The Heater,space, cataloged under National Stock Number 4520-00-280-1830, 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26 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4520-00-280-1830 |
| Item Name | Heater,space |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Maximum Air Flow Rate | 500.0 CUBIC FEET PER MINUTE |
| Speed Adjustments | SINGLE SPEED |
| Heat Delivery Rate | 60000.0 BRITISH THERMAL UNIT |
| Phase | SINGLE |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Inclosure Material | STEEL |
| Quantity | 1 |
| Voltage in Volts | 120.0 |
| Fuel Type | JP-4 JET FUEL OR DF-A ARCTIC DIESEL FUEL OIL OR DF-1 WINTER DIESEL FUEL OIL OR DF-2 REGULAR DIESEL FUEL OIL |
| Specification/standard Data | 81349-MIL-H-11511 GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | 1 TYPE |
| Height | 21.250 INCHES NOMINAL IN |
| Air Circulation Device | SQUIRREL CAGE BLOWER |
| Surface Treatment | ENAMEL |
| Depth | 11.125 INCHES NOMINAL IN |
| Width | 28.375 INCHES NOMINAL IN |
| Flue Connection Location | CENTERED 4.188 IN. FROM BASE,4.938 IN. FROM LEFT EDGE FROM REAR VIEW IN |
| Prime Mover Type | ELECTRIC MOTOR |
| Circulated Air Type | HEATED |
| Ignition Method | ELECTRODE |
| Mounting Type | CEILING SUSPENDED |
| Fuel Feed Method | EXTERNAL PUMP |
| Heating Element Type | COMBUSTION CHAMBER |
| Current Rating in Amps | 7.0 |
| Operating Control Type | HAND SWITCH AND THERMOSTATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| MIL-H-11511 | 4/1 Identification reference U.S. Government activity |
| UH68E | 3/2 Design control — primary reference U.S. Government activity |
NSN 4520-00-280-1830 is a Heater,space, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4520-00-683-8595, 4520-00-778-7136, 4520-00-999-8523. Verify interchangeability with system specifications before substitution.
Key specifications for 4520-00-280-1830: Maximum Air Flow Rate: 500.0 CUBIC FEET PER MINUTE; Speed Adjustments: SINGLE SPEED; Heat Delivery Rate: 60000.0 BRITISH THERMAL UNIT; Phase: SINGLE. 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.