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At Welzig Heating and Air, we take pride in having served residences and businesses in Longmont, CO with top-quality AC installation services since 1994! Our team of NATE-certified technicians are trained to handle the unique challenges with every AC installation project. From assessing your property to determine the right size and design of your AC system to installing your AC equipment with precision and care, we’ll make sure the job is always done right the first time around.

We understand that every property has its own unique comfort requirements, which is why we offer many styles of cooling systems to meet your particular needs. Our experts will work closely with you to determine your preferences, comfort requirements, and budget. As a Bryant Factory Authorized Dealer, we’ll help you find the best style of system that has incredible energy efficient performance and is built to last for the long term. When your new system is installed, we’ll test it carefully to ensure efficient and effective operation.

Since your new cooling system is a major investment, it’s important to keep it protected. We recommend joining our Comfort Club which will grant you priority servicing, 21-point inspections, and discounted labor and parts. Enrolling will give you peace of mind with a system that has minimal risk of experiencing any problems. When you want the very best air conditioning installation service in Longmont, make sure to contact us at 720-336-3777!

Satisfied Customers
They Speak For Us

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.


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!

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