A-A-50549 Heaters, Water, Liquid Fuel Oil-Fired, Storage Type, not Exceeding 280,000 BTU/H Input CapacityThis 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.

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A-A-50549

TABLE IV.  Code number to size and minimum firing rate.

7.4  National Stock Numbers (NSNs).  The following is a list of NSNs assigned which correspond to this CID.  The list may not be indicative of all possible NSNs associated with the CID.

7.5  Classification cross reference.  Cross reference of classification changes between this CID (see 2.) and the superseded military specification MIL-H-16451F, is as follows:

MIL-H-16451                                              A-A-50549

Type IV                                                        Type I

Type VII                                                      Not included Type VIII                                                     Not included Type IX                                                        Type II

Type X                                                         Not included Type XI                                                        Not included Type XII                                                      Not included

7.6  Subject term (key word) listing.

Water heaters

Light oil-fired

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