Honest and dependable service and repairs
Locally owned and operated, D.N.I. Heating, A.C. and Refrigeration, Inc. remains dedicated to value you can trust.
Our wide range of expertise and commitment to quality equipment and workmanship makes us the right choice for new construction installation, upgrades, repairs, and seasonal maintenance. The fully licensed and insured team from D.N.I. Heating, A.C. and Refrigeration, Inc. always finds the best solution based on your specific needs.
Locally owned and operated
Expert Heating & Cooling Services in Longmont, CO and surrounding areas
Give us a call at 303-772-2490 to learn more about opportunities to improve the comfort, convenience, efficiency, and health of your indoor environment. Our specialities include solar energy options, oil to gas conversions, tankless water heating, home automation systems, radiant flooring, snowmelt systems, duct sealing, and so much more.


Quality service
Furnace Replacement in Lafayette, CO | Heating Repair Erie, CO | Air Conditioning Installation Longmont, CO
Professional HVAC Services in Longmont, CO and surrounding areas
Focusing on honesty and dependability, we won’t sell you something you don’t need. Over our 24 years of service, we’ve set ourselves apart as a reliable source for a satisfying and sustainable end result. D.N.I. Heating, A.C. and Refrigeration, Inc. remains available 24/7 and offers prompt response throughout Mead, Longmont, Firestone, Frederick, Loveland, Berthoud, Johnstown, Erie, Lafayette & Louisville, CO.