The Unit Heater,air Circulating,stea, cataloged under National Stock Number 4520-01-302-4848, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Airtherm Mfg Co. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-302-4848 |
| Primary Part Number | C40-1L-1F |
| Item Name | Unit Heater,air Circulating,stea |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Airtherm Mfg Co |
| Status | ACTIVE |
| Heat Delivery Rate | 32800.0 BRITISH THERMAL UNIT |
| Phase | SINGLE |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Heat Medium Type | HOT WATER OR STEAM |
| Inclosure Material | STEEL |
| Voltage in Volts | 115.0 |
| Heat Outlet Quantity | 1 |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | VERTICAL |
| Height | 25.000 INCHES NOMINAL IN |
| Air Circulation Device | SQUIRREL CAGE BLOWER |
| Depth | 9.563 INCHES NOMINAL IN |
| Width | 40.500 INCHES NOMINAL IN |
| Heat Directing Device | FIXED LOUVER |
| Mounting Type | FLOOR SURFACE, FREE STANDING, NONDUCTED |
| Heating Element Type | HOT WATER COIL OR STEAM COIL |
| Operating Control Type | HAND SWITCH |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4520-01-302-4848 is a Unit Heater,air Circulating,stea, manufactured by Airtherm Mfg Co, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-302-4848 has 3 manufacturer part numbers on file: C-40-IF (Realtech of Florida Dba Vierk Industrialproducts), C40-1L-1F (Airtherm Mfg Co), C-40-IF (Air-Therm Inc).
Key specifications for C40-1L-1F: Heat Delivery Rate: 32800.0 BRITISH THERMAL UNIT; Phase: SINGLE; Frequency in Hertz: 60.0; Current Type: AC. 18 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.