In business since 1990
HVAC
About us: "We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!"

Home air conditioning maintenance and tune-ups, Furnace or Heat Pump Installation, repair, or emergency service, General service, ac repair, and new installations or replacements , and 2 more
"Wonderful job diagnosing a flame sensor issue (after hours on a very cold night) and NOT charging me when all that was needed was to clean the sensor rather than replace it. Bravo blue dot!"
John O. in December 2021

Heat Pump - Install, Repair & Service, Central A/C - Install, Repair & Service, Gas Furnace - Install, Repair & Service , and 2 more
"Very professional - easy to make an appointment. Came on time worked within the estimate given and fixed my central AC efficiently."
Dinaz D. in August 2018

HVAC heating and air conditioning
"Knowledge on the unit was extensive. They provided important information or recalled parts and reliability of the unit."
Gary M. in December 2018

hvac
"Very professional and nice customer service, good price as well. For sure recommend"
Lulu L. in April 2024

Central A/C - Service or Repair
"I would hire this company again. MSR Heating and Cooling is A1 in my book."
786D90A0F15A73E8B930C35BBCAE54779C158136FD2218347BC68EAB899B1A6D 5. in June 2026
Duct work new Installation and Repair, HVAC (Residential & Commercial), Refrigeration (Walk in freezer/cooler) (Reach in refrigerator/freezer) Commercial Kitchen equipments
"Honest tech. Didn't upsell for things I didn't need. Definitely will call again for service or replacement on HVAC"
Tim V. in June 2019

In business since 2015
Swamps, Evaporative, Condensor
About us: "10 years of experience Proudly serves its customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today!As a family business we take great pride in over 30 years of experience, expertise and quality customer service that we provide to our customers. It is our mission to give you excellent workmanship and customer satisfaction from start to completion of a project."
HVAC
"Super professional and responsive! Managed to fix my AC in a timely manner. They were very knowledgeable and patient with answering all my questions."
Claudia A. in March 2024

Radiant Panel Heating Units - Repair, Refrigeration System - Repair or Service - For Business and/or Residential, Thermostat - Install or Replace , and 1 more
"The repairman was able to fix an issue that I had caused. he came on short notice and quickly resolved the issue."
Michael F. in December 2016

Drain Cleaning - Kitchen Sinks, Laundry Tubes, Bathroom Drains, Main Sewer Lines, Plumbing - Water Heaters, Leaky Faucets, Running Toilets, Sump Pump Repair & Installation & Much More, Air Conditioning - We Service All Makes & Models, 2 Year Warranty on Repairs, Annual Service Plans for Cleaning & Maintaining Equipment , and 2 more
"Jay was very helpful, knowledgeable and very responsive. I will work with him again!!"
melissa P. in June 2021
Gaithersburg HVAC & Air Conditioning Contractors are rated 4.7 out of 5 based on 1884 reviews of 1884 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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