1.1.1 This standard applies to newly produced gas-fired unvented room heaters for connection to the house fuel supply system (see Part IV, Definitions), hereinafter referred to as room heaters or appliances, constructed entirely of new, unused parts and materials, having input ratings up to and including 40,000 Btu per hour (11 723 W) except:
(a) Unvented room heaters suitable for installation in bedrooms shall have input ratings of 10,000 Btu per hour (2 931 W) or less; and
(b) Unvented room heaters suitable for installation in bathrooms shall have input ratings of 6,000 Btu per hour (1 758 W) or less.
Unvented room heaters are:
(a) For use with natural gas;
(b) For use with manufactured gas;
(c) For use with mixed gas;
(d) For use with liquefied petroleum gases; and
(e) For use with LP gas-air mixtures.
Unvented room heaters for installation in bedrooms or bathrooms shall be wall-mounted.
The construction of unvented room heaters for use with the above-mentioned gases is covered under Part I.
The performance of unvented room heaters for use with the above-mentioned gases is covered under Part II.
1.1.2 If a value for measurement as given in this standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.
1.1.3 All references to psi throughout this standard are to be considered gage pressure unless otherwise specified.
1.1.4 Exhibit D contains a list of standards referenced in this standard, and sources from which these reference standards may be obtained.