The Furnace,warm Air, cataloged under National Stock Number 4520-00-453-9141, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-453-9141 |
| Item Name | Furnace,warm Air |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Speed Adjustments | SINGLE SPEED |
| Heat Delivery Rate | 450000.0 BRITISH THERMAL UNIT |
| Phase | THREE |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Heat Medium Type | AIR |
| Inclosure Material | STEEL |
| Quantity | 1 |
| Voltage in Volts | 230.0 |
| Fuel Type | FS NO. 2 BURNER FUEL OIL |
| Heat Outlet Quantity | 1 |
| Nondefinitive Spec/std Data | 1 TYPE AND A STYLE AND 500 SIZE AND 3 GROUP AND LO,BURNER CLASS |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | VERTICAL |
| Air Circulation Device | PROPELLER FAN |
| Surface Treatment | ENAMEL |
| Air Filter Type | REPLACEABLE PREFORMED |
| Prime Mover Type | ELECTRIC MOTOR |
| Circulated Air Type | HEATED |
| Heat Directing Device | ADJUSTABLE LOUVER |
| Ignition Method | PILOT |
| Mounting Type | FLOOR SURFACE, FREE STANDING, DUCTED |
| Fuel Feed Method | GRAVITY |
| Heating Element Type | BURNER |
| Current Rating in Amps | 5.4 |
| Operating Control Type | THERMOSTATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MILF17104 | 5/9 Secondary reference U.S. Government activity |
| WW-F-2743 | 4/1 Identification reference U.S. Government activity |
NSN 4520-00-453-9141 is a Furnace,warm Air, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4520-00-453-9142, 4520-00-453-9143, 4520-00-453-9144. Verify interchangeability with system specifications before substitution.
Key specifications for 4520-00-453-9141: Speed Adjustments: SINGLE SPEED; Heat Delivery Rate: 450000.0 BRITISH THERMAL UNIT; Phase: THREE; Frequency in Hertz: 60.0. 26 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.