Hours of Operation
Headquarters
2881 S 31st Ave #3,
Greeley, CO 80631
Service Areas
Our HVAC contractors service these Northern Colorado cities! Service Area List
An HVAC Company You Can Trust
What our customers say about us
Trustindex verifies that the original source of the review is Google. I submitted a claim through First American Home warranty and they assigned McCormick to take a look at my fire alarm. They called as soon as they opened and set up an appointment with Jake Hernandez to come out today! He was quick to diagnose problem and replaced the malfunctioning alarm. Thank you Jake for your exceptional service! Update 4-2-26 Josiah and Brian came out to tuneup and clean the A/C. They were friendly and professional explaining what was happening during the service. Thank you!!!
Posted on Google 
Marcia Jackson
Trustindex verifies that the original source of the review is Google. Always a pleasure to have McCormick Heating & Cooling over to keep my HVAC system up and Running. Justin and Josiah were professional, punctual, and explained some basic maintenance I should keep my eyes on. 10/10 would recommend Justin and McCormick Heating & Cooling to anyone needing such services.
Posted on Google
Nick Minar
Trustindex verifies that the original source of the review is Google. Angelo was a fantastic tech, his other coworkers were just as great, they took care of us 100% and left my furnace room better than they found it, very happy…Thank you McCormick Heating and Cooling!
Posted on Google
derrek majors
Trustindex verifies that the original source of the review is Google. Angelo was very good at his job, went above what was necessary to make sure everything was installed correctly and will remain safe for us for the future. Cleaned up everything and looks better than before he arrived. Thank you
Posted on Google
Yvonne Majors
Trustindex verifies that the original source of the review is Google. Wow! What a great experience. Justin was so cheery and fast. He got everything fixed and even changed out the filter. Thanks a bunch
Posted on Google
Kara Tuzinovic
Trustindex verifies that the original source of the review is Google. David and Jason replaced my H Vac system. They were so very knowledgeable and kind. They explained how to use and perform maintenance on my new system. I was extremely pleased how they showed care for my home. Thank you gentlemen I truly appreciate you both. I would recommend McCormick to anyone needing work with their H Vac system.
Posted on Google
Cathy Miller
Trustindex verifies that the original source of the review is Google. I’ve been using McCormick for 7 years now- they are very skilled at working on my non-traditional HVAC mini split system and have consistently saved me money over other companies. Josiah was able to diagnose and fix my heat issue on the spot! Thanks McCormick!
Posted on Google
Kimberly Lammertin
Trustindex verifies that the original source of the review is Google. Justin and the team at McCormick Heating & Cooling were excellent. They took the time to thoroughly diagnose issues with my boiler, test multiple valves, and walk through the system carefully to identify the most cost-effective solution rather than just recommending unnecessary replacements. Their approach was thoughtful, transparent, and very professional. Justin in particular was fantastic—knowledgeable, patient, and clearly experienced. He explained what he was doing at each step and made sure everything was working properly before finishing the job. In the end they replaced the necessary components and got the entire system running perfectly. It’s rare to find a company that is this honest, responsive, and detail-oriented. Highly recommend McCormick Heating & Cooling if you want quality work and technicians who genuinely care about doing the job right.
Posted on Google
Alexander Whiteman
Trustindex verifies that the original source of the review is Google. Quick service. In and out quick. Couldn’t expect anything better.
Posted on Google
Gavin Torres
Trustindex verifies that the original source of the review is Google. My entire experience was smooth, informative and successful! Angelo and David installed the new furnace. They were efficient and patient with all my questions. And they were knowledgable and friendly! Highly recommended for your HVAC needs! Thank you Mcormick!
Posted on Google
Isa Segismundo
Verified by Trustindex
Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
Meet Our HVAC Experts
The Installers
Top-rated, expert installers.
The Service Technicians
Quick responding, HVAC pros
The Front Office Crew
The team behind the scenes.
0+
Years of Service
0
5-Star Ratings!
0
Homes Served
0%
Satisfaction Guaranteed
...and counting!
Meet the owner.
Jesse Trout.
Colorado Native. HVAC Expert.
Leading the team, setting the standard, and making it all happen.
Giving back to our Colorado community
The ladies of McCormick Heating and Cooling were proud to volunteer their time at the Weld County Food Bank! They spent the morning shift bagging apples and boxing tomatoes to help support local families in need. Serving our Colorado community goes beyond heating and cooling - it’s about lending a helping hand wherever we can. McCormick is grateful for the opportunity to support such an amazing organization and be part of something that truly makes a difference.
