Make D.N.I. Heating, A.C. and Refrigeration, Inc. your go-to for plumbing services in Longmont, CO and surrounding areas and always enjoy maximum return from your investment. We focus on satisfaction and sustainability, offering residential and light commercial solutions to every manner of challenge. Rely on us for conventional water heater and tankless conversions, new installation, replacement, repair, and maintenance. Give us a call at 303-772-2490 for leak detection and repairs and any issues with sewer and drain lines. Let us handle your plumbing fixtures and take advantage of unmatched quality and durability.

Expert Plumbing System Services & Installations

Locally owned and operated since 1997, D.N.I. Heating, A.C. and Refrigeration, Inc. has built a reputation for honesty and dependability across Mead, Longmont, Firestone, Frederick, Loveland, Berthoud, Johnstown, Erie, Lafayette & Louisville, CO. Our fully licensed and insured professionals are prepared for the toughest challenges. From extensive resources and experience to regularly updated training, we ensure a smooth process, quick turnaround, and an outcome you can trust. From trimming costs through superior efficiency to adding convenience and improving aesthetics, we’ve got all of your plumbing needs covered. D.N.I. Heating, A.C. and Refrigeration, Inc. remains on call 24/7 for Emergency services.

What our clients are saying

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!

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!

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.

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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.

Plumbing Service, Plumbing Installation & Plumber Service Firestone, CO, Erie, CO, Longmont, CO, Mead, CO, Louisville, CO & Lafayette, CO

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