scope:

This standard applies to newly produced direct fired construction heaters, hereinafter referred to as heaters or appliances, constructed entirely of new, unused parts and materials and primarily intended for temporary use in heating buildings or structures under construction, alteration or repair. All the products of combustion generated by the heater are released into the area being heated. The requirements of this standard cover heaters with rated inputs up to and including 10,000,000 Btu/h (2930 kW).

This standard applies to self-contained heaters with or without integral means for air circulation and not intended for connection to ducts. It shall also apply to forced draft, fan equipped, heaters connected to duct systems supplied by the manufacturer.

This standard does not apply to heaters employing a flameless catalytic combustion process or heaters for use with liquid phase fuel gases.

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

Exhibit C contains a list of standards specifically referenced in this standard, and sources from which these reference standards may be obtained.

The standard applies to heaters using the following fuels:

a. Natural gas; and

b. Propane.

Accessories. All accessories intended for use with appliances certified to the standard shall be tested to this standard on the appliance on which they may be used.

Exhibit A contains items unique to the Canada.

Exhibit B contains items unique to the U.S.

All references to psi through this standard are to be considered gage pressure unless otherwise specified.