (MECH CODE).
120.1 Ventilation and Indoor Air Quality
Mandatory Requirements
New Ventilation Equation
Nonresidential
Simple Formulas
Vz = Rp x Pz
Vent = 15 cfm/person x People
Vz = Ra x Az
Vent = xx cfm/sf_type x Area
OR
Greater of the two
equations
Space Types & Names
120.1 Ventilation and Indoor Air Quality
New Ventilation Equation
Nonresidential
Unique airflow rates for California
Unique airflow rates for California
Exhaust
cfm/sf
Supply
cfm/sf [3]
Supply
cfm/sf [2]
Supply cfm/sf [1]
120.1 Ventilation and Indoor Air Quality
2016 Nonresidential
Aiflow/Area table
2019 Nonresidential
Aiflow/Area table
120.1 Ventilation and Indoor Air Quality
Mandatory Requirements
New Ventilation Equation
Nonresidential
Simple Formulas
Vz = Rp x Pz
Vent = 15 cfm/person x People
Vz = Ra x Az
Vent = xx cfm/sf_type x Area
OR
Vent = 0.15 cfm/sf_type* x Area
The Demand Control Ventilation lower limit
*most spaces
120.1 Ventilation and Indoor Air Quality
Mandatory Requirements
New Ventilation Equation
Nonresidential
Simple Formulas
Ventilation in Commercial Buildings will Increase
In Most Cases
120.1 Ventilation and Indoor Air Quality
Required Demand Control Ventilation
Required for All Spaces
Greater than:
25 people per 1000 sq ft
(or, less than:
40 square feet / person)
120.1 Ventilation and Indoor Air Quality
Occupancy Sensing Zone Controls
Mandatory Requirements
All Spaces that require
Lighting Shut-Off Controls
shall require ventilation
controls to go to ZERO for
allowable space types.
Office Space
Corridor
Multipurpose Assembly
Classrooms
Conference Rooms
120.1 Ventilation and Indoor Air Quality
Filtration
Ventilation
Air
Exhaust
Air
New Formula
Semi-Same
cfm/sf or cfm/person
New
Table cfm/sf
MERV 13
Demand Control
Vent (CO2)
Occ Sensing
Control Vent
120.1 Ventilation and Indoor Air Quality
Natural Ventilation
Nonresidential
1. Single Sided Opening
2. Double Sided Opening
3. Corner Opening
Openable area shall be not
less than 4 percent of the
net occupiable floor area.
225 sf office x 4% = 9 sqft
Mandatory Requirements
120.2 Economizer Fault Detection Diagnostics (FDD)
http://www.automatedbuildings.com/news/feb13/
articles/adms/130121113909adms.html
Required for All Air
Handling Units with
Mechanical Cooling
> 54,000 BTU
Not just Packaged Units
Mandatory Requirements
110.12 Demand Management
New Section to Code
HVAC
Some Rooms
+ / - 4 deg F
Lighting
Above 10,000 sf
15% LPD reduction
Mandatory Requirements
Shall Be Capable of
5 tons
(65,000 BTU)
60 tons
(760,000 BTU)
11.4
IEER
12.9
IEER
9.8
IEER
11.2
IEER
2016 2019
110.2 Equipment Efficiencies are Going Up
Equipment Efficiency Rating
No change in EER
No change in EER
Mandatory Requirements
“Variable Speed
compressors & Evaporative
Condensing Units can get up
to 16.9 IEER.”
“Some rooftop
unit configurations are
as high as 13.6 EER.”
140.4 HVAC Changes
Cooling Towers
https://spxcooling.com/coolingtowers
Prescriptive Requirements
140.4 HVAC Changes
Cooling Towers
Was 40 gpm/hp
Prescriptive Requirements
140.4 HVAC Changes
Cooling Towers
Was 40 gpm/hp
Now 60 gpm/hp
(tried for 80 gpm/hp)
Slightly larger tower
size.
