The Unit Heater,air Circulating,stea, cataloged under National Stock Number 4520-01-340-2190, 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 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-340-2190 |
| Primary Part Number | MIL-U-17293 CL2 SZ12(82D35 SZ12) |
| Item Name | Unit Heater,air Circulating,stea |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| Status | ACTIVE |
| Maximum Air Flow Rate | 500.0 CUBIC FEET PER MINUTE |
| Speed Adjustments | SINGLE SPEED |
| Heat Delivery Rate | 30000.0 BRITISH THERMAL UNIT |
| Phase | SINGLE |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Heat Medium Type | STEAM |
| Inclosure Material | ALUMINUM OR STEEL CORROSION RESISTING |
| Quantity | 1 |
| Voltage in Volts | 115.0 |
| Specification/standard Data | 81349-MIL-U-17293D(SH) GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | 2 CLASS AND 12 SIZE |
| Height | 18.375 INCHES NOMINAL IN |
| Air Circulation Device | PROPELLER FAN |
| Depth | 14.625 INCHES NOMINAL IN |
| Width | 27.000 INCHES NOMINAL IN |
| Prime Mover Type | ELECTRIC MOTOR |
| Circulated Air Type | HEATED |
| Mounting Type | FLOOR-WALL |
| Heating Element Type | STEAM COIL |
| Current Rating in Amps | 1.6 |
| 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 |
|---|---|
| MIL-U-17293 CL2 SZ12(82D35 SZ12) PRIMARY | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| Reference | Meaning |
|---|---|
| MIL-U-17293 | 4/1 Identification reference U.S. Government activity |
| MILU17293D-SZ12 CL2115VAC60HZ1P | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 82D35 SZ12(115VAC) | 5/9 Secondary reference U.S. Government activity |
NSN 4520-01-340-2190 is a Unit Heater,air Circulating,stea, 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 4520-01-340-2190 has 1 manufacturer part number on file: MIL-U-17293 CL2 SZ12(82D35 SZ12) (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
1 possible match (shared part number, not a government interchangeability claim): 4520-01-353-1382. Verify interchangeability with system specifications before substitution.
Key specifications for MIL-U-17293 CL2 SZ12(82D35 SZ12): Maximum Air Flow Rate: 500.0 CUBIC FEET PER MINUTE; Speed Adjustments: SINGLE SPEED; Heat Delivery Rate: 30000.0 BRITISH THERMAL UNIT; Phase: SINGLE. 21 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.