ANSI Z21.50-2007/CSA 2.22-2007 (R2012)

1.1 Scope 1.1.1 This standard applies to newly produced vented gas fireplaces (See Part IV, Definitions), hereinafter referred to as appliances, constructed entirely of new, unused parts and materials, and having input ratings up to and including 400,000 Btu/hr (117 228 W). These appliances are: a. For use with natural gas; b. For use with propane; c. For direct vent gas appliances for manufactured home (USA only) or mobile home OEM installation or aftermarket installation 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 1.2.21 and 1.2.22); d. For direct vent gas appliances for manufactured home (USA only) or mobile home aftermarket installation for use with natural gas only or liquified petroleum (propane) gases only (see 1.2.22); and e. For direct vent gas appliances for manufactured home (USA only) or mobile home OEM installation for use with liquified petroleum (propane) gases only (see 1.2.21). The construction of vented gas fireplaces for use with the above mentioned gases is covered under Part I, Construction. The performance of vented gas fireplaces for use with the above mentioned gases is covered under Part II, Performance. 1.1.2 Exhibit D.1, Automatic Intermittent Pilot Ignition Systems for Field Installation, 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. 1.1.3 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. 1.1.4 Exhibit H, List of Reference Standards, contains a list of standards specifically referenced in this Standard, and sources from which they may be obtained. Exhibit H includes both the U.S. and Canadian referenced standards, where applicable. It is the responsibility of the user of this standard to determine which referenced standard applies based on the requirements of the authority having jurisdiction for the location of installation. 1.1.5 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. 1.1.6 All references to psi throughout this standard are to be considered gage pressure unless otherwise specified. 1.1.7 Special construction provisions applicable to vented gas fireplace heaters designed for use with an optional design-certified conversion kit are outlined under Exhibit G, (Optional) Provisions for Listed Gas Appliance Conversion Kits.