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Federal Register / Vol. 86, No. 223 / Tuesday, November 23, 2021 / Rules and Regulations
sub-types of unvented heaters at 10 CFR
430.2 as follows:
1 Baseboard electric heater means an electric heater which is intended to be recessed in or surface mounted on walls at floor level, which is characterized by long, low physical dimensions, and which transfers heat by natural convection and/or radiation.
2 Ceiling electric heater means an electric heater which is intended to be recessed in, surface mounted on, or hung from a ceiling, and which transfers heat by radiation and/or convection either natural or forced.
3 Electric heater means an electric appliance in which heat is generated from electrical energy and dissipated by convection and radiation and includes baseboard electric heaters, ceiling electric heaters, floor electric heaters, portable electric heaters, and wall electric heaters.
4 Floor electric heater means an electric heater which is intended to be recessed in a floor, and which transfers by radiation and/or convection either natural or forced.
5 Portable electric heater means an electric heater which is intended to stand unsupported, and can be moved from place to place within a structure. It is connected to electric supply by means of a cord and plug, and transfers heat by radiation and/or convention either natural or forced.
6 Primary heater means a heating device that is the principal source of heat for a structure and includes baseboard electric heaters, ceiling electric heaters, and wall electric heaters.
7 Supplementary heater means a heating device that provides heat to a space in addition to that which is supplied by a primary heater. Supplementary heaters include portable electric heaters.
8 Unvented gas heater means an unvented, self-contained, free-standing, nonrecessed gas-burning appliance which furnishes warm air by gravity or fan circulation.

9 Unvented oil heater means an unvented, self-contained, free-standing, nonrecessed oil-burning appliance which furnishes warm air by gravity or fan circulation.
10 Wall electric heater means an electric heater excluding baseboard electric heaters which is intended to be recessed in or surface mounted on walls, which transfers heat by radiation and/or convection either natural or forced and which includes forced convectors, natural convectors, radiant heaters, high wall or valance heaters.

DOE received no recommended changes to the unvented heater definitions in response to the December 2020 NOPD and is not amending these definitions in this final determination.
b. Vented Heaters Vented heaters are those products that meet the definitions for vented home heating equipment, as codified at 10
CFR 430.2. Under that provision, vented home heating equipment or vented heater means a class of home heating equipment, not including furnaces, designed to furnish warmed air to the living space of a residence, directly from the device, without duct connections except that boots not to exceed 10 inches beyond the casing may be permitted and includes: Vented wall furnace, vented floor furnace, and vented room heater. DOE further defines the various sub-types of vented heaters at 10 CFR 430.2 as follows:
1 Vented floor furnace means a selfcontained vented heater suspended from the floor of the space being heated, taking air for combustion from outside this space. The vented floor furnace supplies heated air circulated by gravity or by a fan directly into the space to be heated through openings in the casing.

2 Vented room heater means a selfcontained, free standing, non-recessed, vented heater for furnishing warmed air to the space in which it is installed. The vented room heater supplies heated air circulated by gravity or by a fan directly into the space to be heated through openings in the casing.
3 Vented wall furnace means a selfcontained vented heater complete with grilles or the equivalent, designed for incorporation in, or permanent attachment to, a wall of a residence and furnishing heated air circulated by gravity or by a fan directly into the space to be heated through openings in the casing.

DOE received no recommended changes to the vented heater definitions in response to the December 2020 NOPD
and is not amending these definitions in this final determination.
2. Product Classes In general, when evaluating and establishing energy conservation standards, DOE divides the covered product into classes or types based on the level of energy used, the capacity, or other performance-related feature that justifies a different standard. 42 U.S.C.
6295q In making a determination whether capacity or another performance-related feature justifies a different standard, DOE must consider such factors as the utility of the feature to the consumer and other factors DOE
deems appropriate. Id.
For vented heaters, the current energy conservation standards specified in 10
CFR 430.32i2 are based on 11
product classes divided by DHE type i.e., gas wall, gas floor, or gas room, heat circulation type i.e., fan type or gravity type, and input capacity. Table III.2 lists the current product classes for vented heaters.

TABLE III.2CURRENT VENTED HEATER PRODUCT CLASSES
DHE type
Heat circulation type
Input rate, Btu/h
Gas Wall

Fan Type

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Gravity Type
Gas Floor

All

Gas Room

All

In response to the December 2020
NOPD, NEEA stated that gas wall gravity type vented heaters do not provide a unique consumer utility and therefore do not warrant a separate product class from gas wall fan type vented heaters. NEEA, No. 20 at p. 2

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NEEA further stated that although some gas wall gravity type vented heaters do not require electricity, while all gas wall fan type vented heaters do, this is not a distinguishing factor since some gas wall gravity type vented heater models require electricity to operate. NEEA,
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42,000.
>42,000.
27,000.
>27,000 and 46,000.
>46,000.
37,000.
>37,000.
20,000.
>20,000 and 27,000.
>27,000 and 46,000.
>46,000.

No. 20 at p. 2 Gas wall fan and gravity type vented heaters are separated into different product classes in the current energy conservation standards. As discussed, EPCA requires DOE to consider product classes when prescribing energy conservation
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