The Heater,duct Type,stationary, cataloged under National Stock Number 4520-01-250-5066, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-250-5066 |
| Item Name | Heater,duct Type,stationary |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Heat Delivery Rate | 97242.0 BRITISH THERMAL UNIT |
| Phase | THREE |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Heat Medium Type | AIR |
| Inclosure Material | STEEL CORROSION RESISTING |
| Duct Height | 15.250 INCHES IN |
| Voltage in Volts | 440.0 |
| Duct Width | 56.000 INCHES IN |
| Specification/standard Data | 81349-MIL-H-22594 GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | L TYPE AND 34EH SIZE |
| Height | 18.250 INCHES NOMINAL IN |
| Depth | 8.000 INCHES NOMINAL IN |
| Width | 66.000 INCHES NOMINAL IN |
| Mounting Type | VENTILATION DUCT |
| Heating Element Type | ELECTRIC NONIMMERSION |
| Current Rating in Amps | 64.7 |
| Operating Control Type | THERMOSTATIC |
| 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 |
|---|---|
| TFZ-34L | 5/1 Secondary reference Indeeco Llc Dba Indeeco |
| MIL-H-22594 | 5/9 Secondary reference U.S. Government activity |
| M22594-34L | 2/2 Government specification standardization U.S. Government activity |
| MIL-PRF-22594 | 4/1 Identification reference U.S. Government activity |
| EH34L | 5/1 Secondary reference Valad Electric Heating Corp. |
NSN 4520-01-250-5066 is a Heater,duct Type,stationary, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-250-5066: Heat Delivery Rate: 97242.0 BRITISH THERMAL UNIT; Phase: THREE; Frequency in Hertz: 60.0; Current Type: AC. 18 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.