The Heater,duct Type,portable, cataloged under National Stock Number 4520-00-255-5051, is classified within Federal Supply Class 4520 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Drs Environmental Systems Inc. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-255-5051 |
| Primary Part Number | H250 |
| Item Name | Heater,duct Type,portable |
| FSC / FSG | 4520 / 45 — No Item Name Available |
| Manufacturer | Drs Environmental Systems Inc |
| Status | ACTIVE |
| Prime Mover Type | GASOLINE ENGINE |
| Inclosure Material | STEEL |
| Heating Element Type | COMBUSTION CHAMBER |
| Ignition Method | PILOT |
| Maximum Air Flow Rate | 1650.0 CUBIC FEET PER MINUTE |
| Mounting Type | WHEEL |
| Air Circulation Device | SQUIRREL CAGE BLOWER |
| Outlet Position | IN THE SAME DIRECTION |
| Heat Directing Device | FLEXIBLE DUCTS |
| Operating Control Type | THERMOSTATIC |
| Fuel Feed Method | GRAVITY |
| Depth | 43.000 INCHES NOMINAL IN |
| Heat Delivery Rate | 250000.0 BRITISH THERMAL UNIT |
| Integral Fuel Tank Capacity | 18.0 GALLONS |
| Speed Adjustments | SINGLE SPEED |
| Quantity | 1 |
| Fuel Type | GASOLINE |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | HORIZONTAL |
| Height | 46.000 INCHES NOMINAL IN |
| Heat Outlet Quantity | 2 |
| Circulated Air Type | HEATED |
| Heat Medium Type | AIR |
| Width | 36.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| H250 | Drs Environmental Systems Inc (USA) |
| MIL-H-11049 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| H250 | Keco Industries, Inc. (USA) |
| H250 | Hdt Expeditionary Systems Inc (USA) |
NSN 4520-00-255-5051 is a Heater,duct Type,portable, manufactured by Drs Environmental Systems Inc, classified under FSC 4520 (No Item Name Available). Status: active.
NSN 4520-00-255-5051 has 4 cross-referenced part numbers: H250 (Drs Environmental Systems Inc), MIL-H-11049 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), H250 (Keco Industries, Inc.), H250 (Hdt Expeditionary Systems Inc).
There are 12 known substitutes for 4520-00-255-5051: 4520-00-001-7726, 4520-00-086-7676, 5340-00-187-9035 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for H250: Prime Mover Type: GASOLINE ENGINE; Inclosure Material: STEEL; Heating Element Type: COMBUSTION CHAMBER; Ignition Method: PILOT. 24 total characteristics are documented in the Federal Logistics Information System.