Website
Call
Carroll Mechanical Services Carroll Mechanical Services of Longmont offers residential and commercial installation and services. We pride ourselves on top quality service at a reasonable price. We have over 15 years of experience in HVAC installation and repair in the Longmont area. We install and service all brands and guarantee our customer's satisfaction.

Our technicians are professionally trained, licensed, reliable, and courteous. All your questions are our priority, as we are ready to serve all your heating and air conditioning needs! We also like for our past customers to do the talking.
Highlights and features
  • Commercial HVAC, Maintenance Services, Cooling Services, Design Services, Repair Services, Heating Services, Replacement Services, Residential HVAC, Systems & Equipment, Installation Services
Services
Air Conditioners
Report
Carroll Mechanical Services offers quality service, repair, and installation of all new and existing air conditioning systems to Longmont, CO and the surrounding communities. We pride ourselves on timely and quality service at a competitive price.
Boilers
Report
Carroll Mechanical Services sells and installs new boilers and offers maintenance and repair services for steam boilers and hot water boilers throughout Longmont and the surrounding community, including maintenance contracts. We can service virtually any brand of boiler.
Furnace & Heating
Report
Carroll Mechanical Services offers furnace installation, replacement and repair of ALL BRANDS of furnaces, heating and HVAC equipment in Longmont and the surrounding community.
Reviews (11)
Write a Review
Billy
Aug 10, 2022
Quality Work, Great Price! I used Brien Carroll to install new make-up air into my office. He was timely, efficient, and best of all, his price quote was 1/2 of the next lowest quote that I received for this work. I would recommend him to anyone. P.S., he also cleaned up after himself and there was absolute no mess for us to deal with.
Colin Stewart
Apr 25, 2022
Great company with skilled workers. I had to move an AC unit at my house and had several companies out to quote the job. Carroll was the only company not trying to quote a brand new furnace. Had a couple companies say moving the unit wasn't possible. Would refer to anyone.
J. D.
Jan 29, 2022
They were all very professional honest and affordable Fred the technician and both gentlemen he brought were great! They even cleaned up and hauled away all the unneeded equipment. Not to mention Janis and Nicole in the office are very knowledgeable and pleasant to talk with and Brian the owner explained everything and made us very comfortable with the services they were providing! We will definitely be using them again for all our future needs!
Cherilyn Ashley
Jan 27, 2022
Our heater went out today and the cold was coming tonight. Chris came out in 2 hours from my call and found out we needed a part. Nikki then called and said the owner Ben could go get the part in Denver and have it put in by 5:00pm. Then Fred came and put the part in and even cleaned out the water line. They all cared about us and having heat tonight. They went the extra mile for us. Thanks everyone at CMS. Cherilyn Ashley
Greg Gustin
Dec 27, 2021
I just tried Carroll Mechanical for the 1st time and had a great experience. I am a property manager and have recently seen some HVAC companies being misleading and trying to rip people off. It was a very refreshing change of pace to work with Carroll mechanical.
Jm D.
Mar 11, 2021
These guys installed a new furnace and AC in my place three years ago. It was a good experience and what I think is a fair price. What really sets then apart is the service. We just had our board go bad in the AC and it feels like they worked day and night to get us up and running again. Critical for a 100 degree week in June. Seriously-- people at my house 30 minutes after calling. Amazing service.
Marshal Norman
Dec 16, 2020
Our heater kept overheating and they called me right back and came out the same day. Dominic was very nice and professional and did a great job. He even called back several hours later (on a Sunday!) to make sure it was still working. Service: Heating system repair
Lin Dunbrack
Nov 22, 2019
We have been customers of Carroll Mechanical Services for many years and should have written this review long ago. This is a rare group of service providers who not only do top notch work on furnaces, water heaters etc., but sincerely care about their customers. During a recent health emergency our furnace stopped working and the whole team rallied in one day to get a part and come back after hours to get our home warm and toasty. Brian, the owner, should be proud of the culture he's created and the old school personal service he's offering. Big thank yous to Janice, Nicki, Chris and Andy. You will not find another service provider with as much expertise and heart as this group. CMS are our heroes!
Curt Brown
May 12, 2019
I like to support local, family-owned businesses. Carroll Mechanical, and the owner Brien, have been very easy to work with, and taken pains to make sure everything was done right. Installation of high-efficiency furnaces is complex. Make sure you find a good installer that has a lot of experience with the brand. These guys do. Highly recommended!
E. N.
Jan 17, 2017
First time I called, they gave me advice over the phone for a few simple things to check with my malfunctioning furnace. I got my heat going, and I made a mental note to remember them in the future. Next season I had more problems they fixed a blown fuse for a very reasonable price. Eventually I opted for a total furnace replacement. The install was tidy, the employees were guys you don't mind in your house, and Brien was very organized with rebate, warranty and permit paperwork. Satisfied customer, will be the first place I call in the future.
Kyle Felton
Nov 30, 2016
Brien Carroll of Carroll Mechanical Services did a Furnace Service/Cleaning for me and did a great job. I couldn't believe how much ash and debris he removed from my furnace. He also did a multi-point checkup on my old furnace, and he said it's good to go. He didn't try and sell me a new furnace, even though he did point out that my furnace is less than efficient. Great service at a very good price. I'd highly recommend Carroll Mechanical Services