Harster Heating & Air Conditioning is an HVAC company based in St Louis, MO, providing air conditioning and furnace repair services. They have a large fleet of over 100 service vans ready to offer same-day service. The company employs highly trained technicians with more than 35 years of experience, focusing on customer satisfaction and community commitment.

Tri-State Mechanical Services, Inc. is a family-owned mechanical contractor based in St. Louis, MO, providing HVAC, refrigeration, piping, ventilation, and steel fabrication services. Serving commercial, industrial, and residential clients, they offer installation, repair, and maintenance for air conditioning, furnaces, boilers, and commercial refrigeration systems. With over 30 years of experience since 1989, they support a wide range of equipment brands and maintain a large parts inventory to ensure timely service. Tri-State Mechanical Services also offers 24/7 emergency service to address urgent mechanical needs.

Kiefer Heating & Cooling, Inc. has been serving the St Louis, MO area since 1927. They provide HVAC repair and installation services, including air conditioning, furnace, and heat pump systems. The company specializes in custom ductwork and sheet metal repairs to improve system efficiency and offers complete comfort system installations for homes and offices.

O'Dell Service Co is a commercial HVAC and refrigeration company based in Kansas City, MO. Serving the Greater Kansas City Area, they offer a wide range of services including heating, air conditioning, ventilation, and refrigeration system installation, maintenance, and repair. Established in 1965, O'Dell has nearly six decades of experience and provides 24/7 emergency services to ensure businesses remain operational at all times. Their skilled, union-affiliated team also supports specialized laboratory equipment maintenance and commercial ventilation solutions to improve indoor air quality.

Bieg Plumbing and Mechanical is a full-service plumbing and HVAC company serving St Louis, MO. Established in 1960, the company offers heating and air conditioning installation, replacement, maintenance, and repair services alongside plumbing solutions. They provide hydro jetting to clear and clean pipes effectively without harsh chemicals. Bieg Plumbing and Mechanical also offers 24/7 emergency service to address urgent needs.

Westside Heat & Aire Inc is a full-service HVAC contractor based in Kansas City, MO, offering residential and commercial heating and cooling solutions. They provide repair, installation, and tune-up services for air conditioners, furnaces, heat pumps, and geothermal heat pump systems. The company specializes in Rheem home comfort systems and Climate Master geothermal heat pumps, which use the earth's constant temperature for efficient heating and cooling. With over twenty years of combined experience, Westside Heat & Aire Inc also offers 24-hour emergency service for unexpected HVAC issues.

Baer Heating & Cooling Inc is a family-owned HVAC contractor serving St Louis, MO, and the Illinois Metro-East Area since 2006. They provide installation, repair, and tune-up services for air conditioning, furnaces, heat pumps, boilers, mini splits, and geothermal heat pumps. The company serves residential, commercial, and industrial clients across multiple counties in Illinois. Baer Heating & Cooling is known for servicing all makes and models and emphasizes professionalism, integrity, and honesty in their work.

Grabill Plumbing, Heating and Cooling, Inc. is a third-generation family business serving Kansas City, MO, since 1986. They provide a wide range of plumbing and HVAC services for both residential and commercial clients, including air conditioning and furnace repair, installation, and maintenance. The company is experienced in handling complex commercial plumbing projects and offers custom HVAC system designs, including solutions for older homes. Their capabilities include boiler repair and specialized plumbing installations such as radiant floor heating and steam showers.

1-Call Heating and Cooling, LLC is a full-service HVAC company based in St. Louis, MO. They provide heating and cooling repair, installation, and maintenance services for homes throughout the St. Louis metro area and surrounding Illinois communities. Their offerings include furnace and air conditioner repairs, complete HVAC system installations including ductless mini-splits, indoor air quality solutions, and professional air duct cleaning to improve airflow and system efficiency. The company services all makes and brands of HVAC equipment and provides honest recommendations to help customers make informed decisions. They are a Goodman dealer and Daikin-associated installer, holding EPA and A2L certifications for safe and compliant service. Same-day service options are available when possible to address urgent HVAC needs.

Rios Heating & Cooling provides thermostat installation services in St Louis, MO. They specialize in installing smart thermostats that offer learning capabilities to adjust heating and cooling based on household patterns. These devices also allow remote temperature control via smartphones, helping homeowners manage comfort and energy use more efficiently.