4520-01-696-0787
HEATER,FLUID,ELECTRIC
Open · closes in 1d 1 units
1 solicitation (1 open · 0 closed)
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.
35
Open solicitations
35
Closing within 7 days
6,501
Total open quantity
134
Tracked all-time (99 closed)
Open parts
4520-01-340-5071
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 1d 14 units
1 solicitation (1 open · 0 closed)
4520-01-539-7164
CONTROL BOX,OPERATO
Open · closes in 1d 14 units
1 solicitation (1 open · 0 closed)
4520-15-035-1321
HEATER, WATER, LIQUID FU
Open · closes in 1d 2 units
2 solicitations (1 open · 1 closed)
4520-01-304-4255
HEATER,WATER,ELECTRIC
Open · closes in 4d 1 units
2 solicitations (1 open · 1 closed)
4520-01-254-4855
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 2 units
1 solicitation (1 open · 0 closed)
4520-01-135-0114
HEATER,DUCT TYPE,STATIONARY
Open · closes in 7d 4 units
1 solicitation (1 open · 0 closed)
4520-00-545-3512
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 28 units
1 solicitation (1 open · 0 closed)
4520-01-219-6486
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 15 units
1 solicitation (1 open · 0 closed)
4520-01-216-9316
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 6,000 units
2 solicitations (1 open · 1 closed)
4520-01-412-9556
PIPE,AIR CONDITIONING-HEATING
Open · closes in 7d 1 units
1 solicitation (1 open · 0 closed)
4520-01-419-2568
HEATER,SPACE,ELECTRIC
Open · closes in 7d 21 units
1 solicitation (1 open · 0 closed)
4520-01-232-9768
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 17 units
1 solicitation (1 open · 0 closed)
4520-01-257-9763
HEATING ELEMENT,ELECTRICAL,IMMER
Open · closes in 7d 1 units
1 solicitation (1 open · 0 closed)
4520-01-317-8875
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 52 units
1 solicitation (1 open · 0 closed)
4520-01-302-5301
HEATER,IMMERSION,LIQUID FUEL FIR
Open · closes in 7d 9 units
1 solicitation (1 open · 0 closed)
4520-01-236-4363
HEATING ELEMENT,ELECTRICAL,IMMER
Open · closes in 7d 1 units
1 solicitation (1 open · 0 closed)
4520-01-505-3098
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 16 units
1 solicitation (1 open · 0 closed)
4520-01-247-1437
HEATER,DUCT TYPE,STATIONARY
Open · closes in 7d 6 units
1 solicitation (1 open · 0 closed)
4520-01-628-3360
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 37 units
1 solicitation (1 open · 0 closed)
4520-01-584-5207
HEATER,SPACE,ELECTRIC
Open · closes in 7d 2 units
1 solicitation (1 open · 0 closed)
4520-01-646-3534
HEATER,WATER,STEAM AND ELECTRIC
Open · closes in 7d 15 units
1 solicitation (1 open · 0 closed)
4520-01-597-3589
HEATING ELEMENT,ELECTRICAL,IMMER
Open · closes in 7d 22 units
1 solicitation (1 open · 0 closed)
4520-01-579-9647
HEATING ELEMENT,ELECTRICAL,IMMER
Open · closes in 7d 49 units
1 solicitation (1 open · 0 closed)
4520-01-133-1581
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 13 units
1 solicitation (1 open · 0 closed)
4520-00-177-6198
HEATER,SPACE,ELECTRIC
Open · closes in 7d 22 units
1 solicitation (1 open · 0 closed)
4520-01-148-9352
HEATER,DUCT TYPE,STATIONARY
Open · closes in 7d 3 units
1 solicitation (1 open · 0 closed)
4520-00-081-7912
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 18 units
1 solicitation (1 open · 0 closed)
4520-01-197-6836
HEATING ELEMENT,ELECTRICAL,NONIM
Open · closes in 7d 19 units
1 solicitation (1 open · 0 closed)
4520-01-110-1144
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Sep 3, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-646-6327
HEATER,SPACE,ELECTRIC
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-00-504-8584
COVER,HOUSING
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-457-8884
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-590-0807
HEATING BLANKET,ELECTRICAL
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-00-497-1885
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 31, 2026 — units
3 solicitations (0 open · 3 closed)
4520-01-169-4891
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-224-7299
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-278-0916
IGNITER,SPARK,FUEL
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-468-7419
HEATER,SPACE,ELECTRIC
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-592-2632
HEATING BLANKET,ELECTRICAL
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-302-5300
HEATER,IMMERSION,LIQUID FUEL FIR
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-645-3262
HEATER,SPACE,ELECTRIC
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-00-300-7805
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 31, 2026 — units
1 solicitation (0 open · 1 closed)
4520-00-552-3716
HEATER,WATER,ELECTRIC
Closed · last Aug 30, 2026 — units
1 solicitation (0 open · 1 closed)
4520-00-273-1265
HEATER,VENTILATION,DUCT TYPE
Closed · last Aug 30, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-595-4288
COLLAR,AIR CONDITIONING-HEATING
Closed · last Aug 28, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-182-0742
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 28, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-181-8723
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 28, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-540-7938
HEATER,WATER,ELECTRIC
Closed · last Aug 28, 2026 — units
2 solicitations (0 open · 2 closed)
4520-00-802-8302
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 28, 2026 — units
2 solicitations (0 open · 2 closed)
4520-01-151-3295
HEATER,DUCT TYPE,STATIONARY
Closed · last Aug 28, 2026 — units
