The Heater,duct Type,stationary, cataloged under National Stock Number 4520-01-357-4142, 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 Chromalox Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-357-4142 |
| Primary Part Number | 106-302111-020 |
| Item Name | Heater,duct Type,stationary |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc |
| Status | ACTIVE |
| Heat Delivery Rate | 31049.2 BRITISH THERMAL UNIT |
| Phase | THREE |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Heat Medium Type | AIR |
| Inclosure Material | STEEL CORROSION RESISTING |
| Duct Height | 6.250 INCHES IN |
| Voltage in Volts | 440.0 |
| Duct Width | 22.000 INCHES IN |
| Specification/standard Data | 81349-MIL-H-22594A GOVERNMENT SPECIFICATION A |
| Nondefinitive Spec/std Data | EH26 SIZE AND M TYPE |
| Height | 9.250 INCHES NOMINAL IN |
| Depth | 8.000 INCHES NOMINAL IN |
| Width | 29.250 INCHES NOMINAL IN |
| Mounting Type | VENTILATION DUCT |
| Heating Element Type | ELECTRIC NONIMMERSION |
| Current Rating in Amps | 11.9 |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 302111-020 | Chromalox Inc (USA) |
| 106-302111-020 PRIMARY | Chromalox Inc (USA) |
| Reference | Meaning |
|---|---|
| 106-302111-000 | D/9 Drawing number reference only Chromalox Inc |
| MIL-H-22594 | 4/1 Identification reference U.S. Government activity |
NSN 4520-01-357-4142 is a Heater,duct Type,stationary, manufactured by Chromalox Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-357-4142 has 2 manufacturer part numbers on file: 302111-020 (Chromalox Inc), 106-302111-020 (Chromalox Inc).
Key specifications for 106-302111-020: Heat Delivery Rate: 31049.2 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.