Heating and air conditioning parts, supplies, services, and installations. Air filter manufacturer of custom and odd sizes. One of the Midwest's largest and preferred distributor of air filters. We carry in stock over 100,000 air filters packed in our 30,000 square foot warehouse and can ship from stock virtually any air filter for HVAC applications. We also manufacture special size, odd size and custom air filters to order. Check out all the other items we stock, too! Heating and air conditioning service, repairs, and installations. Wholesale and retail heating and air conditioning parts. DIY ignitors, ignition modules, control boards, flame sensors, inducer assemblies, gas valves and lots of other HVAC parts and supplies.