2 solicitations (0 open · 2 closed)
4520-01-470-0784
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 28, 2026 — units
2 solicitations (0 open · 2 closed)
4520-01-481-6789
PIPE,AIR CONDITIONING-HEATING
Closed · last Aug 25, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-706-8039
HEATING BLANKET,ELECTRICAL
Closed · last Aug 25, 2026 — units
1 solicitation (0 open · 1 closed)
4520-20-004-2192
HEATING ELEMENT, ELE
Closed · last Aug 24, 2026 — units
2 solicitations (0 open · 2 closed)
4520-01-445-6856
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 24, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-452-6092
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 24, 2026 — units
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)
4520-01-328-5729
HEATING ELEMENT,ELECTRICAL,NONIM
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
1 solicitation (0 open · 1 closed)
4520-01-474-2136
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 24, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-158-8300
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 24, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-572-5558
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 24, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-503-6626
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 24, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-605-6764
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 24, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-513-1562
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 21, 2026 — units
1 solicitation (0 open · 1 closed)
4520-00-185-7021
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 21, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-306-7634
HEATER,IMMERSION,LIQUID FUEL FIR
Closed · last Aug 20, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-487-1662
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 20, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-556-2651
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 20, 2026 — units
2 solicitations (0 open · 2 closed)
4520-01-213-7986
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 19, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-560-4427
HEATER,WATER,ELECTRIC
Closed · last Aug 18, 2026 — units
2 solicitations (0 open · 2 closed)
4520-01-556-2107
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 18, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-556-2643
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 18, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-556-2121
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 18, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-556-2662
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 18, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-269-7834
HEATER,SPACE,ELECTRIC
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-596-6656
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-137-2469
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-151-4308
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-299-3607
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-486-2925
HEATER,WATER,ELECTRIC
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-508-5743
SHC HOSE ASSY
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-555-7578
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-310-0693
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-590-0756
HEATING BLANKET,ELECTRICAL
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-590-0897
HEATING BLANKET,ELECTRICAL
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-557-4617
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-592-2651
HEATING BLANKET,ELECTRICAL
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-690-4732
BURNER ASSEMBLY,SPACE HEATER
Closed · last Aug 17, 2026 — units
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
1 solicitation (0 open · 1 closed)
4520-01-590-7140
HEATER,WATER,ELECTRIC
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-592-2658
HEATING BLANKET,ELECTRICAL
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-699-9873
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-493-2781
SHC SENSOR FLAME
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-00-273-1258
HEATER,VENTILATION,DUCT TYPE
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-455-7570
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-062-7355
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-069-8621
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-326-6724
HEATER,DUCT TYPE,STATIONARY
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-467-0773
HEATER,IMMERSION,LIQUID FUEL FIR
Closed · last Aug 17, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-197-7112
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 13, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-493-5979
HEATER,WATER,ELECTRIC
Closed · last Aug 13, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-602-5269
HEATING ELEMENT
Closed · last Aug 12, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-391-8325
HEATING ELEMENT,ELECTRICAL,NONIM
Closed · last Aug 11, 2026 — units
1 solicitation (0 open · 1 closed)
4520-01-582-5652
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 7, 2026 — units
2 solicitations (0 open · 2 closed)
4520-01-597-5224
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 6, 2026 — units
1 solicitation (0 open · 1 closed)
4520-00-740-3428
HEATING ELEMENT,ELECTRICAL,IMMER
Closed · last Aug 6, 2026 — units
1 solicitation (0 open · 1 closed)