Type a 13-digit NSN, a 9-digit NIIN, a manufacturer part number, or a category name such as “gasket”.

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Open demand Services Catalog Price history Agencies

Open demand × Plumbing, Heating, and Waste Disposal Equipment

Space and Water Heating Equipment FSC 4520

Open solicitations in Federal Supply Class 4520 — real requests for quote a supplier can bid on today, linked to the official DIBBS record for each one — plus the ones we've already recorded as they closed. Nothing here gets deleted when it expires: this category's demand history grows every time an RFQ closes.

58
Open solicitations
46
Closing within 7 days
1,934
Total open quantity
330
Tracked all-time (272 closed)

Closing dates and quantities

Closing calendar

What closes when? Solicitations by closing date for the next 30 days.

  • Closes within 7 days
  • Closes later
1020304050Nov 6Nov 13Nov 20Nov 27Dec 4closing date

Counts as of Nov 6, 2026. Weekends are near zero because DLA sets weekday deadlines.

Bid-window map

Which open solicitations are large, and how long is left? One mark per solicitation.

  • Coded for competition
  • Coded for a named source
  • Not coded
1101001,000today7d14dthis weekdays until the solicitation closesquantity requested (log scale)

Open parts

4520-00-796-4444

DAMPER,FLUE

Open · closes today 6 units Named source

5 solicitations (1 open · 4 closed)

4520-01-539-7164

CONTROL BOX,OPERATO

Open · closes in 3d 37 units Named source

3 solicitations (2 open · 1 closed)

4520-01-468-7112

HEATER,SPACE

Open · closes in 3d 69 units Competed

1 solicitation (1 open · 0 closed)

4520-15-027-6028

COLLAR, AIR CONDITIONIN

Open · closes in 3d 113 units

1 solicitation (1 open · 0 closed)

4520-01-065-2191

HEATER,WATER,GAS

Open · closes in 3d 1 units Named source

1 solicitation (1 open · 0 closed)

4520-01-725-5878

HEATER,WATER,ELECTRIC

Open · closes in 3d 3 units Competed

2 solicitations (1 open · 1 closed)

4520-00-113-1963

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 6 units Named source

1 solicitation (1 open · 0 closed)

4520-00-498-4174

UNIT HEATER,AIR CIRCULATING,STEA

Open · closes in 3d 6 units Competed

1 solicitation (1 open · 0 closed)

4520-00-552-3716

HEATER,WATER,ELECTRIC

Open · closes in 3d 18 units Competed

2 solicitations (1 open · 1 closed)

4520-01-262-7712

HEATER,WATER,ELECTRIC

Open · closes in 3d 14 units Named source

2 solicitations (1 open · 1 closed)

4520-01-303-1172

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 8 units Competed

1 solicitation (1 open · 0 closed)

4520-01-303-1173

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 5 units Named source

1 solicitation (1 open · 0 closed)

4520-01-327-9705

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 30 units Competed

1 solicitation (1 open · 0 closed)

4520-01-302-4390

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 33 units Named source

1 solicitation (1 open · 0 closed)

4520-01-437-1408

PIPE,AIR CONDITIONING-HEATING

Open · closes in 3d 7 units Named source

1 solicitation (1 open · 0 closed)

4520-01-391-8325

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 83 units Named source

2 solicitations (1 open · 1 closed)

4520-01-469-5743

SHA COVER BURNER

Open · closes in 3d 184 units Named source

1 solicitation (1 open · 0 closed)

4520-01-423-6508

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 1 units Named source

1 solicitation (1 open · 0 closed)

4520-01-412-9556

PIPE,AIR CONDITIONING-HEATING

Open · closes in 3d 29 units Competed

2 solicitations (1 open · 1 closed)

4520-01-453-2361

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 16 units Named source

1 solicitation (1 open · 0 closed)

4520-01-328-6083

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 20 units Competed

1 solicitation (1 open · 0 closed)