This is the same impact as
picking a ‘low approach’ tower.
5 deg to 6 deg F approach tower
vs typical 8 to 10 deg F.
Prescriptive Requirements
140.4 HVAC Changes (New Section)
(o) Exhaust System Transfer Air
Shall Not Exceed:
1. Supply for Heating /
Cooling
2. Allowed Ventilation
Rate
3. Exhaust Total –
Transferred Air
Prescriptive Requirements
140.4 HVAC Changes
Fan Power New Formula
Prescriptive Requirements
Previously T24, 2016
Total hp > 25 hp had a limited
W/cfm
Now for T24, 2019,
Total hp > 5 hp has a limited
W/cfm
Adopting
ASHRAE
90.1 2016
Pressure
Credit
Method
140.4 HVAC Changes
Fan Power New Formula
Adopting ASHRAE 90.1 2016
Pressure Credit Method
Prescriptive Requirements
Option 1
Option 2
140.4 HVAC Changes
Fan Power New Formula
Constant
Volume
Fans
Variable
Volume
Fans
< 0.82 W/cfm < 1.2 W/cfmOption 1
Rated size
Option 2
Rated power
< 0.70 W/cfm +A < 0.97 W/cfm +A
hp < cfm x 0.0011 hp < cfm x 0.0015
bhp < cfm x 0.00094 + A bhp < cfm x 0.0013 + A
Prescriptive Requirements
140.4 HVAC Changes
Fan Power New Formula
Constant
Volume
Fans
Variable
Volume
Fans
< 0.82 W/cfm
< 4.3 inches TSP*
< 1.2 W/cfm
< 5.9 inches TSP*
hp < cfm x 0.0011 hp < cfm x 0.0015
bhp < cfm x 0.00094 + A bhp < cfm x 0.0013 + A
< 0.70 W/cfm +A
< 4 inches TSP* +A
< 0.97 W/cfm +A
< 5.5 inches TSP* +A
*assuming 60% for fan efficiency
Prescriptive Requirements
Option 1
Rated size
Option 2
Rated power
Adjustment Credits (A)
Option 2
Rated Power
bhp < cfm x 0.00094 + A bhp < cfm x 0.0013 + A
< 0.70 W/cfm +A
< 4 inches TSP* +A
< 0.97 W/cfm +A
< 5.5 inches TSP* +A
140.4 HVAC Changes
Fan Power New Formula
Variable Volume Fan
< 5.5 inches TSP
+ Fully Ducted Return
< 5.5+0.5 inches TSP
+ Energy Recovery
Ventilator at 65%
effective
< 5.5+0.5+1.0 inches TSP
Prescriptive Requirements
Option 2
Rated Power
140.5 Hot Water Heating
Exception ADDED for 8 stories and above
for requiring solar hot water.
Compliance Change
140.9 HVAC Process Changes
Laboratory Variable Flow Fumehoods
Prescriptive Requirements
140.9 HVAC Process Changes
Laboratory Stack Exhaust Fan Power
Prescriptive Requirements
140.9 HVAC Process Changes
Laboratory Stack Discharge Exhaust Fan Power
Maximum Pressure
Drop of
0.85 inches with air
treatment
0.65 inches without
Prescriptive Requirements
https://www.laboratoryequipment.com
140.9 HVAC Process Changes
Laboratory Stack Exhaust Fan Power
Prescriptive Requirements
Where will we find the gold in performance compliance?
