N.Y. Comp. Codes R. & Regs. tit. 21, § 458.2
(a) Definitions. The following words and phrases as used in this Part shall have the following meanings, unless a different meaning is plainly required by the context:
(b) Standards for existing dwellings. Existing residential dwellings converting to electric heat shall meet the following requirements:
(1) Minimum insulation standards shall be as follows:
(i) The maximum coefficient of heat transmission, U-value, through roof and ceiling assemblies adjacent to heated space shall be as follows:
| Heating degree days | U-value |
|---|---|
| 5,000 | 0.05 |
| 6,000 | 0.04 |
| 7,000 | 0.04 |
| 8,000 | 0.03 |
| 9,000 | 0.03 |
The degree days to be used to determine the required U-value shall be those in Table 1.
(2) Minimum heating systems standards shall be as follows:
(i) For systems using baseboard radiation, one of the following control methods is required:
(ii) For the conversion from a fossil-fueled hydronic heating system to electric heat, the following is required:
(c) One of the following control methods is required:
(iii) For the installation of an electric resistance warm air system or the conversion of a fossil-fueled warm air heating system to electric resistance heat, the following is required:
(c) Standards for existing commercial buildings. Existing commercial buildings converting to electric heat shall meet the following requirements:
(1) Minimum insulation standards shall be as follows:
(i) The maximum combined thermal transmittance value for exterior wall systems, Uo as calculated using Equation 1 shall be as follows:
| Heating degree days | Uo |
|---|---|
| 5,000 | 0.36 |
| 6,000 | 0.33 |
| 7,000 | 0.31 |
| 8,000 | 0.28 |
| 9,000 | 0.28 |
The degree days to be used to determine U o shall be those listed in Table 1.
(ii) The maximum coefficient of heat transmission, U-value, for roof and ceiling assemblies adjacent to heated space shall be as follows:
| Heating degree days | U-value |
|---|---|
| 5,000 | 0.08 |
| 6,000 | 0.08 |
| 7,000 | 0.07 |
| 8,000 | 0.06 |
| 9,000 | 0.06 |
The degree days to be used to determine U-value shall be those in Table 1.
(2) Minimum heating system standards shall be as follows:
(ii) One of the following control methods is required:
(iii) For the conversion from a fossil-fueled hydronic heating system to electric heat, the following is required:
(iv) Where electric heating is to be used for zone temperature control in heating, ventilating and air conditioning (HVAC) systems, the following control methods are required:
(3) In unusual circumstances, when the application of these provisions appears impractical or inequitable, the utility or applicant will refer the matter to the Power Authority for special ruling or for the approval of special conditions which may be mutually agreed upon. The applicant will submit, along with the request for special ruling or for the approval of special conditions, a copy of an energy audit performed on the building by a registered architect or professional engineer.
(d) Standards for mobile homes.
Existing mobile homes converting to electric heat (built prior to the effective date of the Department of Housing and Urban Development (HUD) “Mobile Home Construction and Safety Standards”), shall meet the following requirements:
(2) entrance doors U = 0.40
Unusual circumstances. In unusual circumstances when the application of these standards appears impracticable or inequitable, the utility or applicant will refer the matter to the Power Authority for special ruling or for the approval of special conditions which may be mutually agreed upon.
(e) Effective date.
The standards specified herein shall be effective on and after September 1, 1981 as a precondition for the expansion of existing electric service for the purpose of providing electric heat to all existing buildings and to existing mobile homes not subject to HUD “Mobile Home Construction and Safety Standards”.
(f) Relationship to other standards.
The requirements imposed by these standards represent the minimum standards for existing buildings and mobile homes for which utilities may provide electric service. However, some utilities may require a greater degree of thermal protection than these standards impose. These standards, are not intended to supersede more stringent municipal requirements or standards nor are they intended in any way to contravene the State Energy Conservation Construction Code Act. The thermal protection for mobile homes is controlled by the Department of Housing and Urban Development “Mobile Home Construction and Safety Standards”. In accordance with the Housing and Community Development Act of 1974, Title VI (cited as the National Mobile Home Construction and Safety Standards Act of 1974), the Federal standards take precedence over all State or local standards.
