Our HVAC experience is second to none. Whether you need parts, repairs, service, or installation, CSTK can deliver the HVAC solutions you need.

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HVAC Brands

Red Dot HVAC Solutions

Red Dot produces premium mobile HVAC units and components for a wide range of vehicles and heavy equipment. CSTK offers aftermarket heater and air conditioning solutions for equipment in construction, agriculture, mining, trucking, motor coaches, fire/rescue, any many other industries. Red Dot aftermarket HVAC systems are available at any CSTK location, as well as HVAC replacement parts.

Eberspaecher (Espar) Heater Systems

Eberspaecher (Espar) Heater Systems offers a comprehensive range of aftermarket heater products, including:

  • Independent and compact fuel operated air and coolant heaters
  • Electrical vehicle heater systems
  • Bus HVAC systems Espar supplies aftermarket heater and HVAC solutions to the truck, bus, marine, automotive/pick-ups, off-highway, cargo and military markets.


Eberspaecher’s AIRTRONIC Air Heaters
Eberspaecher’s air heaters are independent of both the engine and of the vehicle’s own heat balance. They draw in cool room or outside air, heat this up and then deliver it to the interior of the vehicle. Air heaters are an excellent solution for commercial vehicles of every type.

Eberspaecher’s HYDRONIC Coolant Heaters
Eberspaecher’s coolant heaters work independently of the engine and thus offer a double plus: pre-heating the vehicle’s passenger compartment and the engine. The heaters are integrated in the cooling system of the engine. The thermal energy gained is then distributed through the vehicle’s own heat exchanger as forced hot air and this heats the interior of the vehicle via existing air vents. The engine is warmed up with the residual heat in the cooling water.

Kysor HVAC Solutions

CSTK offers Kysor HVAC systems and solutions for medium and heavy-duty trucks, buses and other vehicles. We offer a vast inventory of Kysor original equipment manufacturer (OEM) and aftermarket parts for many vehicle types.

Webasto Heating Solutions

Webasto manufactures heating solutions for a wide variety of vehicles and equipment. Webasto cab and coolant heaters serve light, medium, and heavy-duty vehicles. In addition, Webasto also offers HVAC solutions for bus, marine, off-highway equipment, recreational vehicles, and more.

Parts and Service

Every product we sell comes with the support and expertise of our CSTK expert technicians. We carry large inventories of parts and accessories for every brand we sell, and also has easy online access to the complete line in order to get you what you need, when you need it. Contact your local CSTK dealership for answers to your parts and service questions.

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Applications and Industries

Your business depends on keeping your machines on the road and running smoothly. But heating and air conditioning problems, especially in extreme weather, can lead to costly downtime and unfulfilled orders. No matter the industry, no matter the application, there is no company more trusted and skilled at diagnosing, fixing, and maintaining your air conditioning and heating systems. 

Latest News


As Summer sets in and temperatures rise, it is critically important for businesses to protect their employees, equipment, and operations by maintaining their air conditioning units. If your business

2020 CSTK HVAC Clinic

The CSTK St. Louis facility recently had the privilege of hosting our 2020 HVAC Clinic. Participants from all over the region came together to learn about issues and get trouble-shooting tips about