This standard applies to newly produced, gas-fired low-intensity infrared heaters and infrared radiant tube heaters (see Part IV, Definitions), hereinafter referred to as heaters or appliances, constructed entirely of new, unused parts and materials with inputs up to and including 400 000 Btu/hr (1 1 7.23 kW) per burner:
a. For use with natural gas;
b. For use with manufactured gas;
c. For use with mixed gas;
d. For use with liquefied petroleum (propane) gases;
e. For use with LP gas-air mixtures; and
f. Convertible for use with natural gas and liquefied petroleum (propane) gases, when provision is made for the simple conversion from one gas to the other.
