# FSC 4520 Space and Water Heating Equipment FSC 4520 Space and Water Heating Equipment is a Federal Supply Class in Federal Supply Group 45, Plumbing, Heating, and Waste Disposal Equipment. NSN Explorer tracks 304 NSNs in this class and 58 open solicitations right now. Every figure links to a public U.S. government source record. - NSNs tracked: 304 - Open solicitations: 58 - HTML page: https://nsnexplorer.com/fsc/4520/ - Open demand: https://nsnexplorer.com/open/4520/ - Supply group: https://nsnexplorer.com/group/45/ ## NSNs | NSN | Item name | Page | | --- | --- | --- | | 4520-00-036-5934 | Heater, Space, Electric | [4520-00-036-5934](https://nsnexplorer.com/nsn/4520-00-036-5934/) | | 4520-00-081-7912 | Heating Element, Electrical, Nonim | [4520-00-081-7912](https://nsnexplorer.com/nsn/4520-00-081-7912/) | | 4520-00-113-1963 | Heating Element, Electrical, Nonim | [4520-00-113-1963](https://nsnexplorer.com/nsn/4520-00-113-1963/) | | 4520-00-132-5603 | Heater, Ventilation, Duct Type | [4520-00-132-5603](https://nsnexplorer.com/nsn/4520-00-132-5603/) | | 4520-00-142-2640 | Heating Element, Electrical, Nonim | [4520-00-142-2640](https://nsnexplorer.com/nsn/4520-00-142-2640/) | | 4520-00-177-6198 | Heater, Space, Electric | [4520-00-177-6198](https://nsnexplorer.com/nsn/4520-00-177-6198/) | | 4520-00-185-7021 | Heating Element, Electrical, Nonim | [4520-00-185-7021](https://nsnexplorer.com/nsn/4520-00-185-7021/) | | 4520-00-240-8314 | Heater, Space, Electric | [4520-00-240-8314](https://nsnexplorer.com/nsn/4520-00-240-8314/) | | 4520-00-273-1258 | Heater, Ventilation, Duct Type | [4520-00-273-1258](https://nsnexplorer.com/nsn/4520-00-273-1258/) | | 4520-00-273-1262 | Heater, Ventilation, Duct Type | [4520-00-273-1262](https://nsnexplorer.com/nsn/4520-00-273-1262/) | | 4520-00-273-1265 | Heater, Ventilation, Duct Type | [4520-00-273-1265](https://nsnexplorer.com/nsn/4520-00-273-1265/) | | 4520-00-273-1276 | Heater, Ventilation, Duct Type | [4520-00-273-1276](https://nsnexplorer.com/nsn/4520-00-273-1276/) | | 4520-00-273-1285 | Heater, Ventilation, Duct Type | [4520-00-273-1285](https://nsnexplorer.com/nsn/4520-00-273-1285/) | | 4520-00-277-8339 | Pipe, Air Conditioning-Heating | [4520-00-277-8339](https://nsnexplorer.com/nsn/4520-00-277-8339/) | | 4520-00-300-7805 | Heating Element, Electrical, Immer | [4520-00-300-7805](https://nsnexplorer.com/nsn/4520-00-300-7805/) | | 4520-00-312-2017 | Igniter, Spark, Fuel | [4520-00-312-2017](https://nsnexplorer.com/nsn/4520-00-312-2017/) | | 4520-00-396-1696 | Terminal, Ventilation Duct | [4520-00-396-1696](https://nsnexplorer.com/nsn/4520-00-396-1696/) | | 4520-00-497-1885 | Heating Element, Electrical, Nonim | [4520-00-497-1885](https://nsnexplorer.com/nsn/4520-00-497-1885/) | | 4520-00-498-4174 | Unit Heater, Air Circulating, Stea | [4520-00-498-4174](https://nsnexplorer.com/nsn/4520-00-498-4174/) | | 4520-00-504-8584 | Cover, Housing | [4520-00-504-8584](https://nsnexplorer.com/nsn/4520-00-504-8584/) | | 4520-00-545-3512 | Heating Element, Electrical, Nonim | [4520-00-545-3512](https://nsnexplorer.com/nsn/4520-00-545-3512/) | | 4520-00-552-3716 | Heater, Water, Electric | [4520-00-552-3716](https://nsnexplorer.com/nsn/4520-00-552-3716/) | | 4520-00-740-3428 | Heating Element, Electrical, Immer | [4520-00-740-3428](https://nsnexplorer.com/nsn/4520-00-740-3428/) | | 4520-00-796-4444 | Damper, Flue | [4520-00-796-4444](https://nsnexplorer.com/nsn/4520-00-796-4444/) | | 4520-00-802-8302 | Heating Element, Electrical, Immer | [4520-00-802-8302](https://nsnexplorer.com/nsn/4520-00-802-8302/) | | 4520-00-841-6084 | Heater, Space, Electric | [4520-00-841-6084](https://nsnexplorer.com/nsn/4520-00-841-6084/) | | 4520-00-881-8810 | Heating Element, Electrical, Immer | [4520-00-881-8810](https://nsnexplorer.com/nsn/4520-00-881-8810/) | | 4520-00-887-2753 | Duct Assembly | [4520-00-887-2753](https://nsnexplorer.com/nsn/4520-00-887-2753/) | | 4520-00-976-2253 | Sleeve, Retainer | [4520-00-976-2253](https://nsnexplorer.com/nsn/4520-00-976-2253/) | | 4520-01-062-7355 | Heating Element, Electrical, Immer | [4520-01-062-7355](https://nsnexplorer.com/nsn/4520-01-062-7355/) | | 4520-01-065-2191 | Heater, Water, Gas | [4520-01-065-2191](https://nsnexplorer.com/nsn/4520-01-065-2191/) | | 4520-01-069-8621 | Heating Element, Electrical, Immer | [4520-01-069-8621](https://nsnexplorer.com/nsn/4520-01-069-8621/) | | 4520-01-110-1144 | Heating Element, Electrical, Nonim | [4520-01-110-1144](https://nsnexplorer.com/nsn/4520-01-110-1144/) | | 4520-01-120-7465 | Terminal, Ventilation Duct | [4520-01-120-7465](https://nsnexplorer.com/nsn/4520-01-120-7465/) | | 4520-01-121-0816 | Heating Element, Electrical, Nonim | [4520-01-121-0816](https://nsnexplorer.com/nsn/4520-01-121-0816/) | | 4520-01-133-1581 | Heating Element, Electrical, Nonim | [4520-01-133-1581](https://nsnexplorer.com/nsn/4520-01-133-1581/) | | 4520-01-135-0114 | Heater, Duct Type, Stationary | [4520-01-135-0114](https://nsnexplorer.com/nsn/4520-01-135-0114/) | | 4520-01-137-2469 | Heating Element, Electrical, Nonim | [4520-01-137-2469](https://nsnexplorer.com/nsn/4520-01-137-2469/) | | 4520-01-138-8488 | Heating Element, Electrical, Nonim | [4520-01-138-8488](https://nsnexplorer.com/nsn/4520-01-138-8488/) | | 4520-01-144-0337 | Connector | [4520-01-144-0337](https://nsnexplorer.com/nsn/4520-01-144-0337/) | | 4520-01-144-5140 | Heating Element, Electrical, Nonim | [4520-01-144-5140](https://nsnexplorer.com/nsn/4520-01-144-5140/) | | 4520-01-148-9352 | Heater, Duct Type, Stationary | [4520-01-148-9352](https://nsnexplorer.com/nsn/4520-01-148-9352/) | | 4520-01-151-3295 | Heater, Duct Type, Stationary | [4520-01-151-3295](https://nsnexplorer.com/nsn/4520-01-151-3295/) | | 4520-01-151-4308 | Heating Element, Electrical, Nonim | [4520-01-151-4308](https://nsnexplorer.com/nsn/4520-01-151-4308/) | | 4520-01-155-6971 | Heating Element, Electrical, Nonim | [4520-01-155-6971](https://nsnexplorer.com/nsn/4520-01-155-6971/) | | 4520-01-158-8300 | Heating Element, Electrical, Nonim | [4520-01-158-8300](https://nsnexplorer.com/nsn/4520-01-158-8300/) | | 4520-01-169-4891 | Heating Element, Electrical, Immer | [4520-01-169-4891](https://nsnexplorer.com/nsn/4520-01-169-4891/) | | 4520-01-169-7691 | Rod, Nonmetallic | [4520-01-169-7691](https://nsnexplorer.com/nsn/4520-01-169-7691/) | | 4520-01-169-8647 | Heater, Duct Type, Stationary | [4520-01-169-8647](https://nsnexplorer.com/nsn/4520-01-169-8647/) | | 4520-01-179-9792 | Heating Element, Electrical, Nonim | [4520-01-179-9792](https://nsnexplorer.com/nsn/4520-01-179-9792/) | | 4520-01-181-8723 | Heating Element, Electrical, Nonim | [4520-01-181-8723](https://nsnexplorer.com/nsn/4520-01-181-8723/) | | 4520-01-182-0742 | Heating Element, Electrical, Nonim | [4520-01-182-0742](https://nsnexplorer.com/nsn/4520-01-182-0742/) | | 4520-01-197-2095 | Heater, Immersion, Liquid Fuel Fir | [4520-01-197-2095](https://nsnexplorer.com/nsn/4520-01-197-2095/) | | 4520-01-197-6836 | Heating Element, Electrical, Nonim | [4520-01-197-6836](https://nsnexplorer.com/nsn/4520-01-197-6836/) | | 4520-01-197-7112 | Heating Element, Electrical, Nonim | [4520-01-197-7112](https://nsnexplorer.com/nsn/4520-01-197-7112/) | | 4520-01-197-8399 | Heating Element, Electrical, Immer | [4520-01-197-8399](https://nsnexplorer.com/nsn/4520-01-197-8399/) | | 4520-01-198-0737 | Heater, Duct Type, Stationary | [4520-01-198-0737](https://nsnexplorer.com/nsn/4520-01-198-0737/) | | 4520-01-207-1159 | Heater, Water, Electric | [4520-01-207-1159](https://nsnexplorer.com/nsn/4520-01-207-1159/) | | 4520-01-211-4368 | Heating Element, Electrical, Nonim | [4520-01-211-4368](https://nsnexplorer.com/nsn/4520-01-211-4368/) | | 4520-01-213-1247 | Pipe, Air Conditioning-Heating | [4520-01-213-1247](https://nsnexplorer.com/nsn/4520-01-213-1247/) | | 4520-01-213-7986 | Heating Element, Electrical, Nonim | [4520-01-213-7986](https://nsnexplorer.com/nsn/4520-01-213-7986/) | | 4520-01-216-9316 | Heating Element, Electrical, Nonim | [4520-01-216-9316](https://nsnexplorer.com/nsn/4520-01-216-9316/) | | 4520-01-219-6486 | Heating Element, Electrical, Nonim | [4520-01-219-6486](https://nsnexplorer.com/nsn/4520-01-219-6486/) | | 4520-01-224-7299 | Heating Element, Electrical, Nonim | [4520-01-224-7299](https://nsnexplorer.com/nsn/4520-01-224-7299/) | | 4520-01-228-9515 | Heating Element, Electrical, Nonim | [4520-01-228-9515](https://nsnexplorer.com/nsn/4520-01-228-9515/) | | 4520-01-229-8985 | Heating Element, Electrical, Nonim | [4520-01-229-8985](https://nsnexplorer.com/nsn/4520-01-229-8985/) | | 4520-01-230-8901 | Heating Element, Electrical, Nonim | [4520-01-230-8901](https://nsnexplorer.com/nsn/4520-01-230-8901/) | | 4520-01-232-5614 | Heating Element, Electrical, Nonim | [4520-01-232-5614](https://nsnexplorer.com/nsn/4520-01-232-5614/) | | 4520-01-232-9768 | Heating Element, Electrical, Nonim | [4520-01-232-9768](https://nsnexplorer.com/nsn/4520-01-232-9768/) | | 4520-01-236-2854 | Heater, Water, Electric | [4520-01-236-2854](https://nsnexplorer.com/nsn/4520-01-236-2854/) | | 4520-01-236-4363 | Heating Element, Electrical, Immer | [4520-01-236-4363](https://nsnexplorer.com/nsn/4520-01-236-4363/) | | 4520-01-242-1646 | Carburetor, Heater | [4520-01-242-1646](https://nsnexplorer.com/nsn/4520-01-242-1646/) | | 4520-01-247-1437 | Heater, Duct Type, Stationary | [4520-01-247-1437](https://nsnexplorer.com/nsn/4520-01-247-1437/) | | 4520-01-250-4078 | Heater, Space, Electric | [4520-01-250-4078](https://nsnexplorer.com/nsn/4520-01-250-4078/) | | 4520-01-254-4855 | Heating Element, Electrical, Nonim | [4520-01-254-4855](https://nsnexplorer.com/nsn/4520-01-254-4855/) | | 4520-01-257-7866 | Heating Element, Electrical, Nonim | [4520-01-257-7866](https://nsnexplorer.com/nsn/4520-01-257-7866/) | | 4520-01-257-9763 | Heating Element, Electrical, Immer | [4520-01-257-9763](https://nsnexplorer.com/nsn/4520-01-257-9763/) | | 4520-01-260-3257 | Heater, Duct Type, Stationary | [4520-01-260-3257](https://nsnexplorer.com/nsn/4520-01-260-3257/) | | 4520-01-262-7712 | Heater, Water, Electric | [4520-01-262-7712](https://nsnexplorer.com/nsn/4520-01-262-7712/) | | 4520-01-269-7834 | Heater, Space, Electric | [4520-01-269-7834](https://nsnexplorer.com/nsn/4520-01-269-7834/) | | 4520-01-275-9086 | Heater, Space, Electric | [4520-01-275-9086](https://nsnexplorer.com/nsn/4520-01-275-9086/) | | 4520-01-275-9087 | Heater, Space, Electric | [4520-01-275-9087](https://nsnexplorer.com/nsn/4520-01-275-9087/) | | 4520-01-277-8532 | Heating Element, Electrical, Nonim | [4520-01-277-8532](https://nsnexplorer.com/nsn/4520-01-277-8532/) | | 4520-01-278-0916 | Igniter, Spark, Fuel | [4520-01-278-0916](https://nsnexplorer.com/nsn/4520-01-278-0916/) | | 4520-01-278-9931 | Reducer, Air Conditioning-Heating | [4520-01-278-9931](https://nsnexplorer.com/nsn/4520-01-278-9931/) | | 4520-01-286-8565 | Heating Element, Electrical, Nonim | [4520-01-286-8565](https://nsnexplorer.com/nsn/4520-01-286-8565/) | | 4520-01-287-3991 | Heater, Duct Type, Stationary | [4520-01-287-3991](https://nsnexplorer.com/nsn/4520-01-287-3991/) | | 4520-01-289-1508 | Heating Element, Electrical, Nonim | [4520-01-289-1508](https://nsnexplorer.com/nsn/4520-01-289-1508/) | | 4520-01-297-0121 | Heating Element, Electrical, Nonim | [4520-01-297-0121](https://nsnexplorer.com/nsn/4520-01-297-0121/) | | 4520-01-299-3607 | Heating Element, Electrical, Nonim | [4520-01-299-3607](https://nsnexplorer.com/nsn/4520-01-299-3607/) | | 4520-01-302-4390 | Heating Element, Electrical, Immer | [4520-01-302-4390](https://nsnexplorer.com/nsn/4520-01-302-4390/) | | 4520-01-302-5300 | Heater, Immersion, Liquid Fuel Fir | [4520-01-302-5300](https://nsnexplorer.com/nsn/4520-01-302-5300/) | | 4520-01-302-5301 | Heater, Immersion, Liquid Fuel Fir | [4520-01-302-5301](https://nsnexplorer.com/nsn/4520-01-302-5301/) | | 4520-01-303-1172 | Heating Element, Electrical, Nonim | [4520-01-303-1172](https://nsnexplorer.com/nsn/4520-01-303-1172/) | | 4520-01-303-1173 | Heating Element, Electrical, Nonim | [4520-01-303-1173](https://nsnexplorer.com/nsn/4520-01-303-1173/) | | 4520-01-303-4195 | Heater, Immersion, Liquid Fuel Fir | [4520-01-303-4195](https://nsnexplorer.com/nsn/4520-01-303-4195/) | | 4520-01-304-4255 | Heater, Water, Electric | [4520-01-304-4255](https://nsnexplorer.com/nsn/4520-01-304-4255/) | | 4520-01-305-0090 | Heating Element, Electrical, Immer | [4520-01-305-0090](https://nsnexplorer.com/nsn/4520-01-305-0090/) | | 4520-01-306-7634 | Heater, Immersion, Liquid Fuel Fir | [4520-01-306-7634](https://nsnexplorer.com/nsn/4520-01-306-7634/) | | 4520-01-310-0693 | Heating Element, Electrical, Nonim | [4520-01-310-0693](https://nsnexplorer.com/nsn/4520-01-310-0693/) | | 