We are there when you need us by offering 24/7 Emergency Service

Call Us at (303) 678-5576

Welzig Heating and Air,
your heating and air conditioning specialists,
is a locally owned and operated company since 1994.
We know how to save you money on your
heating and air conditioning needs.

Proudly Serving Colorado in the
Following Locations:

Longmont, Boulder, Dacono, Erie, Firestone, Fort Collins,
Frederick, Gunbarrel, Lafayette, Louisville, Loveland,
Mead and Niwot!

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.

Best Air Conditioning Longmont

We Continue to help Our Customers Take Advantage of the Rebates Offered by Xcel Energy   

Welzig Heating and Air is the Recipient of
Angies List Super Service Award for 2 Consecutive Years!!

Welzig Heating and Air Angies List Award 2012

This exclusive recognition is given annually to approximately 5% of service companies who achieved and maintained a superior service rating on Angie’s List throughout the past year.

This prestigious award recognizes the Welzig Team’s dedication to customer service and quality work and is highly esteemed by members of Angie’s List.

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 jim@welzig.com.

As a thank you for your interest please feel free to

Download either of our Heating or Air Conditioning Guides Now!

Click here to receive a
FREE Air Conditioning Guide

Click here to receive a
FREE Furnace and Heating Guide


We Have AGAIN Won the Readers Choice Award For the 9th Straight Year!

AND Angies List
Super Service Award Winner for
2 Consecutive Years!

Find out WHY!
Call 303-678-5576 NOW