We are proud to sell and service the LENNOX™ line of high quality and reliable furnaces and air conditioners. We have earned the title of LENNOX™ Premier Dealer through our employees' commitment to 100% customer satisfaction. We specialize in servicing both residential and commercial heating and air conditioning customers.
We also install and service boilers, heat exchangers, automated thermostat controls and a wide array of accessories to satisfy all your heating and air conditioning requirements.

Hi, my name is Jimmy Welzig and I’m the General Manager of Welzig Mechanical. Thank you for visiting our website and if you have any questions or concerns please give us a call at (303) 678-7728 or email me at jimmy@welzig.com.

HVAC Service and Repair The best way to keep your equipment running at peak performance is to have a licensed HVAC professional do annual tune ups. It's also important to clean or change air filters once a month. Find the list of brands that we service and repair. Special Financing Options You want to enhance your home's comfort. The question is: How can you afford it? We're happy to accept all major credit cards (Visa, Mastercard, American Express and Discover) and offer special financing through American General. More financing information is available here. Save between 10% & 40% on Home Energy Products and Services. For every year that you fail to schedule service for your furnace (gas or oil), you'll wind up using 5% more heating fuel because of all the gunky buildup and you'll pay 10% to 30% extra for neglecting your central air conditioner. Read about our Universal Service Agreement. We are your Heating and Air Conditioning Experts. Find our more about our savings agreement here. Cooling Solutions Everything from air conditioners, to programmable thermostats, to humidifiers and heat pumps. They can all be found here. Look for technologies and features that help keep operating sound at a comfortable level. All your solutions can be found here.

Heating Solutions Did you know with a typical furnace, indoor temperature can vary as much as seven degrees from the thermostat setting? Variable speed and/or two-stage systems give you the assurance of precise temperature control. All your heating solutions are found here. Including programmable thermostats, humidifiers and heat pumps! Air Cleaners and Air Purifiers One of the best ways to combat indoor pollution is to attach an air cleaner to your furnace or air handler. That way, you can have peace of mind knowing your system is working to capture small contaminants in every room of your home. Here's more information on removing indoor pollution Humidifiers/Dehumidifiers To maintain proper moisture levels in your home, choose a thermostat that controls both temperature and humidity. You might also consider a variable speed and/or two-stage comfort system and dehumidifier. Read more about our humidifiers. Programmable Thermostats An ENERGY STAR® qualified thermostat, when property used, can save you about $100 every year in energy costs. To maximize savings, it's important to keep the thermostat at energy-saving temperatures for long periods of time, whether it's during the day when you're at work or through the night. Find out more information and to check out available rebates