4520-01-469-5779

SHA PLATE IDENTIFER

Open · closes in 3d 265 units Named source

1 solicitation (1 open · 0 closed)

4520-01-481-6789

PIPE,AIR CONDITIONING-HEATING

Open · closes in 3d 12 units Competed

2 solicitations (1 open · 1 closed)

4520-01-532-3184

PIPE,AIR CONDITIONING-HEATING

Open · closes in 3d 33 units Named source

1 solicitation (1 open · 0 closed)

4520-01-485-4457

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 1 units Named source

1 solicitation (1 open · 0 closed)

4520-01-550-6461

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 73 units Named source

1 solicitation (1 open · 0 closed)

4520-01-527-4928

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 7 units Named source

1 solicitation (1 open · 0 closed)

4520-01-530-8693

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 37 units Named source

1 solicitation (1 open · 0 closed)

4520-01-530-8694

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 3 units Named source

1 solicitation (1 open · 0 closed)

4520-01-559-0984

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 51 units Named source

1 solicitation (1 open · 0 closed)

4520-01-597-3589

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 24 units Named source

3 solicitations (1 open · 2 closed)

4520-01-579-9647

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 59 units Named source

2 solicitations (1 open · 1 closed)

4520-01-646-6724

HEATER,FLUID,ELECTRIC

Open · closes in 3d 7 units Named source

1 solicitation (1 open · 0 closed)

4520-01-632-6562

HEATING BLANKET,ELECTRICAL

Open · closes in 3d 45 units Named source

1 solicitation (1 open · 0 closed)

4520-01-660-8564

ADAPTER,AIR CONDITIONING-HEATING

Open · closes in 3d 32 units Competed

1 solicitation (1 open · 0 closed)

4520-01-230-8901

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 3 units Named source

1 solicitation (1 open · 0 closed)

4520-01-655-9608

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 1 units Named source

1 solicitation (1 open · 0 closed)

4520-01-709-2060

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 3d 1 units Competed

2 solicitations (1 open · 1 closed)

4520-01-647-9024

HEATER,DUCT TYPE,STATIONARY

Open · closes in 3d 1 units Named source

1 solicitation (1 open · 0 closed)

4520-01-474-6567

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 1 units Named source

1 solicitation (1 open · 0 closed)

4520-01-207-1159

HEATER,WATER,ELECTRIC

Open · closes in 3d 1 units Named source

1 solicitation (1 open · 0 closed)

4520-01-314-2099

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 468 units Named source

1 solicitation (1 open · 0 closed)

4520-01-538-0979

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 3d 13 units Named source

1 solicitation (1 open · 0 closed)

4520-15-035-1321

HEATER, WATER, LIQUID FU

Open · closes in 5d 7 units

3 solicitations (1 open · 2 closed)

4520-01-398-9767

TERMINAL, VENTILATION D

Open · closes in 7d 14 units

1 solicitation (1 open · 0 closed)

4520-01-493-5979

HEATER,WATER,ELECTRIC

Open · closes in 10d 4 units Named source

2 solicitations (1 open · 1 closed)

4520-01-348-8937

HEATER,SPACE,ELECTRIC

Open · closes in 10d 4 units Named source

1 solicitation (1 open · 0 closed)

4520-01-539-8861

HEATING ELEMENT,ELECTRICAL,IMMER

Open · closes in 10d 33 units Named source

2 solicitations (1 open · 1 closed)

4520-01-601-2709

PIPE,EXHAUST

Open · closes in 10d 35 units Competed

1 solicitation (1 open · 0 closed)

4520-01-556-2107

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 10d 2 units Named source

2 solicitations (1 open · 1 closed)

4520-01-556-2651

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 10d 2 units Named source

3 solicitations (1 open · 2 closed)

4520-01-556-2121

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 10d 2 units Named source

2 solicitations (1 open · 1 closed)

4520-01-556-2643

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 10d 2 units Named source

2 solicitations (1 open · 1 closed)

