Make Heating and Cooling Troubles a Thing of the Past Call on an experienced HVAC contractor in the Effingham, IL area Looking for an HVAC contractor you can depend on? Look no further. Mathy Heating & Air Conditioning Inc. is a family-owned and -operated business serving Effingham, IL and surrounding areas. Our team can fix any HVAC system, so you can stay comfortable in your home. When you hire us for HVAC repairs, you can expect fast, friendly service. Put your heating and cooling problems behind you by calling to schedule a service visit.