- Alpha American Co. - manufacturer of multi-fuel furnaces operated from a thermostat using wood, coal, gas or oil.
- American Heating & Air Supply - selling and installing furnaces and air conditioners.
- Authorized Motion Services - provides HVAC and industrial electronic repair of inverters, variable frequency drives, speed controllers, electric motor drives.
- Charmaster Products - heating systems include wood, wood/oil, wood/gas, and wood/furnace fireplace.
- Control Solutions Inc. - manufactures components and systems for HVAC and building automation using LonWorks and Ethernet SNMP & Modbus/TCP. Product customization and programming available.
- DJ's Total Home Care - heating, air conditioning and other products and services for the do-it-yourself handyman.
- Don's Service of Golden Valley - family owned HVAC contractor with a full line of HVAC equipment.
- Econar Energy Systems Corp - manufacturer of residential/commercial cold climate geothermal heat pumps. Information on environmentally safe and efficient means to heat and cool.
- Ellingson Plumbing Heating & Air Conditioning - plumbing and heating contractor.
- Gartner Refrigeration and Manufacturing - industrial ammonia refrigeration contractor serving the processed foods, food distribution warehouse, cold storage and meat packing industries.
- Heatmor Outdoor Furnaces - manufactures outdoor wood furnaces.
- HiMEC, Inc. - mechanical contractor with departments specializing in piping, HVAC, service, custom sheetmetal fabrication, and mobile crane service.
- Industrial Louvers, Inc. - manufacturers of louvers, equipment screens, grilles, sunscreens and column covers.
- J.H. Larson Electrical Company - electrical, plumbing, HVAC materials. Serving the Upper Midwest.
- Metropolitan Mechanical Contractors, Inc. - from developing commercial and institutional buildings to servicing industrial, manufacturing and warehouse facilities and other building complexes.
- Mavo Systems - industrial abatement with expertise in asbestos, lead, PCB and microbial and HVAC cleaning.
- Nor-Lake Incorporated - refrigeration equipment for foodservice and scientific markets including walk-in coolers, freezers and more.
- Northwest Manufacturing, Inc. - makers of the Wood Master, a hot water outdoor furnace.
- Raydot - serving the agricultural, residential, commercial, and industrial fields with total ventilation systems.
- Shelter Supply/Shelter Source - offers ventilation equipment and specialized energy efficiency products.
- Shurail Supply, Inc. - whosaler of HVAC systems, building tool/supplies and sheet metal.
- State Supply Co. - steam heating, plumbing and complete building maintenance parts and replacement units; troubleshooting guides, video, manuals available.
- Vac System Industries - offers inspecting, cleaning, and decontaminating products, training and services to improve IAQ.
- Weather-Rite, Inc. - offers heating/ventilation, wire enameling equipment, critical process, and conventional HVAC products.
- Woodruff Company - supplying plumbing, heating, and closely related products.
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