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HVAC service you can trust

We provide expert commercial/residential HVAC, commercial refrigeration/restaurant equipment, boilers, hot water heaters & more in Longmont, Boulder, Loveland and surrounding areas.

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$65 AC or Furnace Inspection
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Featured Services


We make sure there’s no reason to live with anything less than peak performance from your heater.

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Air Conditioning

Our focus is the reliable, efficient, and long-term performance of your air conditioner.

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Commercial HVAC

We provide business owners in with a dependable source for a full range of commercial HVAC options.

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New Construction

We offer ease of system management, exceptional energy savings, personalized control, and ideal and consistent comfort.

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Indoor Air Quality

From airborne contaminants to energy waste, odors, and more, we deliver satisfying and sustainable improvement.

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Commercial Refrigeration

We provide business owners in with a dependable source for a full range of commercial refrigeration options.

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hvac company in Longmont, Boulder, and Loveland Colorado

Honest and dependable HVAC service and repairs

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.

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Locally owned and operated

A Factory-Trained HVAC Company

Expert Heating & Cooling Services in Longmont, Boulder, Loveland 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 tankless water heating, home automation systems, radiant flooring, duct sealing, and so much more.

Friendly and Timely Heating & Cooling Services

Professional HVAC Services in Longmont, Boulder, Loveland and surrounding areas

Focusing on honesty and dependability, we won’t sell you something you don’t need. Over our 25 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 Longmont, Boulder, and Loveland Colorado.

What our clients are saying

R. Larson

Extremely happy with my decision to use DNI. Installed cash price of my new furnace & AC unit was about 23% lower than the competition. Chris was very knowledgeable, conscientious, and top notch! The whole crew was excellent!

M. Southworth

DNI Heating got out to my house, assessed the problem and installed a new furnace for us within hours on a Friday afternoon. We did not have to worry about the 0 degree temperatures coming in that weekend. The service was great from the minute I called to helping us register our furnace.

D. Johnson

This crew has saved me on multiple occasions. From heating to ac service they have done it all for me. Always great customer service and a quick response time! Thanks for the continued great service DNI!

K. Kitten

Trustworthy, fair and will advocate for their clients. Whether it is maintenance or replacement DNI is wonderful. As a small business, the options are limited and expensive for replacing a unit that is original to the building. Chris L. worked exceptionally hard to ensure that our needs were met, ultimately finding the most cost effective solution.

R. Barcklow

DNI and Chris specifically were amazing. My furnace went out with the first Colorado storm and they were able to come out the next day and provided me with honest, transparent service so I could make the best decision for my budget. There was never any pressure from Chris between buying a new furnace and fixing my old one. I felt like they were patient and willing to work with me and my needs. I would highly recommend DNI for heating services.

J. Jacobs

The service personnel were top-notch – friendly, professional, and dealt with some unexpected issues without missing a beat! Plus, they were dog lovers and made friends with my best buddy Highly recommended!

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Save today with our special offers

At D.N.I. Heating, A.C. and Refrigeration, Inc. our goal is to make your residential or commercial property more comfortable, and to help you save money. We are happy to provide you with the following special offers!

Special Offers

$300 Off

New Residential Evolution Furnace -or- A/C Installation


This coupon cannot be combined with any other offers.