Temperature Equipment Corporation is a wholesale HVAC distribution company headquartered in Lansing, IL, serving Chicagoland and NW Indiana. We are Chicago's One Stop Shop for all HVAC needs from residential to commercial to industrial including equipment, hvac solutions, hydronics, controls, parts and supplies. TEC is your high efficiency expert, with the highest efficiency equipment available in the industry. Condensing units up to 21 SEER, furnaces up to 96.6% efficiency and rooftops with EER's of over 11. Complementing its HVAC business, TEC - Properties leases office and warehouse space to a variety of tenants.