140.6 Lighting Power Density
140.6 Lighting Power Density
Building Method new LPDs
Most Building
LPDs are
Reducing
Lighting by
20% to 40%
Prescriptive Requirements
140.6 Lighting Power Density
Building Area Method new LPDs
140.6 Lighting Power Density
Building Area Method new LPDs
Lower
General
Lighting
(New)
Task
Lighting
(Additional
lighting)
https://www.slideshare.net/AZMAT0/lighting-systems-and-their-designmau-jmi2014
140.6 Lighting Controls
Credit for Daylighting Architectural Features
Mandatory HVAC Changes
1. Higher Filtration
2. Balanced Ventilation Multi-Family
3. Commercial Ventilation Calculation
4. Natural Ventilation / Exhaust Rates / DCV & Occ Control
5. Fault Detection for All
6. Equipment Efficiency
7. Demand Management
Prescriptive HVAC Changes
1. Cooling Tower
2. Fan Power Formula
3. Exhaust Transfer Air
4. Solar Hot Water
Lighting Changes
Process Systems
a) Variable Fumehoods Control
b) Stack Exhaust Fan Power
Topics Included Today
Questions
Title 24 2019 – Your Greatest
Ideas Turned Into Codes
Neil Bulger, PE
Red Car Analytics
neil@redcaranalytics.com
www.redcaranalytics.com
4460 Chico Ave.
Santa Rosa, California 95407

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Title 24 2019 Part 6 - Your Greatest Ideas Turned Into Code Change

  • 1. Title 24 2019 – Your Greatest Ideas Turned Into Codes 02.04.2019 Neil Bulger, PE Red Car Analytics 4460 Chico Ave. Santa Rosa, California 95407
  • 2.
  • 3.
  • 4.
  • 5. Big Bold Goals in 2011
  • 6. Residential Code Change (NET ZERO 2020!?#$#!) Commercial Code Change (NET ZERO 2030)
  • 7. Commercial Building (Non-Res) When 2019 Code Change Advocacy Starts Code is Law 2020
  • 8. Information Is Online (As of 4/23/2018) https://www.energy.ca.gov/title24/2019standards/rulemaking/doc uments/2018-05-09_hearing/2019_Revised_EnergyCode.php
  • 9. Mandatory HVAC Changes 1. Higher Filtration 2. Balanced Ventilation Multi-Family 3. Commercial Ventilation Calculation 4. Natural Ventilation / Exhaust Rates / DCV & Occ Control 5. Fault Detection for All 6. Equipment Efficiency 7. Demand Management Prescriptive HVAC Changes 1. Cooling Tower 2. Fan Power Formula 3. Exhaust Transfer Air 4. Solar Hot Water Lighting Changes Process Systems a) Variable Fumehoods Control b) Stack Exhaust Fan Power Topics Included Today
  • 10. Mandatory Requirements 120.1 Ventilation and Indoor Air Quality MERV 13 filters required Multifamily HVAC Systems All Non-Res HVAC Systems
  • 11.
  • 12. Mandatory Requirements 120.1 Ventilation and Indoor Air Quality Balanced Ventilation Systems Multifamily Buildings Pnnl.gov basc.pnnl.gov/resource-guides/whole-building-delivered-ventilation
  • 13. • Exhaust only is most common. • Not very effective ventilation. • Air comes from where? • Cannot filter the air. • It is low cost. • It was standard when buildings were leaky and had low exhaust rates.
  • 14. 120.1 Ventilation and Indoor Air Quality Mandatory Requirements New Ventilation Equation Nonresidential Title 24 2019 Semi-Simple Method Space Types & Names
  • 15. For ventilation quantities, all spaces covered by part 6 (ENERGY CODE) take precedence over part 4 (MECH CODE).
