The Heater,ventilation,duct Type, cataloged under National Stock Number 4520-01-281-0903, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-281-0903 |
| Primary Part Number | 1D23-19.5-5604F-4.7-H-B |
| Item Name | Heater,ventilation,duct Type |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| Status | ACTIVE |
| Heat Medium Type | STEAM |
| Inclosure Material | STEEL CORROSION RESISTING AND COPPER ALLOY |
| Heat Outlet Quantity | 1 |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | HORIZONTAL |
| Height | 37.500 INCHES NOMINAL IN |
| Maximum Pressure Limit | 350.0 POUNDS PER SQUARE INCH GAGE LBS |
| Depth | 3.500 INCHES NOMINAL IN |
| Width | 22.500 INCHES NOMINAL IN |
| Mounting Type | VENTILATION DUCT |
| Heating Element Type | STEAM COIL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ID23-19.5-5604F | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| 1D23-19.5-5604F-4.7-H-B PRIMARY | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| Reference | Meaning |
|---|---|
| 1D23-19.5-5604F | 5/9 Secondary reference Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
NSN 4520-01-281-0903 is a Heater,ventilation,duct Type, manufactured by Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-281-0903 has 2 manufacturer part numbers on file: ID23-19.5-5604F (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil), 1D23-19.5-5604F-4.7-H-B (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
Key specifications for 1D23-19.5-5604F-4.7-H-B: Heat Medium Type: STEAM; Inclosure Material: STEEL CORROSION RESISTING AND COPPER ALLOY; Heat Outlet Quantity: 1; Heat Discharge Outlet Type: STATIONARY. 11 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.