JM Heating and Cooling is most trusted HVAC company and offering professional HVAC services to Longmont, Colorado and the surrounding cities for over 10 years. No job is too big or small for JM Heating and Cooling. We even offer same day service on many of our HVAC services. You will be comfortable with us. JM Heating and Cooling provides a wide variety of HVAC services, including heating and furnace installation, heating and furnace repairs, heating and furnace maintenance, air conditioning repairs, air conditioning maintenance, and air conditioning installation.