Boulder’s Finest Furnace Replacement Experts

[Name] is the company to contact if you need a furnace replacement in Boulder, CO. We are a Bryant Factory Authorized Dealer. We install only the brands we trust. Whether you’re looking for a heating system for a new home construction or are looking to upgrade your old single-stage furnace, we can help.

You don’t usually think about your furnace on a day-to-day basis. It’s easy to forget about your furnace until it fails on a cold winter night. How do you know when to replace your furnace? If your furnace is over 15 years old, you should consider replacing it. Furnaces become less efficient as they age, requiring more and more repair work. Heating costs may have suddenly increased due to the age of your furnace. As your furnace ages, it will require more energy to provide the same amount of heat. Consequently, your heating bill will rise. Your furnace shouldn’t need frequent repairs. Your furnace should be replaced if you are having to repair it twice or three times a year. You are saving money by replacing your furnace instead of continuing to repair it.

Contact Welzig Heating and Air for New Furnace Installation Today!

As a family-owned and operated business since 1994, Welzig Heating and Air can replace your old furnace so you stay comfortable in the cold. Choosing a well-designed heating system will increase comfort and lower energy bills right away. Our furnace replacement professionals take the time to learn the unique needs of your house and design a heating system for you that is correctly sized and properly installed. For your next furnace replacement, call the HVAC professionals at Welzig Heating and Air. As a BBB accredited business and a Google Guaranteed Service provider, you can be sure you are hiring the best in Boulder.

Satisfied Customers
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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!


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.

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