D.N.I. Heating-Cooling-Refrigeration-Plumbing 3990 Broadway, Boulder, CO 80314

"We were so pleased with the expertise that Clayton Garza demonstrated when he serviced the 40+ year old boiler in our home last week in February 2024. We had been chasing a dripping noise in the house for weeks that seemed to be emanating from the roof and following down the flue piping to the boiler. We had ruled out a roof leak, and the latest theory was that there was problem with condensation in the boiler flue. We've had a hard time finding a service technician that is knowledgeable about boilers. Clayton did a thorough check of the issues we were having and the history of prior repairs done. Clayton talked to us about boiler systems while he worked. He and the other technician Juan made thorough investigation of the entire system. They ruled out condensation, made an adjustment to the flue piping to improve the ability to properly vent, and fixed the problem! We highly recommend D.N.I and Clayton Garza, hydronic heating system specialist, for the prompt, courteous service and most of all for the the successful outcome of the repairs. We know who to call in the future for our A/C and heating system solutions! Thank You! Margaret & Frank Sinkule!"

"Steele came out to work on my furnace. He got right to work, but also took time to explain, the steps of what he was doing to troubleshoot the problem. Steele was kind, courteous, and respectful. Very professional. I hope I never have issues with my furnace again,but if so I would call and ask for him . Definitely recommend him to others."

"I rarely leave reviews. I do not know, how everyone else had 5 star left reviews. Two technician came on 8/8/2023. They came in my store 1:29PM and They found out what was problem 2:08pm(tooks 39min). They go back to my parking lot 2:10pm and they left 3:03pm. When they check my cooler, They did not know what was the problem first. They called someone to check the problems. The other technician is not technician. He was helper(he did not know anything). Than DNI charge me $772.50. They only found problems. I didn't even fix it. Does this make sense?(39 minutes of work). Avoid this company if you can"

"Jessie Swanson of DNI did a great job replacing toilet and all the worn out shut off valves in my 20 year old home recently purchased. Worked hard, answered all my naive questions too! Thank u DNI for your responsiveness and professionalism!"

"I've been using DNI for years now to do annual equipment inspections. The Techs are experienced, professional, on- time, and communicate well, hence my 5-star rating. However, like most places, the cost of their 30-minute inspection just continues to climb. A few years ago, is was around $300/year for both inspections. My next check up will cost $230, so $460/year for both A/C and furnace. Aside from piece of mind, on an older, out-of-warranty HVAC system like mine, their inspection gives you a 10% discount on any needed repairs. So, I won't break even unless I have a repair that costs over $4600, which is something MAJOR (or more the longer it is and more services are done before a repair is needed). They have unfortunately priced themselves out of my market, so I will continue cleaning my own furnace, replacing my own filters, cleaning my own A/C compressor fins, and servicing my own steam humidifier, and forgo the biannual service checks."