scope:

This standard applies to newly produced vented gas fireplace heaters (see Part IV, Definitions), hereinafter referred to as appliance(s), constructed entirely of new, unused parts and materials, and having input ratings up to and including 400,000 Btu/hr.

a. For use with natural gas;

b. For use with liquified petroleum (propane);

c. Direct vent appliances for manufactured home (USA only) or mobile home OEM installation convertible for use with natural gas and propane when provision is made for simple conversion from one gas to the other (see 1.2.4-a and -b);

d. Direct vent appliances for manufactured home (USA only) or mobile home aftermarket installation for use with natural gas only or liquified petroleum (propane) gases only (see 1.2.4-b.);

e. Direct vent appliances for recreational vehicle installation for use with liquified petroleum (propane) gases only (see 1.2.4-c);

f. Direct vent appliances for recreational vehicle installation only convertible for use with natural gas and liquified petroleum (propane) gases when provision is made for the simple conversion from one gas to the other (see 1.2.4-c); and

g. For direct vent appliances for manufactured home (USA only) or mobile home OEM installation for use with liquified petroleum (propane) gases only (see 1.2.4-a).

The construction of vented gas fireplace heaters and vented gas fireplace heaters with cooling units for use with the above-mentioned gases is covered under Part I, Construction.

The performance of vented gas fireplace heaters and vented gas fireplace heaters with cooling units for use with the above-mentioned gases is covered under Part II, Performance.

Exhibit A.1, Automatic Intermittent Pilot Ignition Systems for Field Installation and Exhibit A.2, Recommended Procedure for Safety Inspection of the Existing Appliance Installation as a Preliminary Step to Field Installing the Automatic Intermittent Pilot Ignition System, includes provisions for newly produced (optional) automatic intermittent pilot ignition systems (see Part IV, Definitions), constructed entirely of new, unused parts and materials, to be adapted in the field to an appliance equipped with an existing continuous pilot burner and which has been examined and tested for compliance with this Standard when installed on the appliance.

If a value for measurement given in this standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.

Appliances covered by this standard, except for those installed in recreational vehicles, are those whose efficiencies are regulated in the United States by the Energy Policy and Conservation Act of 1975 and the National Energy Conservation Policy Act of 1978* or covered in Canada by Exhibit B, Items Unique to Canada.

Exhibit B, Items Unique to Canada, contains provisions that are unique to Canada.

Exhibit C, Items Unique to the United States, contains provisions that are unique to the United States.

This standard also applies to appliances with draft hoods which are factory equipped with automatic vent damper devices (See Part IV, Definitions), hereinafter referred to as vent damper devices.

Special construction provisions applicable to vented gas fireplace heaters designed for use with an optional design-certified conversion kit are outlined under Exhibit D, (Optional) Provisions for Listed Gas Appliance Conversion Kits.

Exhibit E, List of Reference Standards, contains a list of standards specifically referenced in this standard, and sources from which they may be obtained.