4520-01-556-2662

HEATING ELEMENT,ELECTRICAL,NONIM

Open · closes in 10d 2 units Named source

2 solicitations (1 open · 1 closed)

4520-01-546-1012

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Nov 5, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-277-8339

PIPE,AIR CONDITIONING-HEATING

Closed · last Nov 3, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-182-0742

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Nov 2, 2026 — units Competed

2 solicitations (0 open · 2 closed)

4520-01-690-9323

DAMPER,FLUE

Closed · last Nov 2, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-545-7075

RADIATOR

Closed · last Nov 2, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-568-7225

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Nov 2, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-605-3958

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Nov 2, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-625-4408

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Nov 2, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-179-9792

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Nov 2, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-540-7938

HEATER,WATER,ELECTRIC

Closed · last Oct 30, 2026 — units Named source

3 solicitations (0 open · 3 closed)

4520-01-213-7986

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 30, 2026 — units Competed

3 solicitations (0 open · 3 closed)

4520-01-257-7866

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 30, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-686-8025

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Oct 28, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-657-4780

HEATER,DUCT TYPE,STATIONARY

Closed · last Oct 27, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-657-7310

HEATER,DUCT TYPE,STATIONARY

Closed · last Oct 27, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-887-2753

DUCT ASSEMBLY

Closed · last Oct 27, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-15-122-5887

HEATING ELEMENT, ELECTR

Closed · last Oct 27, 2026 — units

1 solicitation (0 open · 1 closed)

4520-01-675-7723

HEATER,SPACE,ELECTRIC

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-312-4138

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Oct 26, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-512-9450

FEED HEATER ASSY

Closed · last Oct 26, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-00-396-1696

TERMINAL,VENTILATION DUCT

Closed · last Oct 26, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-469-5578

SHA WIRE RACK ASSY

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-493-2815

SHC LABEL KIT

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-370-5933

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-466-0409

FUEL CONTROL VALVE

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-515-8360

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 26, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-542-0727

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-611-3958

HEATER,VENTILATION,DUCT TYPE

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-516-2852

HEATER ASSY

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-169-4891

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Oct 26, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-197-2095

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Oct 26, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-216-9316

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 26, 2026 — units Competed

3 solicitations (0 open · 3 closed)

4520-01-198-0737

HEATER,DUCT TYPE,STATIONARY

Closed · last Oct 26, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-197-8399

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-254-4855

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 26, 2026 — units Named source

4 solicitations (0 open · 4 closed)

4520-01-333-1937

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 26, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-708-7882

HEATER,SPACE,ELECTRIC

Closed · last Oct 26, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-419-2568

HEATER,SPACE,ELECTRIC

Closed · last Oct 26, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-213-1247

PIPE,AIR CONDITIONING-HEATING

Closed · last Oct 26, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-603-2169

PIPE,AIR CONDITIONING-HEATING

Closed · last Oct 22, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-371-8081

HEATER,DUCT TYPE,STATIONARY

Closed · last Oct 22, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-631-2212

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 22, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-590-5246

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 20, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-483-4737

ELBOW,AIR CONDITIONING-HEATING

Closed · last Oct 19, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-169-8647

HEATER,DUCT TYPE,STATIONARY

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-632-7265

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-493-2800

SHC TENT CONTROLLER

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-493-2807

SHC IN TENT CONTROL

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-310-8279

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-539-7188

PIPE,EXHAUST

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-250-4078

HEATER,SPACE,ELECTRIC

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-330-5906

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-278-9931

REDUCER,AIR CONDITIONING-HEATING

Closed · last Oct 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-624-3577

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-228-9515

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-289-1508

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-324-7714

PUMPING UNIT,CONDENSATE,HEATING-

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-286-8565

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-374-5421

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-353-0325

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-229-8985

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-339-5949

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-377-9006

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-439-3013

ADAPTER,AIR CONDITIONING-HEATING

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-420-5253

HEATER,DUCT TYPE,STATIONARY

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-597-1001

HEATER,VENTILATION,DUCT TYPE

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-606-9957

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-616-2303

HUMIDIFIER,ASSEMBLY

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-628-3222

HEATER,DUCT TYPE,STATIONARY

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-674-3772

DAMPER,FLUE

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-121-0816

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-305-0090

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Oct 13, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-310-0693

