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 has AGAIN been awarded the
Angie's List Super Service Award for 2012

Welzig Heating and Air Angies List Award 2012

Welzig Heating and Air has been awarded the prestigious 2012 Angie's List Super Service Award.

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.

8/13/12 from Angies List: Welzig’s office staff were quick to answer and schedule an appointment for the next available technician. We received a reminder call the day before the appointment and then again the morning of the appointment.

The morning call was to see if we would be available earlier than the scheduled time. The technician, Chris, arrived on time and was very polite and professional. He performed the maintenance, inspected the evaporator coil and gave us options as well as recommendations.

This experience was consistent with the interactions we’ve had with other Welzig service technicians.

I highly recommend Welzig to any needing heating and/or air conditioning work/service.”

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.

As a thank you for your interest please feel free to

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FREE Air Conditioning Guide

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FREE Furnace and Heating Guide


Call us NOW for More Information at
(303) 678-5576

We Have AGAIN Won the Readers Choice Award For the 8th Straight Year!

AND Angies List
2012 Super Service Award for the 2nd Straight Year!

Find out WHY!
Call 303-678-5576 NOW