The Heater,duct Type,portable, cataloged under National Stock Number 4520-01-135-2770, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-135-2770 |
| Item Name | Heater,duct Type,portable |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Maximum Air Flow Rate | 1500.0 CUBIC FEET PER MINUTE |
| Speed Adjustments | SINGLE SPEED |
| Heat Delivery Rate | 400000.0 BRITISH THERMAL UNIT |
| Integral Fuel Tank Capacity | 35.0 GALLONS |
| Heat Medium Type | AIR |
| Reference Data and Literature | TO. 35E7-2-11-11 |
| Quantity | 1 |
| Fuel Type | JP-4 JET FUEL AND JP-5 JET FUEL AND DF-A ARCTIC DIESEL FUEL OIL AND DF-1 WINTER DIESEL FUEL OIL AND DF-2 REGULAR DIESEL FUEL OIL |
| Heat Outlet Quantity | 1 |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | HORIZONTAL |
| Height | 44.000 INCHES NOMINAL IN |
| Air Circulation Device | PROPELLER FAN |
| Depth | 68.500 INCHES NOMINAL IN |
| Functional Description | BURNS DLS OR JET FUEL TO PREHEAT ACFT ENGINES & FUSELAGE OR HEAT GND VEHICLES,MAINT. BLDG,FLD SHELTER & TEMPORARY STRUCT; PROVIDES FORCED FRESH VENTILATION W/O HEATING |
| Width | 51.500 INCHES NOMINAL IN |
| Prime Mover Type | DIESEL ENGINE |
| Circulated Air Type | COOLING OR HEATED |
| Heat Directing Device | FLEXIBLE DUCTS |
| Ignition Method | ELECTRODE |
| Mounting Type | TRAILER |
| Fuel Feed Method | INTERNAL PUMP |
| Heating Element Type | COMBUSTION CHAMBER |
| 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 |
| Reference | Meaning |
|---|---|
| PH400-D | 3/2 Design control — primary reference U.S. Government activity |
NSN 4520-01-135-2770 is a Heater,duct Type,portable, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-135-2770: Maximum Air Flow Rate: 1500.0 CUBIC FEET PER MINUTE; Speed Adjustments: SINGLE SPEED; Heat Delivery Rate: 400000.0 BRITISH THERMAL UNIT; Integral Fuel Tank Capacity: 35.0 GALLONS. 24 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.