Family-owned in Denver since 1976

A legacy of excellence
in HVAC services.

For nearly five decades, Controlling Systems Heating, AC and Electrical Repair has been a trusted name in heating, cooling, and indoor air quality across the Denver metro. As an independent, locally owned business, we treat every customer like a neighbor, because most of them are.

Schedule Online (720) 379-2985

Years in Denver

4.9★

592 Google reviews

24/7

Live answering

Our Story

Keeping Denver comfortable since 1976.

Five decades is a long time to be doing one thing well. It means we have seen Denver homes go from steam radiators to high-efficiency heat pumps, from window units to whole-home solar. Through every shift, the way we work has stayed the same: show up on time, diagnose honestly, and stand behind the work.

Since 1976, Controlling Systems Heating, AC and Electrical Repair has been a trusted name in heating, cooling, and indoor air quality solutions. For nearly five decades, we have built a reputation for exceptional service, technical expertise, and a deep commitment to customer satisfaction. As an independent, locally owned business, we take pride in serving the Denver community, ensuring that our customers receive top-tier HVAC solutions tailored to their specific needs.

We understand that heating and cooling are more than just mechanical systems. They are essential to the comfort, health, and safety of your home or business. That is why we go beyond simply installing or repairing equipment. We work closely with our customers to provide energy-efficient, long-term solutions that improve their quality of life.

When you call us, you are not just another customer. You are a neighbor, and we treat you like one. That mindset shapes everything: the honest recommendation over the upsell, the call-back when we said we would, the technician who explains what the part does and why it failed.

1976

Doors open in Denver

25+

Metro cities served

100%

Satisfaction guarantee

Quality & Expertise

Certified, factory-trained, and held to the highest standard.

At Controlling Systems, quality is at the core of everything we do. From our highly trained technicians to our carefully selected product offerings, we maintain the highest standards in the industry.

We service and install all major HVAC brands, offering a full range of heating, air conditioning, and indoor air quality products. Whether it is a furnace installation, an air conditioning repair, or an energy-efficient upgrade, our team delivers solutions that maximize comfort while minimizing energy consumption.

NATE Certified

North American Technician Excellence

ICC Certified

International Code Council

EPA Licensed

Refrigerant handling certification

Factory Trained

All major HVAC brands

Colorado License: LIC235711

What we stand for

Putting customers first, every call, every job.

What sets us apart is our unwavering commitment to customer satisfaction. We do not just provide HVAC services; we build relationships based on trust, reliability, and transparency. Our customers know they can count on us for honest recommendations, fair pricing, and expert workmanship.

A neighbor, not a number

When you call us, you are not just another customer. You are a neighbor, and we treat you like one. That is how we have built five decades of business in Denver.

Always answered, always available

24/7 emergency service with 24/7 live answering. No phone tree. No call-back-in-the-morning when your furnace dies at 2 a.m. A real person picks up.

Honest, transparent pricing

$89 flat-rate diagnostic, waived if we do the work. No service call fees. No dispatch fees. You know the number before we open the truck.

100% satisfaction guarantee

Every install, every repair, every maintenance visit is backed by our guarantee. If it is not right, we make it right.

Built to last, built efficient

More than installing equipment, we focus on energy-efficient solutions that enhance comfort while reducing long-term costs for your home or business.

Access when you need it

HVAC issues do not wait. We offer financing options so the solution is never out of reach, plus special discounts for military personnel and senior citizens.

Investing in our community

Locally owned means showing up for Denver, not just billing it.

Being locally owned means more than just doing business in Denver. It means actively contributing to the well-being of our community. We take great pride in our partnerships with organizations like the Food Bank of the Rockies, where we help support local families in need. We believe that success is not just measured by profit, but by the impact we have on the people around us.

Through community outreach, energy-saving initiatives, and a customer-first approach, we strive to be more than just an HVAC company. We aim to be a trusted partner that enhances the lives of those we serve.

Food Bank of the Rockies partner Military discounts Senior discounts

Where we work

Dispatching from Denver. Serving 25+ metro cities.

We dispatch from the heart of Denver to deliver fast, efficient, and affordable home solutions. As fellow members of the Denver community, we are your go-to experts for prompt and professional service across the front range.

Arvada

Aurora

Berkley

Boulder

Broomfield

Centennial

Central Park

Commerce City

Denver

Englewood

Federal Heights

Golden

Greenwood Village

Highlands Ranch

Lafayette

Lakewood

Littleton

Lone Tree

Louisville

Northglenn

Sherrelwood

Superior

Thornton

Westminster

Wheat Ridge

A legacy of excellence in HVAC services.