4520-01-310-8279 | Heating Element, Electrical, Nonim | [4520-01-310-8279](https://nsnexplorer.com/nsn/4520-01-310-8279/) | | 4520-01-312-4138 | Heater, Immersion, Liquid Fuel Fir | [4520-01-312-4138](https://nsnexplorer.com/nsn/4520-01-312-4138/) | | 4520-01-314-2099 | Heating Element, Electrical, Nonim | [4520-01-314-2099](https://nsnexplorer.com/nsn/4520-01-314-2099/) | | 4520-01-316-2443 | Heating Element, Electrical, Nonim | [4520-01-316-2443](https://nsnexplorer.com/nsn/4520-01-316-2443/) | | 4520-01-317-8875 | Heating Element, Electrical, Nonim | [4520-01-317-8875](https://nsnexplorer.com/nsn/4520-01-317-8875/) | | 4520-01-317-8979 | Heater, Water, Electric | [4520-01-317-8979](https://nsnexplorer.com/nsn/4520-01-317-8979/) | | 4520-01-324-0519 | Heating Element, Electrical, Immer | [4520-01-324-0519](https://nsnexplorer.com/nsn/4520-01-324-0519/) | | 4520-01-324-7714 | Pumping Unit, Condensate, Heating- | [4520-01-324-7714](https://nsnexplorer.com/nsn/4520-01-324-7714/) | | 4520-01-326-6724 | Heater, Duct Type, Stationary | [4520-01-326-6724](https://nsnexplorer.com/nsn/4520-01-326-6724/) | | 4520-01-327-9705 | Heating Element, Electrical, Immer | [4520-01-327-9705](https://nsnexplorer.com/nsn/4520-01-327-9705/) | | 4520-01-328-5729 | Heating Element, Electrical, Nonim | [4520-01-328-5729](https://nsnexplorer.com/nsn/4520-01-328-5729/) | | 4520-01-328-6083 | Heating Element, Electrical, Immer | [4520-01-328-6083](https://nsnexplorer.com/nsn/4520-01-328-6083/) | | 4520-01-330-5906 | Heating Element, Electrical, Nonim | [4520-01-330-5906](https://nsnexplorer.com/nsn/4520-01-330-5906/) | | 4520-01-332-6786 | Heater, Space, Electric | [4520-01-332-6786](https://nsnexplorer.com/nsn/4520-01-332-6786/) | | 4520-01-333-1937 | Heating Element, Electrical, Nonim | [4520-01-333-1937](https://nsnexplorer.com/nsn/4520-01-333-1937/) | | 4520-01-339-5949 | Heating Element, Electrical, Nonim | [4520-01-339-5949](https://nsnexplorer.com/nsn/4520-01-339-5949/) | | 4520-01-340-5071 | Heating Element, Electrical, Nonim | [4520-01-340-5071](https://nsnexplorer.com/nsn/4520-01-340-5071/) | | 4520-01-345-4969 | Heating Element, Electrical, Nonim | [4520-01-345-4969](https://nsnexplorer.com/nsn/4520-01-345-4969/) | | 4520-01-348-8937 | Heater, Space, Electric | [4520-01-348-8937](https://nsnexplorer.com/nsn/4520-01-348-8937/) | | 4520-01-353-0325 | Heating Element, Electrical, Nonim | [4520-01-353-0325](https://nsnexplorer.com/nsn/4520-01-353-0325/) | | 4520-01-370-5933 | Heating Element, Electrical, Nonim | [4520-01-370-5933](https://nsnexplorer.com/nsn/4520-01-370-5933/) | | 4520-01-371-8081 | Heater, Duct Type, Stationary | [4520-01-371-8081](https://nsnexplorer.com/nsn/4520-01-371-8081/) | | 4520-01-373-0533 | Latch, Heater Door | [4520-01-373-0533](https://nsnexplorer.com/nsn/4520-01-373-0533/) | | 4520-01-374-5421 | Heating Element, Electrical, Nonim | [4520-01-374-5421](https://nsnexplorer.com/nsn/4520-01-374-5421/) | | 4520-01-377-9006 | Heating Element, Electrical, Nonim | [4520-01-377-9006](https://nsnexplorer.com/nsn/4520-01-377-9006/) | | 4520-01-391-8325 | Heating Element, Electrical, Nonim | 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