Longmont, CO Tankless Water Heater Service Experts

At Welzig Heating and Air, we’re proud to provide comprehensive tankless water heater services for homeowners in Longmont, CO. Whether you’re looking for repair, maintenance, new installations or replacement services, we have you covered. Our NATE-certified technicians are trained to work on all styles of tankless water heaters including gas, electric, and propane models. We can help you determine if you need point of entry systems or whole-house systems for an unlimited supply of hot water!

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When you’re looking for a new water heater, the tankless option is a fine choice. This style of water heater is more energy efficient than traditional water heaters and also is built to last for much longer. We’ll help you figure out the most appropriate system for your needs, and we’ll install your new tankless water heater right the first time. If you are experiencing any issues with your tankless water heater, we’ll diagnose and repair the problem fast and effectively. Some issues you might experience include leaks, error codes, ignition issues, or lack of hot water. We’ll give you an upfront estimate for the repair costs so you won’t be surprised about any unexpected costs. When investing in a tankless water heater, maintenance is essential to keep your system operating smoothly. For this service, we’ll check your system for signs of wear and tear, check wiring and connections, and flush your system to remove any buildup.

Your Tankless Water Heater Pros, Welzig Heating and Air

If you are interested in our tankless water heaters or need maintenance, feel free to give us a call today! We’re here to answer any questions you may have about these systems and we can offer you advice on how to get the most out of your new investment. Our goal is to help you achieve greater energy efficiency and savings, while enjoying an unlimited supply of hot water at home.

Tankless Water Heater, Tankless Water Heater Service & Tankless Water Heater Installation Boulder, CO, Longmont, CO & Louisville, CO

Tankless Water Heater Repair, Tankless Water Heater & Tankless Water Heater Installation

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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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Longmont, CO