Denver’s Premier Heating and Cooling Experts Since 1976

Residential and Commercial Heating, Air Conditioning, Indoor Air Quality, and More

Denver’s Premier Heating and Cooling Experts Since 1976

Residential and Commercial Heating, Air Conditioning, Indoor Air Quality, and More

Heating

With Controlling Systems, your heating
needs will be taken care of. You can be sure
that we will provide detail-oriented, honest work
and that your home will be cozy and comfortable.

Cooling

Controlling Systems Heating & Air Conditioning
is your #1 HVAC contractor in the Denver, CO,
community. We are the leading company for all
of your air conditioning needs. Find out how we can
help you beat the Colorado heat today!

Indoor Air Quality

Keeping your home safe and comfortable
is a priority for Controlling Systems Heating
& Air Conditioning. Our staff is always happy to
discuss anything about your home's indoor air quality.

Truck-RUUD

About Us

Founded in 1976, we have decades of experience helping our customers to reduce their energy usage while increasing their comfort.

At Controlling Systems Heating & Air Conditioning, we pride ourselves on being Denver's #1 premier HVAC contractor, as well as being a Ruud Pro Partner. This means we have extensive knowledge in installing, repairing, and maintaining Ruud heating and cooling equipment.

Furthermore, we have expertise in the installation, preventative maintenance, and servicing of all heating, air conditioning, and indoor air quality products from all major HVAC brands.

I would highly recommend this company.

Two installers were sent the day of installation. They were both courteous and professional! They arrived on time and immediately dismantled the old system and prepared the space for the new system! They were very efficient and worked well together as a team. Following the completion of their work, they ran the furnace and explained the functions of the thermostat in great detail! I want to thank both Gemini and Roman for their attention to detail, answering our endless questions, and removing all remnants of their work! I would highly recommend this company and these two employees!
EJ R.

Boiler Replacement in Denver, CO 80206

“An HVAC company that does what they promise, in reasonable time, for market-reasonable cost? With pleasant humans throughout the process?? Unheard of. Until I hired Controlling Systems to replace my 14-year buggy radiant home heating and on-demand hot water system. Seven of the contractors who looked at my mess earned a spot on the spreadsheet comparing contenders. Some said stupid salesy-desperate things like, “ours is the only high-efficiency unit on the market,” and, “only ours is the top model.” Ich. Bailey’s deep knowledge and clear, straightforward communication earned my trust, and then he followed through! Over the years I’ve paid a LOT of HVAC guys to not fix the prior system, or clearly recommend actual replacement options, featuring the outcomes I could expect, especially concerning heating the cold spots in the house. What a breath of fresh (warm!) air: with Gus’ smiling assistance, Bailey expertly installed a new unit, which runs economically, quietly, and I can trust, reliably for many years to come. 10 stars!”

- Jen S.

Recommend Controlling Systems

The two men that came out to install my AC/Furnace did an excellent job. They were on time, they were courteous, and always kept me in the loop as to what they were doing. Before leaving my home, they tested everything and made sure to walk me through how everything worked. I would highly recommend Controlling Systems to anyone in need of HVAC. Thank you!

Cyndi M

Gas Furnace Repair in Denver, CO 80227

“Best service call I’ve ever received!! Showed up super fast, within an hour of me calling. Bailey was excellent, super professional, super polite and very knowledgeable and actually showed me how my furnace worked! Super helpful! He came in and actually fix the furnace quickly ! Very happy with your company and with Bailey and I guarantee I’ll be calling again with any other problems in the future. Highly recommend your company! Thank you so much!”

- Aspen S.

WHAT ARE
THEY SAYING
ABOUT US?

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Air Conditioner Replacement in Aurora, CO 80012

“Roman and John replaced a central a/c unit and water heater. Great experience from initial evaluation to estimate to install process. I rehired Controlling Systems after they did an extensive furnace/ductwork replacement project and installed a new central a/c system in my previous home. Their teams are courteous, efficient and very skilled. Five star service”

- Julia R.

Air Conditioner Installation in Denver, CO 80232

“So far, I am quite pleased. They were quite personable and answered questions. Also quite pleased that they cleaned up after themselves.”