(g) Certificate of compliance.
A form of certificate of compliance, included as Appendix 10-B of this Title, shall be provided to the builder or contractor when the builder/contractor first contacts the utility concerning electrical service for conversion to electric heat of existing buildings or of existing mobile homes covered by these standards. The applicable form shall be completed before the utility supplies permanent new or expanded electric service. In addition, an inspection of the premises by an employee of the municipal electric department, building code enforcement inspector, or qualified representative of the municipal government is required to verify compliance with these standards.
TABLE 1
HEATING DEGREE DAYS—NEW YORK STATE
(For use in selecting required U-values)
| Counties | Degree days |
|---|---|
| Albany | 7,000 |
| Allegany | 7,000 |
| Bronx | 5,000 |
| Broome | 7,000 |
| Cattaraugus | 7,000 |
| Cayuga | 7,000 |
| Chautauqua | 7,000 |
| Chemung | 7,000 |
| Chenango | 8,000 |
| Clinton | 8,000 |
| Columbia | 7,000 |
| Cortland | 8,000 |
| Delaware | 7,000 |
| Dutchess | 7,000 |
| Erie | 7,000 |
| Essex | 9,000 |
| Franklin | 8,000 |
| Fulton | 8,000 |
| Genesee | 7,000 |
| Greene | 7,000 |
| Hamilton | 9,000 |
| Herkimer (Adirondack | N. 9,000 |
| Park Boundary) | S. 8,000 |
| Jefferson | 7,000 |
| Kings | 5,000 |
| Lewis | 8,000 |
| Livingston | 7,000 |
| Madison | 8,000 |
| Monroe | 7,000 |
| Montgomery | 7,000 |
| Nassau | 5,000 |
| New York | 5,000 |
| Niagara | 7,000 |
| Oneida | 8,000 |
| Onondaga | 7,000 |
| Ontario | 7,000 |
| Orange | 6,000 |
| Orleans | 7,000 |
| Oswego | 7,000 |
| Otsego | 8,000 |
| Putnam | 6,000 |
| Queens | 5,000 |
| Rensselaer | 7,000 |
| Richmond | 5,000 |
| Rockland | 6,000 |
| St. Lawrence | 8,000 |
| Saratoga | 7,000 |
| Schenectady | 7,000 |
| Schoharie | 7,000 |
| Schuyler | 7,000 |
| Seneca | 7,000 |
| Steuben | 7,000 |
| Suffolk | 6,000 |
| Sullivan | 7,000 |
| Tioga | 7,000 |
| Tompkins | 7,000 |
| Ulster | 7,000 |
| Warren | 9,000 |
| Washington | 9,000 |
| Wayne | 7,000 |
| Westchester | 6,000 |
| Wyoming | 7,000 |
| Yates | 6,000 |
EQUATION 1
Uo = UwAw + UgAg + UdAd. . ./Ao
Where:
Uo = the average or combined transmittance of the gross exterior wall area in Btu/hr/sq ft/°F.
Ao = the gross exterior wall assembly area in square feet.
Uw = the coefficient of heat transmission of the components of the opaque wall area in square feet.
Aw = opaque wall area in square feet.
Ug = the coefficient of heat transmission of the glazing area. The Ug of glazing shall be the average value of the window, including frames and glazing areas.
Ag = glazing area (shall be the area of the finished opening), in square feet.
Ud = the coefficient of heat transmission of the door, or similar opening.
Ad = door area (shall be the area of the finished opening), in square feet.
Note:
Where more than one type of wall, window or door is used, the U and A terms for those items shall be expanded into subelements as:
Uw1Aw1 + Uw2Aw2 + Uw3Aw3 + etc.