Rated 4.8 on Google

Heating & Cooling Services in Boulder, CO

Loveland Choice Award 2026 Winner
Best AC/Heating Service
Best Tankless Water Heater Dealer
2 Year Labor Warranty
Covers workmanship on qualifying services
Waived Diagnostic Fee
When you move forward with repair
Home » Boulder

Boulder’s housing presents an interesting mix for heating and cooling. Older homes and rentals weren’t always built around the cooling demands homeowners experience today, while renovations and newer construction have to account for the city’s current approach to building efficiency. That can mean very different HVAC needs from one Boulder property to the next.

Northern Air provides heating and cooling service for Boulder homes and businesses. Our work covers air conditioning, furnaces, boilers, emergency repairs, and commercial HVAC for existing buildings and new projects.

If your system is having trouble keeping your Boulder property comfortable, we can help determine what it needs. Schedule service and get your heating or cooling appointment on the calendar.

Schedule service today in minutes!

Air Conditioning Services

Air conditioning has become a bigger consideration for Boulder properties that weren’t originally designed around central cooling. The City of Boulder specifically notes that older buildings generally weren’t constructed with AC because high-heat days were less common in the past.

Northern Air provides air conditioning services for Boulder homeowners dealing with aging equipment, inadequate cooling, and homes that need a new approach to summer comfort.

  • AC Installation: Adding or replacing cooling in an older Boulder property isn’t always as straightforward as swapping equipment. Air conditioning installation can help homeowners choose a system suited to the home’s current layout and cooling needs.

  • AC Repair: A Boulder AC may perform normally during milder foothills weather and then struggle once several hot afternoons arrive in a row. Air conditioning repair can address long run times, weak cooling, and systems that no longer maintain the thermostat setting.

  • Ductless Mini Splits: Older Boulder homes, additions, studios, and converted spaces may not have ductwork where cooling is needed. Ductless mini splits give homeowners another option for conditioning those areas without trying to extend a conventional duct system through the entire property.

Get your cooling system ready before hotter Boulder afternoons expose an existing comfort problem.

Heating Services

Boulder sits directly against the foothills, and winter conditions can put furnaces and boilers into steady use. Heating needs can also differ substantially between an older Boulder house and a recently renovated or newer property.

Northern Air provides heating services for Boulder homes with forced-air and hydronic heating systems.

  • Furnace Repair: A furnace problem becomes much easier to notice when colder foothills weather has the system running throughout the day and night. Furnace repair can address weak heat, short cycling, unusual operation, and rooms that aren’t warming as expected.

  • Boiler Maintenance: Some of Boulder’s older properties rely on hydronic heating, making seasonal boiler condition particularly important before sustained winter use. Boiler maintenance gives the system attention before colder weather puts it through longer heating cycles.

  • Emergency Heating Repair: A heating failure during a Boulder cold spell isn’t something every household can comfortably put off. Emergency heating repair is available when a furnace or boiler problem requires more immediate attention.

Northern Air also has a 24/7 answering service, giving Boulder customers a way to reach us when an HVAC problem occurs outside regular hours.

Schedule heating service when your Boulder home starts showing signs that its furnace or boiler isn’t keeping up.

Commercial HVAC Services

Boulder’s commercial properties range from older buildings and renovated spaces to offices, restaurants, research facilities, retail properties, and newer construction. HVAC work often has to account for the building itself as well as how the space is used each day.

Northern Air provides commercial HVAC services for Boulder businesses, builders, contractors, and property owners.

  • New Construction HVAC: Boulder requires heating and cooling equipment sizing documentation for new residential construction, and its energy code applies to new commercial buildings as well. Northern Air handles new construction HVAC when mechanical systems need to be coordinated with the larger building project.

  • Commercial HVAC Projects: Renovating or changing the use of an existing Boulder building can create HVAC requirements that go beyond an ordinary repair visit. Northern Air handles commercial HVAC projects for planned work involving larger system changes and building improvements.

  • Emergency HVAC Services: An HVAC failure can quickly interfere with customers, employees, tenants, or normal operations in a busy Boulder commercial property. Commercial emergency HVAC services are available when the heating or cooling problem needs prompt attention.

Talk with Northern Air about HVAC work for your Boulder business, building, or upcoming project.

