The Heater,duct Type,portable, cataloged under National Stock Number 4520-00-720-0176, 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24 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-720-0176 |
| Item Name | Heater,duct Type,portable |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Maximum Air Flow Rate | 926.1 CUBIC FEET PER MINUTE |
| Speed Adjustments | SINGLE SPEED |
| Heat Delivery Rate | 230000.0 BRITISH THERMAL UNIT |
| Integral Fuel Tank Capacity | 28.0 GALLONS |
| Heat Medium Type | AIR |
| Reference Data and Literature | AF TO. 35E7-2-5-1 |
| Quantity | 1 |
| Fuel Type | 80/87 OCTANE GASOLINE AND 91/96 OCTANE GASOLINE AND 100/130 OCTANE GASOLINE AND 115/145 OCTANE GASOLINE |
| Specification/standard Data | 81349-MIL-H-26934B GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | MC1 TYPE |
| Height | 48.000 INCHES NOMINAL IN |
| Air Circulation Device | SQUIRREL CAGE BLOWER |
| Depth | 69.000 INCHES NOMINAL IN |
| Functional Description | THE TYPES MC-1 AND MD-1 HEATERS ARE INTENDED FOR USE IN THE HEATING OF AIRCRAFT COMPARTMENTS BY DELIVERY OF HEATED AIR AT MODERATE PRESSURES THROUGH AN AIRBORNE DUCT SYSTEM |
| Width | 42.000 INCHES NOMINAL IN |
| Fuel Consumption Rate Per Hour | 4.7 GALLONS |
| Flue Connection Location | TOP MTD W/18IN. EXTENSION IN |
| Prime Mover Type | GASOLINE ENGINE |
| Circulated Air Type | HEATED |
| Ignition Method | ELECTRODE |
| Mounting Type | TRAILER |
| Fuel Feed Method | INTERNAL PUMP |
| Heating Element Type | COMBUSTION CHAMBER |
| 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 |
|---|---|
| MC1 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| MC1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4520-00-720-0176 is a Heater,duct Type,portable, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-00-720-0176: Maximum Air Flow Rate: 926.1 CUBIC FEET PER MINUTE; Speed Adjustments: SINGLE SPEED; Heat Delivery Rate: 230000.0 BRITISH THERMAL UNIT; Integral Fuel Tank Capacity: 28.0 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.