Manufacturing of sheet metal air-conditioning ducts

Census designationManufacturing of sheet metal air-conditioning ducts (including dust collection ducts), stove pipe, furnace smoke pipe, and elbows

Facility	City	State	Employees	Status
HHeadquarters	Caldwell	ID	20–99	◐ LIKELY ACTIVE
HPHearing Protection LLC	Watertown	WI	—	◐ LIKELY ACTIVE
HCHeavy Crown Forge and Crafts LLC	Havelock	NC	—	◐ LIKELY ACTIVE
HPHelical Products	Santa Maria	CA	20–99	◐ LIKELY ACTIVE
HHenderson	Henderson	TN	100–499	◐ LIKELY ACTIVE
HPH.E. Parmer	Nashville	TN	20–99	◐ LIKELY ACTIVE
HIHercules Industries Inc	Phoenix	AZ	20–99	◐ LIKELY ACTIVE
HCHeritage Construction Services ,inc.	Aiken	SC	—	◐ LIKELY ACTIVE
HRHerman Reeves Textile Sheet Metal, Inc	Gastonia	NC	20–99	◐ LIKELY ACTIVE
HUHermle Usa, INC	Franklin	WI	—	◐ LIKELY ACTIVE
HHH & H Industrial Corporation	Pennsauken	NJ	20–99	◐ LIKELY ACTIVE
HHH & H Industries	Pennsauken	NJ	—	◐ LIKELY ACTIVE
HMHighland Machine	Highland	IL	20–99	◐ LIKELY ACTIVE
HSHighway Safety Corp.	Glastonbury	CT	20–99	◐ LIKELY ACTIVE
HSHighway Safety LLC	Marion	OH	20–99	◐ LIKELY ACTIVE
HPHirschi Powder Coating	North Las Vegas	NV	1–19	◐ LIKELY ACTIVE
Historical Arts & Casting, Inc. Mississippi	Lumberton	MS	1–19	◐ LIKELY ACTIVE
HBHi-tech Bed Systems, Corporation	Wheatland	WY	—	◐ LIKELY ACTIVE
HIHi-Tech Iron Works	Commerce	CA	20–99	◐ LIKELY ACTIVE
HPHi-tech Precision Machining, INC.	San Jose	CA	—	◐ LIKELY ACTIVE
HLHkr, LLC	Catoosa	OK	20–99	◐ LIKELY ACTIVE
HLHnf LLC	Wylie	TX	—	◐ LIKELY ACTIVE
HIHoffman Industries, LLC	Anoka	MN	500+	◐ LIKELY ACTIVE
HMHogan Mfg., INC.	Escalon	CA	—	▲ REPORTED CLOSED
HMHolliston MFG (GTS, HTAS)	Holliston	MA	100–499	◐ LIKELY ACTIVE

FactoryRegistry lists 10,309 facilities whose primary industry classification is one of the 3 industries above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced sheet metal air-conditioning ducts (including dust collection ducts), stove pipe, furnace smoke pipe, and elbows, 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.