2540-15-135-4216

4520-01-443-8106 4520014438106 014438106 is a device capable of producing heat from gas, liquid fuel, or an electrical heating element designed for permanent installation in sheet metal ducts of a forced air circulating system. it consists of (1) a finned, steel burner tube, a combustion air blower, a control panel, and a constant level fuel supply system or (2) a device having a heating element which when connected to an electrical source, directly imparts heat. it may be provided with a flanged outer casing to facilitate mounting in planned or existing duct work. circulation of the heated air is achieved by use of a blower or fan not integral with the heating unit.

3930-99-443-8106 3930994438106 994438106

6105-14-443-8106 6105144438106 144438106 is a motor which is designed for operation from an alternating current source. see also motor, control.

5411-00-443-8106 5411004438106 004438106 is a rigid, portable shelter designed for protection of personnel/equipment from the environment, and equipped for the capability of transporting by air, land, or sea. it may include leveling devices, lighting, electrical systems, and environmental control connections. for flexible wall shelters, see tent; and air supported structures. excludes building, (as modified).