Controlling Systems Heating & Air Conditioning — Denver HVAC, Electrical & Solar Since 1976

Denver's furnace, A/C and electrical experts — for nearly 50 years.

Two generations of NATE-certified technicians keeping Denver homes comfortable. Honest diagnostics, transparent pricing, and a 100% satisfaction guarantee on every job — backed by 593 five-star Google reviews.

4.9 · 593 Google reviews

NATE · ICC · EPA certified

A family business that treats you like a neighbor — because that's what you are.

We've been a Denver fixture since 1976. Two generations of NATE-certified, ICC-certified, EPA-licensed technicians who show up, explain the problem in plain language, and quote the work before they start. That's the whole pitch — and the 593 five-star reviews back it up.

"I'm very happy I went with Controlling Systems for my major HVAC system overhaul! I upgraded to an electric heat pump hybrid heating/cooling system and an electric heat pump water heater. Chris was very knowledgable about all my different options, and worked with me to choose the best system for my house and my budget. He also got me all the relevant Excel rebates, saving me about $11,000 total. Elijah and his crew did a great job with the installation."

Sarah

Google review · 5 months ago

"We have a MiniSplit heat pump system that caused us nothing but trouble in the 2 years we have had it. I tried 3 other HVAC companies in an effort to solve the problems, but they could not provide definitive solutions. In desperation, I called Controlling Systems. After a thorough analysis he found several problems including some that were not at all obvious. They were able to correct the botched installation over a 2-day period and now the system works perfectly. I highly recommend Controlling Systems."

John Fast

Google review · 4 months ago

"We recently had a steam humidifier and UV air scrubber installed, and we couldn't be happier with the experience from start to finish. The team is professional, knowledgeable, and respectful of our home. They took the time to explain how both systems work, answered all of our questions and made sure everything was installed cleanly and efficiently. The installation was seamless and they left the work area spotless. Highly recommend this company. Five stars all the way."

Leisa Hesebeck

Google review · 3 months ago

A Denver family business, keeping homes comfortable since 1976.

For nearly five decades, Controlling Systems has been an independent, locally owned name in heating, cooling, and indoor air quality. We service and install all major HVAC brands, and we work closely with every customer to deliver energy-efficient, long-term solutions — not just a quick fix.

We build relationships based on trust, reliability, and transparency. When you call us, you're not just another customer. You're a neighbor — and we treat you like one.

Family-run

NATE certified

Food Bank of the Rockies partner

Military & senior discounts

More about Controlling Systems

Book a visit or talk to a real Denver dispatcher right now.

Schedule online and we'll confirm a window the same day. Or pick up the phone — someone is at the dispatch desk every hour of every day, including weekends and holidays.

Denver's furnace, A/C and electrical experts — for nearly 50 years.

One licensed crew for everything in your home that heats, cools, or runs on power.

Furnaces, boilers & heat pumps

Central A/C & mini-splits

Humidifiers, purifiers & ducts

Repairs, upgrades & installs

Solar installations

No heat? No cool? No power?

A family business that treats you like a neighbor — because that's what you are.

NATE Certified Technicians

$0 Service-Call Fees

Locally Owned in Denver

Financing Available

593 reviews. 4.9 stars. Here's what a few of them said.

A Denver family business, keeping homes comfortable since 1976.

Proudly serving Denver and 24 surrounding cities.

Book a visit or talk to a real Denver dispatcher right now.