Bryant Boilers

Welzig always offers FREE estimates on your equipment replacement

Welzig Heating and Air enhances your comfort at every opportunity.  With skilled installation, seasonal maintenance, and prompt repair of boiler systems, we bring reliability to home and business owners across Boulder, CO and surrounding areas.  Family owned, we focus on lasting solutions that increase the value of your investment.  We recommend only top quality products with established track records of dependable, safe, and efficient operation.  Through meticulous sizing, accurate installation, and conscientious upkeep, our licensed professionals ensure peak capacity and optimum performance from all components, adding up to greater long-term satisfaction.  Let us handle your installation project, and we’ll provide the level of professionalism that has set Welzig Heating and Air apart since 1994.

Dependable Boiler Installations & Services

Through exemplary business practices, technical training, and expertise, Welzig Heating and Air has earned recognition as a Bryant Factory Authorized Dealer.  We are pleased to offer our residential and commercial customers a wide range of quality boiler systems, that combine high-efficiency operation, consistent durability, and precision temperature control into total satisfaction.  Take advantage of up to 95% AFUE ratings, modulating operation, and stainless steel heat exchangers to keep costs at a minimum and comfort at a maximum.  Our NATE-certified technicians establish your specific requirements and goals to recommend and design the ideal solution to your winter warmth.  For boiler services, including essential maintenance and skilled repair of all makes and models, call on the specialists from Welzig Heating and Air.  We provide 24 hour Emergency Service across Boulder, Longmont, Louisville, and Lafayette, CO, protecting your safety, comfort, and satisfaction every day of the year.

Zone Control with Boiler Systems

A major benefit of boiler systems is zone control. Remotely controlling temperature settings in a targeted area of the home or business without interfering with other sectors provides numerous advantages. You can significantly reduce heating costs by conserving energy in unoccupied rooms and directing heat to those areas that require it. Lessening wear and tear on the boiler helps to avoid expensive repairs while lengthening service life. Plus, the temperature in each zone can be customized to individual comfort preferences. Ask the professionals from Welzig Heating and Air about upgrading to zoning today!

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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