The Air Inlet Group, cataloged under National Stock Number 4520-01-083-3458, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4520-01-083-3458 |
| Item Name | Air Inlet Group |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| FSC Application Data | HEATER,TRAILER MOUNTED,HDU-13M |
| General Characteristics Item Description | ASSY OF 1 HEATER COIL,1 INLET DUCT,2 COIL ASSY COVERS,1 AIR INLET FILTER,1 OUTLET DUCT,1 DAMPER,INSULATION FOR DUCT TOP,BOTTOM,END,AND SIDES,1 CABLE STORAGE SUPPORT,INSULATION FOR TOP AND BOTTOM OF COIL |
| 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 |
|---|---|
| 74008-1 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 74008-1 | 5/2 Secondary reference U.S. Government activity |
| 74008-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4520-01-083-3458 is a Air Inlet Group, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-083-3458: FSC Application Data: HEATER,TRAILER MOUNTED,HDU-13M; General Characteristics Item Description: ASSY OF 1 HEATER COIL,1 INLET DUCT,2 COIL ASSY COVERS,1 AIR INLET FILTER,1 OUTLET DUCT,1 DAMPER,INSULATION FOR DUCT TOP,BOTTOM,END,AND SIDES,1 CABLE STORAGE SUPPORT,INSULATION FOR TOP AND BOTTOM OF COIL. 2 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.