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-302-5300

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Oct 13, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-317-8979

HEATER,WATER,ELECTRIC

Closed · last Oct 13, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-236-2854

HEATER,WATER,ELECTRIC

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-493-2797

SHC WRENCH

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-524-4261

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-332-6786

HEATER,SPACE,ELECTRIC

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-493-2810

SHC ADAPTER BATTERY

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-595-9096

HEATER,SPACE,ELECTRIC

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-478-9207

HEATER,SPACE

Closed · last Oct 13, 2026 — units Competed

2 solicitations (0 open · 2 closed)

4520-01-536-1470

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-618-8238

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-300-7805

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Oct 13, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-138-8488

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-680-9722

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Oct 9, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-568-7467

HEATER,DUCT TYPE,STATIONARY

Closed · last Sep 30, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-976-2253

SLEEVE,RETAINER

Closed · last Sep 28, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-185-7021

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 28, 2026 — units Competed

2 solicitations (0 open · 2 closed)

4520-00-240-8314

HEATER,SPACE,ELECTRIC

Closed · last Sep 28, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-303-4195

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Sep 28, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-456-9454

HEATER,WATER,ELECTRIC

Closed · last Sep 28, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-328-5729

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 28, 2026 — units Competed

2 solicitations (0 open · 2 closed)

4520-01-493-2794

SHC RETAINER BATTER

Closed · last Sep 28, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-20-004-2192

HEATING ELEMENT, ELE

Closed · last Sep 28, 2026 — units

3 solicitations (0 open · 3 closed)

4520-01-685-4500

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Sep 28, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-144-0337

CONNECTOR

Closed · last Sep 28, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-506-9008

TERMINAL,VENTILATION DUCT

Closed · last Sep 25, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-503-6698

JACKET ASSY,H20 HEA

Closed · last Sep 25, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-00-497-1885

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 22, 2026 — units Named source

4 solicitations (0 open · 4 closed)

4520-01-554-3418

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Sep 21, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-560-4427

HEATER,WATER,ELECTRIC

Closed · last Sep 21, 2026 — units Named source

3 solicitations (0 open · 3 closed)

4520-01-445-7799

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 21, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-706-8008

HEATING BLANKET,ELECTRICAL

Closed · last Sep 21, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-706-8039

HEATING BLANKET,ELECTRICAL

Closed · last Sep 21, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-00-273-1276

HEATER,VENTILATION,DUCT TYPE

Closed · last Sep 21, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-588-9260

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 18, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-589-0013

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 18, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-232-9768

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-302-5301

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Sep 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-133-1581

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 17, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-706-7559

HEATER,SPACE

Closed · last Sep 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-197-6836

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-142-2640

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 15, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-628-5204

HEATER,VENTILATION,DUCT TYPE

Closed · last Sep 15, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-698-3785

DAMPER,FLUE

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-135-0114

HEATER,DUCT TYPE,STATIONARY

Closed · last Sep 14, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-00-545-3512

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-219-6486

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-257-9763

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-317-8875

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-236-4363

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-505-3098

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-247-1437

HEATER,DUCT TYPE,STATIONARY

Closed · last Sep 14, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-539-7184

ASSEMBLY,JACK

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-628-3360

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-584-5207

HEATER,SPACE,ELECTRIC

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-646-3534

HEATER,WATER,STEAM AND ELECTRIC

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-177-6198

HEATER,SPACE,ELECTRIC

Closed · last Sep 14, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-148-9352