  • 16. 120.1 Ventilation and Indoor Air Quality Mandatory Requirements New Ventilation Equation Nonresidential Simple Formulas Vz = Rp x Pz Vent = 15 cfm/person x People Vz = Ra x Az Vent = xx cfm/sf_type x Area OR Greater of the two equations
  • 17. Space Types & Names 120.1 Ventilation and Indoor Air Quality New Ventilation Equation Nonresidential Unique airflow rates for California Unique airflow rates for California
  • 18. Exhaust cfm/sf Supply cfm/sf [3] Supply cfm/sf [2] Supply cfm/sf [1] 120.1 Ventilation and Indoor Air Quality 2016 Nonresidential Aiflow/Area table 2019 Nonresidential Aiflow/Area table
  • 19. 120.1 Ventilation and Indoor Air Quality Mandatory Requirements New Ventilation Equation Nonresidential Simple Formulas Vz = Rp x Pz Vent = 15 cfm/person x People Vz = Ra x Az Vent = xx cfm/sf_type x Area OR Vent = 0.15 cfm/sf_type* x Area The Demand Control Ventilation lower limit *most spaces
  • 20. 120.1 Ventilation and Indoor Air Quality Mandatory Requirements New Ventilation Equation Nonresidential Simple Formulas Ventilation in Commercial Buildings will Increase In Most Cases
  • 21. 120.1 Ventilation and Indoor Air Quality Required Demand Control Ventilation Required for All Spaces Greater than: 25 people per 1000 sq ft (or, less than: 40 square feet / person)
  • 22. 120.1 Ventilation and Indoor Air Quality Occupancy Sensing Zone Controls Mandatory Requirements All Spaces that require Lighting Shut-Off Controls shall require ventilation controls to go to ZERO for allowable space types. Office Space Corridor Multipurpose Assembly Classrooms Conference Rooms
  • 23. 120.1 Ventilation and Indoor Air Quality Filtration Ventilation Air Exhaust Air New Formula Semi-Same cfm/sf or cfm/person New Table cfm/sf MERV 13 Demand Control Vent (CO2) Occ Sensing Control Vent
  • 24. 120.1 Ventilation and Indoor Air Quality Natural Ventilation Nonresidential 1. Single Sided Opening 2. Double Sided Opening 3. Corner Opening Openable area shall be not less than 4 percent of the net occupiable floor area. 225 sf office x 4% = 9 sqft Mandatory Requirements
  • 25. 120.2 Economizer Fault Detection Diagnostics (FDD) http://www.automatedbuildings.com/news/feb13/ articles/adms/130121113909adms.html Required for All Air Handling Units with Mechanical Cooling > 54,000 BTU Not just Packaged Units Mandatory Requirements
  • 26. 110.12 Demand Management New Section to Code HVAC Some Rooms + / - 4 deg F Lighting Above 10,000 sf 15% LPD reduction Mandatory Requirements Shall Be Capable of
  • 27. 5 tons (65,000 BTU) 60 tons (760,000 BTU) 11.4 IEER 12.9 IEER 9.8 IEER 11.2 IEER 2016 2019 110.2 Equipment Efficiencies are Going Up Equipment Efficiency Rating No change in EER No change in EER Mandatory Requirements
  • 28. “Variable Speed compressors & Evaporative Condensing Units can get up to 16.9 IEER.” “Some rooftop unit configurations are as high as 13.6 EER.”
  • 29. 140.4 HVAC Changes Cooling Towers https://spxcooling.com/coolingtowers Prescriptive Requirements
  • 30. 140.4 HVAC Changes Cooling Towers Was 40 gpm/hp Prescriptive Requirements
  • 31. 140.4 HVAC Changes Cooling Towers Was 40 gpm/hp Now 60 gpm/hp (tried for 80 gpm/hp) Slightly larger tower size. This is the same impact as picking a ‘low approach’ tower. 5 deg to 6 deg F approach tower vs typical 8 to 10 deg F. Prescriptive Requirements
  • 32. 140.4 HVAC Changes (New Section) (o) Exhaust System Transfer Air Shall Not Exceed: 1. Supply for Heating / Cooling 2. Allowed Ventilation Rate 3. Exhaust Total – Transferred Air Prescriptive Requirements
