Family-owned and operated, Welzig Heating and Air pioneers the most exciting and beneficial improvements to home comfort and efficiency. We’ve proven that superior control over temperature saves money, reduces wear and tear on HVAC components, and makes for a more enjoyable living space. One of the easiest and most cost-effective upgrades you can make is the investment in a new thermostat.

Thinking of Getting a Smart Thermostat?

Consider the many rewards of a smart thermostat. Today’s generations of controls are sleek and aesthetically pleasing, user-friendly, and include touchscreen customizable displays. Choose a model that lights up when you approach, answers to voice commands, or uploads your photos. Take advantage of reminders for filter changes and maintenance, alerts for power outages, and energy-saving tips. Let us explain features such as geofencing, learning capacity, and zoning.

Upgrade Your HVAC System with a Smart Thermostat

One of the most basic and helpful perks of a smart thermostat is the ability to access programs and information through an app on your smartphone, computer, or tablet from virtually anywhere. However, these intuitive devices automatically accommodate your schedule to optimize energy savings and comfort. You can set and forget. And if something suddenly changes, bringing you home earlier or later than expected, a tap of your finger caters to your needs. Give Welzig Heating and Air a call at (720) 336-3777 for further information as well as smart thermostat installation, upkeep, repairs, and satisfaction guaranteed anywhere throughout Boulder, Longmont, Louisville, and Lafayette, CO.

Smart Thermostat Repair, Smart Thermostat Systems & Smart Thermostat Services Longmont, CO, Lafayette, CO, Louisville, CO & Boulder, CO

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Satisfied Customers
They Speak For Us

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.


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.

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