Longmont, CO Professional Ductless HVAC Services

Are there rooms of the house that feel overheated in summer or chilly in winter? Are you renovating, adding on or making improvements to your home or commercial facility? Has a lack of ductwork compromised comfort? If you’re interested in a space-spacing innovation that installs without any tear down or mess, Welzig Heating and Air is happy to share the versatility of ductless mini-splits. Compact equipment, sleek design and nearly endless configurations ensure a perfect fit for any challenge.

As a family owned and operated HVAC business out of Longmont, Colorado, Welzig Heating and Air gets excited about heating/cooling innovations. We’ve devoted 30 years to providing energy efficient and cost-effective solutions to residential and commercial comfort. A ductless system consists of an outdoor compressor and one or multiple indoor air handlers linked by way of a conduit. A small hole in an exterior wall and access to electricity are about the only requirements, and installation is typically handled in an afternoon.

Your Qualified Ductless HVAC Service Team

As a Bryant Factory Authorized Dealer, Welzig Heating and Air offers truly exciting ENERGY STAR qualified ductless options, featuring amenities such as inverter technology, up to 42.5 SEER and powerful enough heating to handle outdoor temps down to -22° F. Enjoy perks such as built-in WiFi accessibility, smart sensors that detect room temperature and humidity levels, slim profile air handlers and occupancy sensors for personalized targeting of airflow.

Our NATE-certified technicians handle all ductless mini-split services, including new installation, retrofits, replacements, seasonal maintenance and repairs, regardless of brand. We remain on-call for 24/7 emergency response. Simply get in touch at (720) 336-3777 for further information, prompt scheduling and an outcome that totally satisfies.

Ductless HVAC Service, Ductless HVAC Repair & Ductless HVAC Boulder, CO, Longmont, CO & Louisville, CO

Ductless HVAC Service, Ductless HVAC Repair & Ductless HVAC

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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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Longmont, CO