The Heater,duct Type,portable, cataloged under National Stock Number 4520-01-413-3654, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4520-01-413-3654 |
| Item Name | Heater,duct Type,portable |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Heat Delivery Rate | 400000.0 BRITISH THERMAL UNIT |
| Heat Medium Type | AIR |
| Inclosure Material | STEEL |
| Fuel Type | DF-A ARCTIC DIESEL FUEL OIL OR DF-1 WINTER DIESEL FUEL OIL OR DF-2 REGULAR DIESEL FUEL OIL OR JP-4 JET FUEL OR JP-5 JET FUEL OR JP-6 JET FUEL |
| Heat Outlet Quantity | 1 |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | HORIZONTAL |
| Height | 50.000 INCHES NOMINAL IN |
| Surface Treatment | PAINT |
| Depth | 53.000 INCHES NOMINAL IN |
| Width | 31.000 INCHES NOMINAL IN |
| Heat Directing Device | FLEXIBLE DUCTS |
| Mounting Type | SKID OR TRAILER |
| Type/model Designation | DRAGON II "BIG HEAT" |
| Heating Element Type | COMBUSTION CHAMBER |
| 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 |
|---|---|
| 50850 | 5/9 Secondary reference U.S. Government activity |
| 4-50850 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4520-01-413-3654 is a Heater,duct Type,portable, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-413-3654: Heat Delivery Rate: 400000.0 BRITISH THERMAL UNIT; Heat Medium Type: AIR; Inclosure Material: STEEL; Fuel Type: DF-A ARCTIC DIESEL FUEL OIL OR DF-1 WINTER DIESEL FUEL OIL OR DF-2 REGULAR DIESEL FUEL OIL OR JP-4 JET FUEL OR JP-5 JET FUEL OR JP-6 JET FUEL. 15 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.