HEATER,DUCT TYPE,STATIONARY

Closed · last Sep 14, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-00-081-7912

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 14, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-169-7691

ROD,NONMETALLIC

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-340-5071

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 11, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-304-4255

HEATER,WATER,ELECTRIC

Closed · last Sep 11, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-696-0787

HEATER,FLUID,ELECTRIC

Closed · last Sep 8, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-110-1144

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Sep 3, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-646-6327

HEATER,SPACE,ELECTRIC

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-504-8584

COVER,HOUSING

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-457-8884

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-590-0807

HEATING BLANKET,ELECTRICAL

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-224-7299

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-278-0916

IGNITER,SPARK,FUEL

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-468-7419

HEATER,SPACE,ELECTRIC

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-469-5561

SHA LID ASSY

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-493-1836

PIPE,EXHAUST

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-592-2632

HEATING BLANKET,ELECTRICAL

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-645-3262

HEATER,SPACE,ELECTRIC

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-273-1265

HEATER,VENTILATION,DUCT TYPE

Closed · last Aug 30, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-595-4288

COLLAR,AIR CONDITIONING-HEATING

Closed · last Aug 28, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-181-8723

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 28, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-802-8302

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 28, 2026 — units Competed

2 solicitations (0 open · 2 closed)

4520-01-151-3295

HEATER,DUCT TYPE,STATIONARY

Closed · last Aug 28, 2026 — units Competed

2 solicitations (0 open · 2 closed)

4520-01-470-0784

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 28, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-445-6856

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-452-6092

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-20-015-2289

PIPE, AIR CONDITIONI

Closed · last Aug 24, 2026 — units

1 solicitation (0 open · 1 closed)

4520-01-232-5614

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-587-2106

HEATPAD

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-474-2136

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-158-8300

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-572-5558

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-503-6626

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-605-6764

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 24, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-513-1562

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 21, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-306-7634

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Aug 20, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-487-1662

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 20, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-269-7834

HEATER,SPACE,ELECTRIC

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-596-6656

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-137-2469

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-151-4308

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-299-3607

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 17, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-486-2925

HEATER,WATER,ELECTRIC

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-508-5743

SHC HOSE ASSY

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-555-7578

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-590-0756

HEATING BLANKET,ELECTRICAL

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-590-0897

HEATING BLANKET,ELECTRICAL

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-557-4617

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-592-2651

HEATING BLANKET,ELECTRICAL

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-690-4732

BURNER ASSEMBLY,SPACE HEATER

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-12-317-7848

HEATER, WATER, ELECTRIC

Closed · last Aug 17, 2026 — units

1 solicitation (0 open · 1 closed)

4520-01-708-1124

HEATING BLANKET,ELECTRICAL

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-590-7140

HEATER,WATER,ELECTRIC

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-592-2658

HEATING BLANKET,ELECTRICAL

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-699-9873

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-493-2781

SHC SENSOR FLAME

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-273-1258

HEATER,VENTILATION,DUCT TYPE

Closed · last Aug 17, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-455-7570

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-062-7355

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-069-8621

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 17, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-326-6724

HEATER,DUCT TYPE,STATIONARY

Closed · last Aug 17, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4520-01-467-0773

HEATER,IMMERSION,LIQUID FUEL FIR

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-197-7112

HEATING ELEMENT,ELECTRICAL,NONIM

Closed · last Aug 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-602-5269

HEATING ELEMENT

Closed · last Aug 12, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-01-582-5652

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 7, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4520-01-597-5224

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 6, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4520-00-740-3428

HEATING ELEMENT,ELECTRICAL,IMMER

Closed · last Aug 6, 2026 — units Competed

1 solicitation (0 open · 1 closed)

Cite this page
Citation

NSN Explorer. "Space and Water Heating Equipment FSC 4520." nsnexplorer.com, https://nsnexplorer.com/open/4520/. Data as of November 6, 2026.

Link

https://nsnexplorer.com/open/4520/