Manufacturing of steel heating boilers (15 psi or less), and all other hot water heating boilers (excluding parts)

Facility	City	State	Employees	Status
Hapco INC	Kent	OH	20–99	● ACTIVE
Heatron, INC	Leavenworth	KS	—	● ACTIVE
Hi-heat Industries, INC.	Lewistown	MT	—	● ACTIVE
Indeeco LLC	Saint Louis	MO	—	● ACTIVE
Josephson Manufacturing Company	Fort Dodge	IA	—	● ACTIVE
Ldj Manufacturing, INC.	Pella	IA	—	● ACTIVE
MSMamac Systems, INC.	Chanhassen	MN	20–99	● ACTIVE
Melco Steel INC	Azusa	CA	—	● ACTIVE
Messersmith Manufacturing, INC.	Bark River	MI	—	● ACTIVE
Neptech, INC.	Highland	MI	—	● ACTIVE
New Buck CORP	Spruce Pine	NC	—	● ACTIVE
O2 Cool Manufacturing LLC	Decatur	TX	20–99	● ACTIVE
Precision Control Systems INC	Eden Prairie	MN	—	● ACTIVE
Ramda Metal Specialties, INC.	Gardena	CA	—	● ACTIVE
Rock Energy Systems LLC	Janesville	WI	100–499	● ACTIVE
SSScully Signal Company	Wilmington	MA	—	● ACTIVE
TETayco Engineering, INC.	Cypress	CA	—	● ACTIVE
Tempco Electric Heater Corporation	Wood Dale	IL	—	● ACTIVE
TEThe Electric Heater CO	Stratford	CT	—	● ACTIVE
TPThermetic Products, INC.	Minneapolis	MN	—	● ACTIVE
Tri Fab Associates, INC	Fremont	CA	—	● ACTIVE
TLTutco, LLC	Cookeville	TN	—	● ACTIVE
UPUS Precision Sheet Metal, INC.	Riverside	CA	—	● ACTIVE
Watlow Electric Manufacturing CO	Saint Louis	MO	100–499	● ACTIVE
Accu-therm LLC	Saint Louis	MO	—	● ACTIVE

FactoryRegistry lists 542 facilities whose primary industry classification is one of the 1 industry above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced steel heating boilers (15 psi or less), and all other hot water heating boilers (excluding parts), in the shares shown above, and does not say which establishments. Where a plant’s own website or a federal registry names what that plant makes, it appears on the plant’s own page with the source named.