New York Codes, Rules and Regulations
Title 21 - Miscellaneous
Chapter XI - New York State Energy Research And Development Authority
Part 508 - Green Residential Building Program
Section 508.5 - Additional requirements for residential buildings of not more than three stories, containing four or fewer dwelling units: energy efficiency specifications and performance specifications
Current through Register Vol. 46, No. 12, March 20, 2024
A residential building of not more than three stories, containing four or fewer dwelling units, shall meet or exceed:
(a) the following energy efficiency specifications:
Table 4: Minimum Efficiency Requirements for Ceiling Fans
Fan Speed |
Minimum Airflow |
Efficiency Requirement |
Low | 1,250 cubic feet per minute | 155 cubic feet per minute/watt |
Medium | 3,000 cubic feet per minute | 100 cubic feet per minute/watt |
High | 5,000 cubic feet per minute | 75 cubic feet per minute/watt |
Table 5: Minimum Efficiency Levels for Central Air Conditioners
Type |
Minimum Efficiency |
Test Procedure for Determining Efficiency Level |
Central Air Conditioner (split system) | 14.5 SEERa/ 12 EERb | ANSIc / AHRId 210/240-2008 |
Central Air Conditioner (single package system) | 14.5 SEERa/ 11 EERb | ANSIc / AHRId 210/240-2008 |
a SEER (Seasonal Energy Efficiency Ratio) means the total cooling output of a central air conditioner in Btus during its normal annual usage period for cooling divided by the total electric energy input in watt-hours during the same period
b EER (Energy Efficiency Ratio) means the ratio of net cooling capacity in Btus per hour to the total rate of electric input in watts, under designated operating conditions
c ANSI means the American National Standards Institute
d AHRI means the Air-Conditioning, Heating, and Refrigeration Institute (formerly ARI)
Table 6: Minimum Energy Factors for Domestic Water Heaters
Rated Storage Capacity (in gallons |
Minimum EFa for Natural Gas or Propane Water Heaters |
Minimum EF for Electric Water Heaters |
30 | 0.62 | 0.94 |
40 | 0.62 | 0.93 |
50 | 0.62 | 0.92 |
75 | 0.54 | 0.90 |
100 | 0.49 | 0.87 |
Natural Gas Tankless Water Heaters | 0.82 |
a EF (Energy Factor) means the ratio of useful energy output from a domestic water heater to the total amount of energy delivered to the domestic water heater.
Table 7: Minimum Efficiency Levels for Primary Residential Heating Systems
Type |
Minimum Efficiency |
Test Procedure for Determining Efficiency Level |
Furnace-Natural Gas | AFUEa 92% | 10 CFR 430, Appendix N |
Furnace-Fuel Oil | AFUEa 85% | 10 CFR 430, Appendix N |
Boiler-Hot Water or Steam | AFUEa 85% | 10 CFR 430 |
Air-Source Heat Pump-Split System | 14.5 SEERb/12 EERe/8.2 HSPFf | ANSIc/AHRId 210/240-2008 |
Air-Source Heat Pump-Single Package | 14 SEERb/11 EERe/8.0 HSPFf | ANSIc/AHRId 210/240-2008 |
Ground Source Heat Pump-Closed Loop | 14.1 EERe/3.3 COPh | ISOg 13256-1 |
Ground Source Heat Pump-Open Loop | 16.2 EERe/3.6 COPh | ISOg 13256-1 |
Ground Source Heat Pump-Direct Expansion | 15 EERe/3.5 COPh | ANSIc/AHRId 870-2005 |
Combination Water/Space Heater | 0.73 CAEi | ANSIe/ASHRAEj 124-1991 |
a AFUE (Annual Fuel Utilization Efficiency) means the ratio of annual output energy to annual input energy which includes any non-heating season pilot input loss, and for gas or oil-fired furnaces or boilers, does not include electrical energy.
