Experience. Service. Quality.   Welcome to Gustafson Heating & A/C Inc.  We have proudly served the Denver metro area since 1971!  From Castle Rock to Longmont and all points in between, we can help you with your heating, cooling and indoor air quality needs. Founded by Jack Gustafson, active in the company until 2006, we are still locally owned and operated.  Jack established a successful operation with much hard work, loyal employees and by being innovative in his approach to the HVAC business.  We strive daily to emulate the standard he set. We are licensed throughout the metro area.  Give us a call to help you design, install and service your Rheem or Carrier home comfort system.