  • 33. 140.4 HVAC Changes Fan Power New Formula Prescriptive Requirements Previously T24, 2016 Total hp > 25 hp had a limited W/cfm Now for T24, 2019, Total hp > 5 hp has a limited W/cfm Adopting ASHRAE 90.1 2016 Pressure Credit Method
  • 34. 140.4 HVAC Changes Fan Power New Formula Adopting ASHRAE 90.1 2016 Pressure Credit Method Prescriptive Requirements Option 1 Option 2
  • 35. 140.4 HVAC Changes Fan Power New Formula Constant Volume Fans Variable Volume Fans < 0.82 W/cfm < 1.2 W/cfmOption 1 Rated size Option 2 Rated power < 0.70 W/cfm +A < 0.97 W/cfm +A hp < cfm x 0.0011 hp < cfm x 0.0015 bhp < cfm x 0.00094 + A bhp < cfm x 0.0013 + A Prescriptive Requirements
  • 36. 140.4 HVAC Changes Fan Power New Formula Constant Volume Fans Variable Volume Fans < 0.82 W/cfm < 4.3 inches TSP* < 1.2 W/cfm < 5.9 inches TSP* hp < cfm x 0.0011 hp < cfm x 0.0015 bhp < cfm x 0.00094 + A bhp < cfm x 0.0013 + A < 0.70 W/cfm +A < 4 inches TSP* +A < 0.97 W/cfm +A < 5.5 inches TSP* +A *assuming 60% for fan efficiency Prescriptive Requirements Option 1 Rated size Option 2 Rated power
  • 37. Adjustment Credits (A) Option 2 Rated Power bhp < cfm x 0.00094 + A bhp < cfm x 0.0013 + A < 0.70 W/cfm +A < 4 inches TSP* +A < 0.97 W/cfm +A < 5.5 inches TSP* +A
  • 38. 140.4 HVAC Changes Fan Power New Formula Variable Volume Fan < 5.5 inches TSP + Fully Ducted Return < 5.5+0.5 inches TSP + Energy Recovery Ventilator at 65% effective < 5.5+0.5+1.0 inches TSP Prescriptive Requirements Option 2 Rated Power
  • 39. 140.5 Hot Water Heating Exception ADDED for 8 stories and above for requiring solar hot water. Compliance Change
  • 40. 140.9 HVAC Process Changes Laboratory Variable Flow Fumehoods Prescriptive Requirements
  • 41.
  • 42.
  • 43. 140.9 HVAC Process Changes Laboratory Stack Exhaust Fan Power Prescriptive Requirements
  • 44. 140.9 HVAC Process Changes Laboratory Stack Discharge Exhaust Fan Power Maximum Pressure Drop of 0.85 inches with air treatment 0.65 inches without Prescriptive Requirements
  • 45. https://www.laboratoryequipment.com 140.9 HVAC Process Changes Laboratory Stack Exhaust Fan Power Prescriptive Requirements
  • 46. Where will we find the gold in performance compliance? 140.6 Lighting Power Density
  • 47. 140.6 Lighting Power Density Building Method new LPDs Most Building LPDs are Reducing Lighting by 20% to 40% Prescriptive Requirements
  • 48. 140.6 Lighting Power Density Building Area Method new LPDs
  • 49. 140.6 Lighting Power Density Building Area Method new LPDs Lower General Lighting (New) Task Lighting (Additional lighting)
  • 51. 140.6 Lighting Controls Credit for Daylighting Architectural Features
  • 52.
  • 53.
  • 54.
  • 55. Mandatory HVAC Changes 1. Higher Filtration 2. Balanced Ventilation Multi-Family 3. Commercial Ventilation Calculation 4. Natural Ventilation / Exhaust Rates / DCV & Occ Control 5. Fault Detection for All 6. Equipment Efficiency 7. Demand Management Prescriptive HVAC Changes 1. Cooling Tower 2. Fan Power Formula 3. Exhaust Transfer Air 4. Solar Hot Water Lighting Changes Process Systems a) Variable Fumehoods Control b) Stack Exhaust Fan Power Topics Included Today
  • 56.
  • 57. Questions Title 24 2019 – Your Greatest Ideas Turned Into Codes Neil Bulger, PE Red Car Analytics neil@redcaranalytics.com www.redcaranalytics.com 4460 Chico Ave. Santa Rosa, California 95407