Preventative Maintenance

When it comes to appliances, it’s best to make sure they receive preventative maintenance according to the manufacturer’s schedule. Not only will this ensure your equipment runs as safely and efficiently as possible, preventative maintenance can also help ward off costly repairs. We specialize in the maintenance and service of furnaces, boilers, HVAC systems, and appliances in Longmont, Boulder, Fort Collins, and Northern Colorado.

You can think of your furnace, HVAC, central air conditioning unit, or your commercial refrigeration unit in the same way you think of a new car.

When you drive the car off the lot it will be in tip-top shape, but the instruction manual is pretty specific about preventative maintenance. You’ll need to get the oil changed at certain intervals. You’ll need to change the air filter when it gets dirty, maintain the appropriate air pressure in your tires and have your fluids flushed according to the vehicle maker’s guidelines.

If you’re attentive to what needs to be done, your new car will last you for years to come.

On the other hand, if you let everything go and instead choose to take more of a “let’s cross our fingers and hope for the best” approach, your shiny new vehicle will wind up in the shop much sooner than later, and ultimately, the engine is going to quit on you far sooner than it would have, had you given the car the appropriate TLC.


At D.N.I. Heating, A.C. and Refrigeration, Inc., we have almost two decades of providing preventative maintenance services for all types of systems in Longmont, including furnaces, boilers, HVAC units, central AC units, appliances, and commercial refrigeration equipment.

And since we only hire the best and most highly trained technicians, we’re able to service all makes and models of heating, cooling, and refrigeration systems, large and small.

We believe that cautious maintenance services are likely to help you avoid the need for emergency repair services. Our services save our clients quite a bit of money, because they help extend the lifespan of the equipment they have.

If you’re looking for a preventative maintenance package that meets your need, look no further. D.N.I. Heating, A.C. and Refrigeration, Inc. can help you with full maintenance services in the Longmont and Boulder areas on HVAC systems, boilers, furnaces, and a variety of appliances or, if you prefer, we can assist your maintenance staff.

  • Boilers
  • Chillers
  • Building automation controls
  • Commercial refrigeration equipment
  • Other types of commercial heating and cooling equipment
  • Electric heat
  • Heat pumps
  • Geothermal heat pumps
  • In floor heating systems
  • Hot water solar
  • Industrial
  • Maintenance contracts
  • Pneumatic control
  • Industrial heating, cooling, and refrigeration equipment
  • Residential heating and cooling
  • Water heaters

Other services are also available-for more information on the types of maintenance we can help you with or to schedule a time for an onsite evaluation, call us today to learn more.


D.N.I. Heating, A.C. and Refrigeration, Inc. has been helping residential and commercial clients in Northern Colorado for nearly two decades. Our attention to detail and commitment to customer service are just two of the reasons we’re one of the top-rated HVAC, furnace, boiler, central AC, and commercial appliance preventative maintenance service providers in the Longmont and Boulder areas.

Call us to learn more.


What our clients are saying

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.

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!

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.

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!

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!

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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.