- Shizuko H.

Air Conditioner Replacement in Commerce City, CO 80022

“When I called they got me an appt very soon and were extremely nice. Our technician was Aireus and he was fantastic. He explained things to me and was able to fix the problem same day! Highly recommended Controlling Systems!”

- Serena H.

Other Replacement in Thornton, CO 80020

“Very efficient and polite. Roman and his team were awesome.”

- Shelly M.

Professional, on time, great communication.

Great Job! I have a hot water/boiler heat system that gave us a mind bending problem! Not always easy to fix residential repair people that know what they are doing. Shout out to Gus and Arius for all that they did to problem solve and fix the issue. Professional, on time, great communication. I would recommend! I know I will call them in he future!

Jill L.

Showed up on time

From the moment I called to set up my appointment to the in-person visit to winterize my swamp cooler, I received outstanding service. The technicians showed up on time, were totally respectful of our home, answered all my questions, and were very friendly. I thought the service was priced very fairly and that I got a great value.

Kari K.

HVAC maintenance

“Technician was early with a badge on his shirt identifying him as a technician with Controlling Systems. Polite, efficient, pleasant and knowledgeable! Advised on future HVAC maintenance. I highly recommend Controlling Systems and have used them for many years and will continue to do so!!

Kathy N.

what are they saying about us?

Boiler Replacement in Denver, CO 80206

“An HVAC company that does what they promise, in reasonable time, for market-reasonable cost? With pleasant humans throughout the process?? Unheard of. Until I hired Controlling Systems to replace my 14-year buggy radiant home heating and on-demand hot water system. Seven of the contractors who looked at my mess earned a spot on the spreadsheet comparing contenders. Some said stupid salesy-desperate things like, “ours is the only high-efficiency unit on the market,” and, “only ours is the top model.” Ich. Bailey’s deep knowledge and clear, straightforward communication earned my trust, and then he followed through! Over the years I’ve paid a LOT of HVAC guys to not fix the prior system, or clearly recommend actual replacement options, featuring the outcomes I could expect, especially concerning heating the cold spots in the house. What a breath of fresh (warm!) air: with Gus’ smiling assistance, Bailey expertly installed a new unit, which runs economically, quietly, and I can trust, reliably for many years to come. 10 stars!”

- Jen S.

Gas Furnace Repair in Denver, CO 80227

“Best service call I’ve ever received!! Showed up super fast, within an hour of me calling. Bailey was excellent, super professional, super polite and very knowledgeable and actually showed me how my furnace worked! Super helpful! He came in and actually fix the furnace quickly ! Very happy with your company and with Bailey and I guarantee I’ll be calling again with any other problems in the future. Highly recommend your company! Thank you so much!”

- Aspen S.

Air Conditioner Replacement in Aurora, CO 80012

“Roman and John replaced a central a/c unit and water heater. Great experience from initial evaluation to estimate to install process. I rehired Controlling Systems after they did an extensive furnace/ductwork replacement project and installed a new central a/c system in my previous home. Their teams are courteous, efficient and very skilled. Five star service”

- Julia R.

Proudly Serving Denver and Surrounding Cities

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Read Our Latest Articles

Homeowners taking advantage of ductless mini splits in Arvada, CO. Controlling Systems blog image.

Can Ductless Mini Splits Provide Healthier Living?

May 30, 2023

Your home is a place for rest and relaxation. Heating and cooling is a big part of that equation—but so is indoor air quality (IAQ).  It’s why you should consider ductless mini splits.

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Caution sign that allergy season is right around the corner. Controlling Systems indoor air quality blog image.

Does Indoor Air Quality Help Your Allergies?

May 15, 2023

Did you know the average American spends nearly 90 percent of life indoors? That’s why it is increasingly important to ensure indoor air quality (IAQ) is clean and healthy.

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Dad in front of fan with daughter waiting on tech to fix their air conditioning unit. Controlling Systems blog image.

6 Common Air Conditioning Problems

April 28, 2023

When the weather gets really hot in Littleton, the last thing you want is a broken air conditioner. Many common problems with air conditioning systems can arise.

Read More