HVAC Challenges for Boulder Homes

One of Boulder’s more distinctive HVAC issues is the relationship between its older building stock and changing cooling needs. The city reports that rental housing makes up 52% of its housing stock and specifically notes that many older buildings weren’t constructed with air conditioning because extreme heat was historically less common. That can leave some properties looking for cooling options that work with an existing structure rather than a home designed around central AC.

Renovation also brings another consideration. Boulder requires heating and cooling equipment sizing documentation for many projects involving new mechanical systems, and properties 50 years or older can face additional historic-preservation review depending on the work involved. For homeowners updating an older property, HVAC decisions may need to fit both the building and Boulder’s current requirements.

We don’t just talk about quality—we show it

Our team adheres to recommended service procedures that optimize safety, efficiency, and performance. Explore our gallery to see the difference expertise makes.

Why Boulder Homeowners & Businesses Choose Northern Air

Choosing an HVAC company is about more than finding someone who works on the right equipment. Boulder customers also need experienced technicians, responsive support, and a team equipped to handle different types of properties.

  • Experienced technicians: Northern Air technicians average 14 years of tenure, bringing substantial field experience to repairs, maintenance, installations, and commercial HVAC work.

  • Support when HVAC problems can’t wait: Northern Air provides residential and commercial emergency HVAC service, backed by a 24/7 answering service when problems occur outside regular business hours.

  • Residential and commercial experience: Our team works with homeowners, businesses, property owners, builders, and contractors throughout the Boulder area.

  • Solutions for different types of properties: Northern Air works with central AC, furnaces, boilers, heat pumps, ductless systems, ductwork, indoor air quality equipment, thermostats, and hot water heaters.

Need HVAC Help at Your Boulder Property?

Older Boulder homes, renovated properties, newer buildings, and commercial spaces can all place different demands on their heating and cooling equipment. If your system isn’t keeping up or you’re planning an HVAC change, schedule service with Northern Air and get help based on what your Boulder property actually needs.

New Qualifying HVAC Systems

for as low as $177/Month
Subject to change without notice. With approved credit. Offer cannot be combined with any other promotions, discounts, or special offers. Terms and conditions may apply.
Expires: Oct 31, 2026

Contact Us

Name(Required)

Frequently Asked Questions

Our reviews

What Homeowners Are Saying About Us

Review Highlights
Customers consistently praise the team's professionalism, friendliness, and expertise in maintaining and repairing HVAC systems, with many highlighting how knowledgeable and thorough technicians like Matt, Anthony, and others are in diagnosing problems and explaining the work being done. Long-term customers especially appreciate the reliability and trustworthiness of the service, noting prompt response times, meticulous attention to detail—including cleaning up after themselves—and willingness to go above and beyond by offering maintenance tips and addressing issues beyond the immediate repair. The combination of quality workmanship, honest pricing, excellent communication, and the genuine care shown to customers has earned strong loyalty, with many families recommending the services to friends and choosing to stay with the company for years.

Based on 449+ Reviews

JJ and Scott were professional, personable and efficient. The system works great and the house was cleaner when they left than when they arrived. I can't say enough about Northern Air.
Dave Hawkins
1 day ago
Ronny was friendly and quick! I appreciate his work and time. Thank you Ronny.
Courtney Carter
1 day ago
Northern air is the best HVAC company around! It's hard to find an honest and reliable company. They have always been so responsive along with transparent and honest about their prices. I am so happy to have such a great company taking care of my HVAC system.
Kirstin Simons
2 days ago
Matt W has been servicing our equipment for several years. He is very friendly and knowledgeable. He always asks about our lives, health, etc. a great guy.. We always ask for him.
Joe Smith
3 days ago
Benjamin did ALL inspections and cleaning; he is skilled, experienced, answered all questions.
R Reid
3 days ago
Professional, friendly and knowledgeable technician.
mike pendergast
4 days ago
Anthony went above and beyond in routine maintenance, identifying related issues with our fireplace glass which had melted insulation. He put up a sign to not use the fireplace, which was a big help. Thank you!
Patricia Stutz-Tanenbaum
5 days ago
Matt from northern colorado air is one of the best AC techs I have ever met, he knows the systems like the back of his hand..very professional and a nice guy!!!
Michael Loukonen
5 days ago
    Ready to Get Started?

    Keep your home comfortable year-round with Northern Air

    From routine maintenance to unexpected repairs and complete system replacements, Northern Air is here to keep your home comfortable through every season. Count on our experienced local team for dependable HVAC service in Fort Collins.