Wholesale distributor of Heating, Ventilation, Air Conditioning & Refrigeration equipment, parts and supplies. Insco has been ... proudly serving the HVAC/R market for over 60 years with 35 branches in both Texas and Oklahoma. Insco distributes Ruud residential and commercial equipment throughout most of Texas and Oklahoma City, and the York product line in the greater Houston market. Insco also distributes Mitsubishi ductless technology throughout all of our locations. read more