Welzig always offers FREE estimates on your equipment replacement

Specializing in effective and affordable solutions to even the toughest temperature control challenges in Boulder, CO and surrounding areas, Welzig Heating and Air offers a complete range of Ductless HVAC services, including new installation, seasonal upkeep, and prompt repair.  Now matter how big or small the space, for a single or multiple rooms, residential or commercial application, ductless air conditioners and heat pumps provide energy efficient temperature control without major renovation or expense.  Most often, the NATE-certified technicians from Welzig Heating and Air complete your project in a single day.

Dependable Ductless Heating & Cooling Installations & Service

As a Bryant Factory Authorized Dealer, our team is factory trained, regularly updated, and qualified in advanced ductless technology, ensuring the ideal system for your exact requirements.  Compact, streamlined, quiet, and user-friendly, ductless systems are a cost-effective means of achieving perfect year round comfort.  Contact the experts from Welzig Heating and Air at (720) 336-3777 for further information, convenient financing with approved credit, and quality service, including 24/7 Emergency Repair across Boulder, Longmont, Louisville, and Lafayette, CO. Family owned since 1994, we handle every job to higher standards of excellence.

Ductless HVAC Service, Ductless Split Repair, Ductless Split Installation, Ductless HVAC Repair & Ductless HVAC System Installation Boulder, CO, Longmont, CO, Louisville, CO & Lafayette, CO

Ductless Air Conditioning Repair Boulder, CO | Ductless Split Repair Longmont, CO | Ductless Heating Repair Louisville, CO

Ductless AC RepairDuctless Heating RepairDuctless Air Conditioning Repair ∴ Boulder, CO ∴ Lafayette, CO ∴ Longmont, CO

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.


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!


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.

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