Applegate Heating & Air Conditioning specializes in heating, air conditioning, and sheet metal work. It serves residential, commercial, and industrial projects. It specializes in sheet metal design, fabrication, and installation for projects of all sizes, ranging from $100 to $25,000,000.

DUCTZ has been providing industry-leading air duct cleaning and HVAC restoration services for residential and commercial properties alike.

DuraVent is the recognized technological leader in the venting industry. Consistently first to market with new innovations, DuraVent is committed to providing safe and technologically advanced venting.

Gallagher-Kaiser Corporation (GK) is a privately owned, Michigan based turn-key supplier of paint finishing systems, commercial & industrial HVAC and mechanical automotive systems within the Kaiser Enterprise.

Grand Traverse Refrigeration, Inc., has been providing heating, cooling, and refrigeration services to customers in the Traverse City and the surrounding areas. They are the HVACR company. They service, repair, install, maintain and design all makes and models of heating and air conditioning systems.

GREEN LINK is an innovative engineering company that develops and produces polymeric architectural products for the construction and HVAC industry. They work with contractors, architects, building owners and facility managers to engineer and produce the best possible solutions to meet the construction challenges.

Haisma Heating & Cooling Inc. is an HVAC company serving West Michigan. The company was established by Garry Haisma, a Northwest side Grand Rapids area native, in 1981.

Hart & Cooley has been a trusted brands for HVAC supplies in the industry. Their products are stocked across North America to provide the customer with a winning, comprehensive solution for business - on time. Their brands include AmeriFlow, AmeriVent, AMPCO, Hart & Cooley, Lima, Milcor, PortalsPlus, Roof Products & Systems (RPS) and Ward Industries.

SANI-VAC Service provides high-quality indoor air cleaning services, including HVAC units, air ducts, and kitchen exhaust cleaning for commercial, industrial, and institutional organizations. It offer much heating and cooling cleaning services including air duct cleaning, ventilation cleaning, coil cleaning, HVAC cleaning, commercial kitchen exhaust degreasing, cooling tower cleaning, and ductwork inspections.