b SEER (Seasonal Energy Efficiency Ratio) means the total cooling output of a central air conditioner in Btus during its normal annual usage period for cooling divided by the total electric energy input in watt-hours during the same period
c ANSI means the American National Standards Institute
d AHRI means the Air-Conditioning, Heating, and Refrigeration Institute (formerly ARI)
e EER (Energy Efficiency Ratio) means the ratio of net cooling capacity in Btus per hour to the total rate of electric input in watts, under designated operating conditions
f HSPF (Heating Seasonal Performance Factor) means the total heating output of a heat pump during its normal annual usage period for heating divided by the total electric energy input during the same period
g ISO means the International Organization for Standardization
h COP (Coefficient of Performance) means a unitless ratio of the rate of heat removal or heat delivery to the rate of energy input, in consistent units, for a complete refrigerating or heat pump system under designated operating conditions
i CAE (Combined Annual Efficiency) means the overall efficiency of a heating system in providing both space heating and water heating in KBtu/h
j ASHRAE means the American Society of Heating, Refrigerating, and Air-Conditioning Engineers
Table 8: Minimum Efficiency Requirements for Ventilation Fans Using Home Ventilating Institute Publications 915, 916 and 920 Test Criteria for Ventilation Fans
Product |
Airflow |
Efficiency Requirement |
Range Hoods | Up to 500 cubic feet per minute (max) | 2.8 cubic feet per minute/watt |
Bathroom and Utility Room Fans | 10-80 cubic feet per minute | 1.4 cubic feet per minute/watt |
Bathroom and Utility Fans | 90-130 cubic feet per minute | 2.8 cubic feet per minute/watt |
Bathroom and Utility Fans | 140-500 cubic feet per minute (max) | 2.8 cubic feet per minute/watt |
In-Line Ventilating Fans | 2.8 cubic feet per minute/watt |
Table 9: Light Source Criteria for Combination Ventilation Fans
Performance Characteristic | Specification |
System Efficiency per lamp ballast combination, Lumens per Watt (LPW) | [GREATER THAN EQUAL TO] 46 LPW for all lamp types below 30 total listed lamp watts e 60 LPW for all lamp types that are d 24 inches and e 30 listed lamp watts e 70 LPW for all lamp types that are e 24 inches and e 30 listed lamp watts |
Maximum Total Lamp Wattage (excluding night lights) | [LESS THAN EQUAL TO] 50 Watts |
Maximum Night Light Wattage | [LESS THAN EQUAL TO] 4 Watts |
(b) A residential building of not more than three stories in height above grade, containing four or fewer dwelling units, shall have met or exceeded the following performance specifications:
Table 10: Minimum Ventilation Requirements Using ANSIa/ASHRAEb 62.2-2007
Minimum Ventilation Requirement (cubic feet per minute)
Square Footage |
<-- Number of Bedrooms --> |
|||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | ||
1000 | 25 | 33 | 40 | 48 | 55 | 63 | 70 | |
1001 | 1500 | 30 | 38 | 45 | 53 | 60 | 68 | 75 |
1501 | 2000 | 35 | 43 | 50 | 58 | 65 | 73 | 80 |
2001 | 2500 | 40 | 48 | 55 | 63 | 70 | 78 | 85 |
2501 | 3000 | 45 | 53 | 60 | 68 | 75 | 83 | 90 |
3001 | 3500 | 50 | 58 | 65 | 73 | 80 | 88 | 95 |
3501 | 4000 | 55 | 63 | 70 | 78 | 85 | 93 | 100 |
4001 | 4500 | 60 | 68 | 75 | 83 | 90 | 98 | 105 |
4501 | 5000 | 65 | 73 | 80 | 88 | 95 | 103 | 110 |
5001 | 5500 | 70 | 78 | 85 | 93 | 100 | 108 | 115 |
5501 | 6000 | 75 | 83 | 90 | 98 | 105 | 113 | 120 |
a ANSI means the American National Standards Institute
b ASHRAE means the American Society of Heating, Refrigerating, and Air-Conditioning Engineers