The Heater,ventilation,duct Type, cataloged under National Stock Number 4520-01-533-5507, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-533-5507 |
| Item Name | Heater,ventilation,duct Type |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Heat Delivery Rate | 3412.0 BRITISH THERMAL UNIT |
| Heat Medium Type | AIR |
| Duct Height | 29.000 INCHES IN |
| Duct Width | 12.250 INCHES IN |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | HORIZONTAL |
| Height | 22.000 INCHES NOMINAL IN |
| Depth | 8.000 INCHES NOMINAL IN |
| Functional Description | THIS SPECIFICATION COVERS ELECTRIC, DUCT TYPE HEATERS USED IN HEATING, VENTILATING, AND AIR CONDITIONING SYSTEMS |
| Width | 9.250 INCHES NOMINAL IN |
| Mounting Type | VENTILATION DUCT |
| Heating Element Type | ELECTRIC NONIMMERSION |
| 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 |
|---|---|
| 501-7526508ITEM18 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| M22594-27M | 2/2 Government specification standardization U.S. Government activity |
| MIL-PRF-22594B | 4/1 Identification reference U.S. Government activity |
NSN 4520-01-533-5507 is a Heater,ventilation,duct Type, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-533-5507: Heat Delivery Rate: 3412.0 BRITISH THERMAL UNIT; Heat Medium Type: AIR; Duct Height: 29.000 INCHES IN; Duct Width: 12.250 INCHES IN. 12 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.