Heating & Cooling

Reliable HVAC Professionals

Whether you need a maintenance check or an emergency repair on a heating or cooling unit, we are available to handle all of your heating, cooling and ventilation needs.  We strive to exceed your expectations by ensuring that each of our clients receives individualized service!

Our Guarantee

Free Quotes

We will provide a thorough exam before deciding to replace your unit at no charge. If needed, our skilled technicians have been trained to install the highest rated appliances.

Customer Satisfaction Guaranteed

We combine our use of the highest quality parts and equipment and our dedication to delivering exceptional service. Warranty is included with all services.

Free Second Opinions

If you want a second opinion no problem! We’ll send a certified technician to you so can rest assured you have been given all the options with the latest HVAC technology on the market.


See our SERVICE tab for more products. 

Scheduled Services

Avoid common household allergens with a scheduled duct cleaning, filter replacements, and damper adjustments.

Customized HVAC Options

We’ll work with you to find HVAC solutions that fit your heating and cooling needs. We will provide you with a full consultation to explain all of your available options so that you can choose the system that’s right for your home or business.

If You’re in Need Of HVAC Service and You Live on This Map, Give Us a Call!

 Google (87 Reviews)

3 months ago

Positive: Professionalism, Quality, Responsiveness, ValueGroulx Mechanical has quickly become our go-to for our clients in need of heating and cooling repair. Mark and his team are always quick to respond, knowledgeable, and their customer service is exceptional. If you have any heating and cooling needs, I highly suggest Groulx Mechanical!

-Leslie Herz

2 years ago

Groulx’s team was awesome! Installation of a Mini-Split was done efficiently and we love the fact that we don’t have to freeze our lower levels to push cold air to our bedroom over the garage now. Our bedroom is really “chill” and the system is super quiet! Groulx Mechanical ROCKS!!!

-Belay Optics

8 months ago

Positive: Professionalism, Punctuality, Quality, Value.  Great small local company. Skilled, efficient, and friendly. It was a pleasure to do business with them. I will use them for ongoing maintenance and potential problems in the future.

-Chris Taylor


“Called yesterday with a furnace problem. Got a call Within 30 minutes of my message. Showed up today diagnose the problem, and got a new furnace in my house before I went to sleep. These guys are beyond amazing and I would recommend them for all services available”

-Cameron Qllin

“Ran by good people that always exceed expectations. Highly recommend!”


“Woke up yesterday at 4:30 am to 57 Degrees in the house. After doing what little debugging I could do (Pilot Light, Batteries in Thermostat, etc.), I called…I highly recommend Groulx Mechanical for doing service or installing a new furnace. Mark and crew were prompt, knowledgeable, and complete work in a timely fashion. Their services and merchandise are reasonably priced.”


Our Office

2447 Winding Drive Longmont, CO

Call Us

(720) 329-3429

Email Us