Product Details | STATIONARY DUCT TYPE HEATER

4520-01-287-3991 A device capable of producing heat from gas, liquid fuel, or an electrical heating element designed for permanent installation in sheet metal ducts of a forced air circulating system. It consists of (1) a finned, steel burner tube, a combustion air blower, a control panel, and a constant level fuel supply system or (2) a device having a heating element which when connected to an electrical source, directly imparts heat. It may be provided with a flanged outer casing to facilitate mounting in planned or existing duct work. Circulation of the heated air is achieved by use of a blower or fan not integral with the heating unit.

Part Alternates: MILH22594, MIL-H-22594, TFZ33M, TFZ-33M, 4520-01-287-3991, 01-287-3991, 4520012873991, 012873991

Plumbing, Heating, and Waste Disposal Equipment | Space and Water Heating Equipment

Supply Group (FSG) NSN Assign. NIIN
45 21 OCT 1988 01-287-3991

Demand History | NSN 4520-01-287-3991

Part Number Request Date QTY Origin
TFZ-33M 2024-05-136 3 DIBBS
TFZ-33M 2023-04-95 6 DIBBS
TFZ-33M 2023-01-25 2 DIBBS
TFZ-33M 2022-11-320 3 DIBBS
TFZ-33M 2022-10-278 2 DIBBS
TFZ33M 2020-01-27 1 United States
4520-01-287-3991 2018-02-56 5 DIBBS
4520-01-287-3991 2017-10-278 5 DIBBS
4520-01-287-3991 2015-06-152 2 DIBBS
4520-01-287-3991 2015-05-132 1 DIBBS

Cross Reference | NSN 4520-01-287-3991

Part Number Cage Code Manufacturer
MIL-H-22594 81349 MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
TFZ-33M 74924 INDUSTRIAL ENGINEERING AND EQUIPMENT COMPANY, INCORPORATED
TFZ-33M 74974 BLAIR MERRIAM FRESH FRUIT AND PRODUCE CO INC

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Technical Data | NSN 4520-01-287-3991

Characteristic Specifications
HEAT DELIVERY RATE 156316.8 BRITISH THERMAL UNIT
CURRENT TYPE AC
VOLTAGE IN VOLTS 440.0
FREQUENCY IN HERTZ 60.0
PHASE THREE
CURRENT RATING IN AMPS 1054.5
HEATING ELEMENT TYPE ELECTRIC NONIMMERSION
HEAT MEDIUM TYPE AIR
MOUNTING TYPE VENTILATION DUCT
HEIGHT 16.750 INCHES NOMINAL
WIDTH 42.000 INCHES NOMINAL
DEPTH 8.000 INCHES NOMINAL
INCLOSURE MATERIAL STEEL CORROSION RESISTING
OPERATING CONTROL TYPE ANY ACCEPTABLE
SPECIAL FEATURES NON-MAGNETIC
SPECIFICATION/STANDARD DATA 81349-MIL-H-22594 GOVERNMENT SPECIFICATION
NONDEFINITIVE SPEC/STD DATA M TYPE
MANUFACTURERS CODE 81349
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE MIL-H-22594

Restrictions/Controls & Freight Information | NSN 4520-01-287-3991

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
NMF Description 026500 HEATERS WALL INSERT/BASEBOARD TYPE
Less than car load rating
Less than truck load rating Q 70.0
Water commodity Code 576 unknown
Originating Activity Code AX Defense Supply Center Columbus
Columbus, OH 43216-5000
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity B Construction materials: Includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable

Management | NSN 4520-01-287-3991

Category Code Description
Cognizance Codes9BNavy-owned stocks of DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesZINSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each