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Boulder’s Trusted Ductless HVAC Contractors

Complaints with your ductless mini- or multi-split system in Boulder, Colorado? No matter the make or model, scope of problem, from residential to commercial application, Welzig Heating and Air delivers successful solutions. Let us earn your satisfaction through accommodating scheduling, punctual arrival and honest recommendations. Appreciate the convenience of quick turnaround and repairs that meet long-term expectations.

As a Bryant Factory Authorized Dealer, our team is extensively and consistently trained. You can be sure our NATE-certified technicians understand the ins and outs of ductless technology and are experienced in everything from new system installation to tune-ups and repairs. Utilizing advanced diagnostic software, we confirm our findings and outcomes. We get your ductless system operating at its best again.

Contact Welzig Heating and Air for Ductless HVAC Repair

Family owned and operated, Welzig Heating and Air has made a name for ourselves over 30 years of dedicated HVAC services. Give us a call at (720) 336-3777 anytime. Don’t wait and risk more extensive damage. Any issues with performance quickly lead to energy waste, higher utility bills, inferior comfort and greater chance of replacement rather than a cost-effective fix. We’re here whenever you need us, including 24/7 emergency response.

Satisfied Customers
They Speak For Us

Bob came out to look at our swamp cooler and was remarkably helpful and professional. Not only did he give me a knowledgeable diagnosis, but he also taught me a lot in the process. We’ll be calling him for all future needs with our cooling system.


Dave Kaplan-Gomez and James Miltersen installed my new Tankless Water Heater. Both were polite and professional. Care was taken not to damage anything in my house which I really appreciated. I use Welzig for all my HVAC needs and highly recommend them.


Our 23-year-old A/C system ran out of “borrowed time” and became too difficult to continue maintaining. With great advice from Casey Welzig,, we replaced the old system with a Bryant Evolution A/C system. Max Loustaunau and Seth Bernhardt did an excellent job with removing the old system and installing the new one. Both of them are great to work with — very professional and very personable. We are really amazed at how much better the new system works!

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