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NSN 4520-00-498-4173Government record, cited
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Unit Heater, Air Circulating, Stea4520-00-498-4173

NSN 4520-00-498-4173 · NIIN 004984173
FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal
Government record, cited
Also searched as  4520-00-498-4173 · 4520004984173 · NIIN 004984173 · 00-498-4173 · FSC 4520 Space and Water Heating Equipment · MIL-U-17293 · 83D35 SIZE 12 · MILU17293B · M17293CL1SZ12-15VAC1PH60HZ
Nearby stock numbers  ·
Features
  • Unit Heater,air Circulating,stea — FSC 4520
  • 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: HOT WATER OR STEAM
Identification
  • NSN: 4520-00-498-4173
  • NIIN: 004984173
  • FSC: 4520 — Space and Water Heating Equipment
  • FSG: 45 — Plumbing, Heating, and Waste Disposal
General Description

The Unit Heater,air Circulating,stea, cataloged under National Stock Number 4520-00-498-4173, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-00-498-4173
Item NameUnit Heater,air Circulating,stea
FSC / FSG4520 / 45 — Space and Water Heating Equipment
StatusACTIVE
Maximum Air Flow Rate500.0 CUBIC FEET PER MINUTE
Speed AdjustmentsSINGLE SPEED
Heat Delivery Rate30000.0 BRITISH THERMAL UNIT
PhaseSINGLE
Frequency in Hertz60.0
Current TypeAC
Heat Medium TypeHOT WATER OR STEAM
Inclosure MaterialSTEEL
Quantity1
Voltage in Volts115.0
Heat Outlet Quantity1
Specification/standard Data81349-MIL-U-17293D/SH/ GOVERNMENT SPECIFICATION
Nondefinitive Spec/std Data1 TYPE AND 12 SIZE
Heat Discharge Outlet TypeADJUSTABLE
Heat Delivery DirectionHORIZONTAL
Height18.750 INCHES NOMINAL IN
Air Circulation DevicePROPELLER FAN
Surface TreatmentZINC
Maximum Pressure Limit25.0 POUNDS PER SQUARE INCH GAGE LBS
Depth27.000 INCHES NOMINAL IN
Width22.000 INCHES NOMINAL IN
Prime Mover TypeELECTRIC MOTOR
Circulated Air TypeHEATED
Heat Directing DeviceADJUSTABLE LOUVER
Mounting TypeCEILING SUSPENDED
Heating Element TypeHOT WATER COIL AND STEAM COIL
Current Rating in Amps0.81
Operating Control TypeHAND SWITCH
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4520-00-498-417482D35 SIZE 13 POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
Possible match (shared part number)Edge Electronics Corporation Dba Mc Intyre Coil
4520-00-498-417582D35 SIZE 13 230 BOLT POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
Possible match (shared part number)Edge Electronics Corporation Dba Mc Intyre Coil
4520-00-498-417982D35 SIZE 15 NOW-MAGNETIC POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
Possible match (shared part number)Edge Electronics Corporation Dba Mc Intyre Coil
4520-00-498-4183 POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
Possible match (shared part number)
4520-01-274-470782D35 SIZE 14 POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
Possible match (shared part number)Edge Electronics Corporation Dba Mc Intyre Coil
4520-01-274-470882D35 SIZE 12 230 VOLT POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
Possible match (shared part number)Edge Electronics Corporation Dba Mc Intyre Coil
4520-01-340-2190MIL-U-17293 CL2 SZ12(82D35 SZ12) POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
Possible match (shared part number)Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil
4520-01-353-138288D0051 POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
Possible match (shared part number)Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
MIL-U-17293 4/1 Identification reference
U.S. Government activity
83D35 SIZE 12 5/9 Secondary reference
U.S. Government activity
MILU17293B 5/9 Secondary reference
U.S. Government activity
M17293CL1SZ12-15VAC1PH60HZ 2/2 Government specification standardization
U.S. Government activity
Related Parts
4520-00-498-4174POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
82D35 SIZE 13
4520-00-498-4175POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
82D35 SIZE 13 230 BOLT
4520-00-498-4179POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
82D35 SIZE 15 NOW-MAGNETIC
4520-00-498-4183POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
4520-01-274-4707POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
82D35 SIZE 14
4520-01-274-4708POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
82D35 SIZE 12 230 VOLT
4520-01-340-2190POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
MIL-U-17293 CL2 SZ12(82D35 SZ12)
4520-01-353-1382POSSIBLE MATCH
UNIT HEATER,AIR CIRCULATING,STEA
88D0051

Frequently Asked Questions

What is NSN 4520-00-498-4173?

NSN 4520-00-498-4173 is a Unit Heater,air Circulating,stea, classified under FSC 4520, Space and Water Heating Equipment. Status: active.

What NSN replaces 4520-00-498-4173?

8 possible matches (shared part number, not a government interchangeability claim): 4520-00-498-4174, 4520-00-498-4175, 4520-00-498-4179. Verify interchangeability with system specifications before substitution.

What are the specifications of 4520-00-498-4173?

Key specifications for 4520-00-498-4173: Maximum Air Flow Rate: 500.0 CUBIC FEET PER MINUTE; Speed Adjustments: SINGLE SPEED; Heat Delivery Rate: 30000.0 BRITISH THERMAL UNIT; Phase: SINGLE. 28 specifications are documented in the U.S. Government catalog.

Is NSN 4520-00-498-4173 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

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.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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