DALCO Heating & Air Conditioning

HVAC contractor in Denver, CO.

In DALCO Heating & Air Conditioning's own words

DALCO Heating & Air Conditioning services the Colorado Front Range, specializing in designing, engineering, and installing complete comfort systems for owners of existing homes and buildings just like yours. DALCO Heating & Air Conditioning employs a team of highly-skilled and trained technicians who bring a good attitude and integrity to every job site they visit. As a whole company, we are dedicated to delivering the best, and we back this with our 100% satisfaction guarantee.

Trade

HVAC contractor

Business address

4610 S Ulster St Suite #150, Denver, CO 80237

Telephone

(303) 979-7541

Website

dalcohvac.com

Hours

Monday7:00 am - 8:00 pm
Tuesday7:00 am - 8:00 pm
Wednesday7:00 am - 8:00 pm
Thursday7:00 am - 8:00 pm
Friday7:00 am - 8:00 pm
Saturday7:00 am - 8:00 pm
Sunday7:00 am - 8:00 pm

From the business's Google listing, checked Oct 2026

Register

CO register

Recorded as supplied and as found in public sources. This register makes no credential or quality claim about any business; check license status with the state board.

Google Reviews

4.6 (219)

Knowledgeable, friendly and excellent service.

Amy J.
Excellent diagnosis and smart fix.

Tom K.
Mike and Marc are incredible. Super reliable, I trust them completely. Fair price for great work!! I highly recommend them!!!

Cristy G.
Difficult job but he stayed with it and got us going.

James B.
DALCO is my first call when I need HVAC repairs or maintenance. I always recommend them to friends as well. Mike was my technician today and he was so thorough and helpful!

Jana P.
Mike (technician) was prompt and polite, and he gave us some useful tips. We are very pleased with the service.

Clare L.
PLEASE READ- I had Mike come out to assess my A/C issue. He was not aware that I had 2 other well known HVAC companies come out for same assessment. THIS WAS THE ONLY COMPANY that showed me exactly what the issue was and educated me on why my A/C was frozen. The other 2 companies tried to sell me a new A/C unit. Mike was not only technically stellar but honest- something that appears to be in short supply. My system is running perfectly now. I highly recommend using DALCO - you will be happy you did. Karen Linden

karen L.
Knowledgeable regarding heating, cooling, air purifying options. Well-trained technicians for installation, repair and maintenance. This month we had cooling maintenance and air purifier installation.

Bry R.
First time I used Dalco. Great experience. Mike was my technician. He was personable, explained what services he was going to perform and options I had if I decided to move forward with a new system. Fortunately, all was ok with present system just needed service. I will use Delco again.

Rand Z.
Mike is a very knowledgeable technician who is willing to fine tune a complex HVAC, heat pump, maintenance service until it is operating at its optimum.

Jerry V.
Mike was a very professional and skilled at his work. He was very thorough and cleaned up well when he was done. I would recommend him to anyone need g HVAC service.

Jerry V.
Mike was very professional, communicative, and knowledegable.

Paul J.
Marc finished another job and was able to come to my home early. He quickly addressed the issue, fixed it and advised us how to avoid future problems. He was extremely nice and professional. We will be using DALCO for regular maintenance moving forward. Thank you!

Ash G.
Great service. He was very knowledgeable, helpful and our problems were solved. Great asset to your company.

Derick A.
Mike was personable and professional. H realized that he didn't have the right item to properly perform the service and was able to quickly return the next day to successfully do the job. I appreciate his doing it the right way!

Doug D.
I trust DALCO 100% - will use them solely always. Excellent, knowledgeable service with integrity…every time!

Lauren A.
DALCO personnel for scheduling were great. Mike, the technician was on time and did a fantastic job. He was very helpful and professional.

Ja5ma
Great service by Dalco, as always. Mike did a thorough job, and made sure everything was working as it should. Very impressive work by Dalco and Mike!

James D.
As always, great service and attention to detail by Dalco. Salute to Mike, you did a great and thorough job!

Jim D.
The technician did a great job on my furnace and AC tuneup. Professional and knowledge. I highly recommend DALCO.

James N.
Problem was adressed on time , and satisfactly.

Neil M.
We had a great experience with DALCO HVAC company. The owner and the scheduling manager truly came through for us when an issue came up, and we are very grateful for their effort and support. The technician did a very thorough job and was extremely professional and knowledgeable, making sure everything was done properly. Overall, the quality of work and professionalism really stood out. We highly recommend them and truly appreciate all they did for us.

Christine K.
Very professional and prompt. A very experienced tech was able to identify a hard to solve problem and repair it the same day. I would definitely use Dalco again.

Ken C.
Awesome company with amazing service! They resolved my issue quickly and reasonably! THANK YOU DALCO!

Chris R.
Good people, good work, decent value -Thanks

Jim R.
Maintenance provided by Jorge to our furnace and water heater was professional and fast. He even arrived early!

Aimee L.
Serviceman was prompt to the appointment and in short order was able to isolate the problem and provide maintenance to get the system up and running again.

Kevin L.
The Dalco technician was polite, very knowledgeable and helpful. He completed checked out my HVAC system and then went above and beyond by programming my smart thermostat. Outstanding service

Joseph F.

About DALCO Heating & Air Conditioning

HVAC services in Denver

DALCO Heating & Air Conditioning specializes in the design, engineering, and installation of comfort systems for residential, commercial, and light commercial buildings. The company says it provides repair, maintenance, and installation services for a wide variety of heating and cooling units. Its technicians are trained to work on brands such as Trane, American Standard, Carrier, Bryant, Lennox, Rheem, Ruud, and Goodman, among others. It also lists services for air purification and indoor air quality.

Per the American Community Survey, utility gas accounts for 61% of the heating fuel used in Denver. The company says it offers 24/7 emergency repair services to its clients. The business has maintained operations since 1981 and describes its team as NATE-certified. It also names a 100% satisfaction guarantee as part of its service model.

Reliability and ratings

Reviewers frequently mention the technical knowledge and honesty of the technicians. Some customers note that the company provides thorough diagnoses and helpful education regarding system issues. The business maintains a 4.6 rating from 219 reviews. The company operates daily from 7:00 am to 8:00 pm.

Denver climate and systems

According to NOAA normals, the mean temperature in Denver is 51.6 degrees F. These temperature patterns relate to the diverse range of heating and cooling equipment the company services, including heat pumps and various furnace models. The company is a member of the Trane Comfort Specialist Program.

nate-certified technicians.

Services, brands and warranty details come from the company's own website. Ratings, hours and reviews come from Google. Town figures come from the US Census and NOAA.

More HVAC contractors in Denver

About Denver

Population	740,613 (2025)
County	Denver County
Average yearly snowfall	41.3 inches
Heating degree days	5,678
Most common heating fuel	Utility gas

Sources: U.S. Census Bureau. NOAA U.S. Climate Normals 1991-2020.