scope:

This standard applies to propane and natural gasflred unattended portable type infra-red geaters (see Definitions, Par: III), hereinafter referred to as heaters with gas inputs up to and including 400 000 Btuh (117.23 kW).

The standard applies to portable unvented infrared heaters used primarily for temporary heating purposes.

Portable type unvented infra-red heaters which comply with these provisions shall not be acceptable if they have features which impair the results contemplated by the provisions.