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Enjoy Healthy Air Quality in Boulder, CO

Indoor air contaminants may negatively impact your heating and cooling system as well as your health. You may contact Welzig Heating and Air if you are concerned about indoor air pollutants in your home. Our company provides indoor air quality products and duct cleaning services to help reduce contaminants in the air. We provide cleaning and repair services for duct systems as well as the installation of equipment for improving indoor air quality in Boulder, CO.

A variety of indoor air quality products are available to address specific issues with air quality. We offer the installation of a variety of products for better air quality. We can help you improve your air quality with air cleaners and purifiers, humidifiers, dehumidifiers, and UV germicidal lights. In some cases, poor air quality is caused by a problem with the ductwork. A duct system can collect contaminants such as dust, pet dander, pollen, and mold spores. It is important to reduce the level of pollutants inside your ductwork by having your ducts cleaned.

Let Welzig Heating and Air Improve Your Homes Environment

Choosing equipment to improve your indoor air quality can be a confusing process. If you are interested in improving indoor air quality in Boulder, we are happy to assess your air quality, discuss your concerns, and assist you in comparing options. To meet the needs of any air quality problem, we offer a wide range of options. We are a family-owned and operated HVAC company that has been in business since 1994. With our BBB accreditation and NATE-certified technicians, you can rest assured that you are in good hands with us.

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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