The Heater,duct Type,portable, cataloged under National Stock Number 4520-00-720-0175, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-00-720-0175 |
| Item Name | Heater,duct Type,portable |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Speed Adjustments | SINGLE SPEED |
| Heat Delivery Rate | 400000.0 BRITISH THERMAL UNIT |
| Phase | THREE |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Integral Fuel Tank Capacity | 20.0 GALLONS |
| Heat Medium Type | AIR |
| Reference Data and Literature | AF TO. 35E7-2-3-1 |
| Quantity | 1 |
| Voltage in Volts | 208.0 AND 220.0 |
| Fuel Type | GASOLINE |
| Heat Outlet Quantity | 1 |
| Specification/standard Data | 81349-MIL-H-4607D GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | H-1 TYPE |
| Heat Discharge Outlet Type | ADJUSTABLE |
| Heat Delivery Direction | HORIZONTAL OR VERTICAL |
| Height | 26.000 INCHES NOMINAL IN |
| Air Circulation Device | SQUIRREL CAGE BLOWER |
| Entry Date | 73-01-06 |
| Depth | 41.500 INCHES NOMINAL IN |
| Functional Description | A GASOLINE BURNING SELF-CONTAINED GROUND PORTABLE HEATER W/A WARM AIR HEAT OUTPUT OF 400,000 BTU AT A DISCHARGE TEMP OF 280 DEG F,AT AN AMBIENT TEEMP OF NEG 65 DEG F; SELF SUSTAINED,USING A GASOLINE ENGINE POWERED PACKAGE DEGF |
| Width | 21.000 INCHES NOMINAL IN |
| Flue Connection Location | PER MIL-H-4607 AMEND 2 |
| Prime Mover Type | GASOLINE ENGINE |
| Circulated Air Type | HEATED |
| Heat Directing Device | FLEXIBLE DUCTS |
| Ignition Method | PILOT |
| Mounting Type | WHEEL |
| Fuel Feed Method | INTERNAL PUMP |
| 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 |
|---|---|
| MILH4607TYPEH1CLASS1 | 4/1 Identification reference U.S. Government activity |
NSN 4520-00-720-0175 is a Heater,duct Type,portable, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-00-720-0175: Speed Adjustments: SINGLE SPEED; Heat Delivery Rate: 400000.0 BRITISH THERMAL UNIT; Phase: THREE; Frequency in Hertz: 60.0. 29 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.