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Type F-1A Utility Heater

DAYTON, Ohio -- Type F-1A utility heater displayed in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Type F-1A utility heater displayed in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo)


The Type F-1A heater, built by the Herman Nelsen Corp., is a World War II-era portable gasoline-powered unit designed to produce a steady flow of heated air. The Army Air Forces used it in cold climates to pre-heat aircraft and motor vehicle engines for easy starting, and to heat crew compartments, tents, hangars and other shelters. A small gasoline engine powers both a combustion chamber blower and an air distribution fan. The heated air is distributed by a system of flexible, collapsible ducts.

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