scope:

This commercial item description covers vertical, light-oil fired, storage-type water heaters having thermal inputs not exceeding 280,000 British thermal units per hour (Btu/h) (82,040 Watts (W)) and storage capacities up to 100 gallons (gal)(379 liters (L)) and constructed to Underwriters Laboratories, Inc. (UL) or American Society of Mechanical Engineers (ASME) requirements. Heaters are intended primarily for use in military residences and similar facilities. The heaters may be used in galleys, mess halls, showers, laundries, or shops where thermal input up to 280,000 Btu/h (82,040 W) will satisfy the demand.