4.5 
2.8k+ *The Angi rating for Boiler Installation companies in Gaithersburg, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
*The HomeAdvisor rating for Boiler Installation companies in Gaithersburg, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
Last update on May 20, 2026
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
"It went perfectly. Randell was professional and my installers Walter and Eddy were the best. Would recommend company highly."
+13
Serving Gaithersburg, MD and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1982
Free estimates
Emergency services offered
"I installed a new Carrier HVAC system before this summer and have been very pleased with this company. From sales to installation to service, everyone in this company has been wonderful! Glenn gave me excellent pricing and the installation, by Jorge, Simon and Aaron was performed efficiently and neatly with excellent workmanship. Robbin quickly filed the appropriate rebate and warranty forms and when an error code subsequently exhibited, Craig promptly addressed my concern. I strongly recommend this company both for its excellent pricing and all around service. It is truly a pleasure to know that there are still great companies that focus on quality, service and customer satisfaction!"
+6
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"Not always as responsive as I'd have liked beforehand, had a discussion with them about it. Install went well despite a cure ball I gave them the morning of the installation."
+7
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2014
Free estimates
Emergency services offered
"Sean, Shane, and Adam took good care of us for sales and installation. Great work, and a speedy installation."
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
"Except for a glitch in communication as to when they were coming to install, things went very well."
+73
Serving Gaithersburg, MD and surrounding areas
Approved
Credit card accepted
Customers say: True professional
"I had the best experience with Hecomo Heating & Cooling. My house's AC/heating system stopped working all of the sudden and the temperatures at the time were 90 degrees and up. I was desperate looking into many different companies. Many of them, came over to my house and did estimates at ridiculously high prices. Luckily, I found Hecomo. They came to my house, did an estimate and were ready to install my AC/heating unit very quickly and at a good price. Also, the customer service was great. They were there for me throughout the whole process. They explained to me everything that I needed to know about the system and the features. Everything is very modern and updated. I am very happy I found Hecomo."
+8
Serving Gaithersburg, MD and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
"The plumber was berybeasybto deal with and very experienced. He did a great job."
Serving Gaithersburg, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Warranties offered
"I won't know until next week how it went so hopefully it will still be 5 stars. They will start on installation soon. So far they have been very responsive and professional. Thanks, Janice"
+12
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"$99 diagnostic fee to identify the problem (two wires in the condenser were rubbed out from vibration and touching each other, which shorted the system, causing the thermostat to not turn on), plus $240 to put two pieces of electrical tape on them... Very professional and knowledgeable, but the actual repair portion of the price seems steep considering the nature of the repair. No new parts were installed or replaced."
+5
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"The system was installed as scheduled and is working great. The company representatives were friendly and helpful."
+3
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