
Serving Rockville, MD and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"Very quick service and very friendly and knowledgeable technician."


Serving Rockville, MD and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"Very quick service and very friendly and knowledgeable technician."

Serving Rockville, MD and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1982
Free estimates
Emergency services offered
"The work was performed professionally and promptly. We have had no problems with the unit since its installation, and we continue to use Presidential for our maintenance service, and are very satisfied."





+6

Serving Rockville, MD and surrounding areas
Approved
In business since 1936
Free estimates
Emergency services offered
"The technician (Dennis) was very knowledgeable and professional. 2 zone service performed and took time to answer all my questions. I plan to continue to use McCrea for all my heating and air conditioning services/repairs/replacements."




Serving Rockville, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Emergency services offered
"We received speedy and exceptional service. Service person Leron was professional, honest and knowledgeable. He was able to diagnose and repair the problem. Thank you! We highly recommend this company."





+118

Serving Rockville, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2009
Emergency services offered
Warranties offered
"We have used Doug 2 other times before, and had nothing but great experiences with him. When our pipe froze, he immediately came out to assist. And when I say immediately, I mean 11:30 PM. We had hoped to see him in the next day or so, but he came that evening. We were more than appreciative. The job required him to come back the next morning to complete, and he was here less than 10 hours later. We were without water for less than a day thanks to Doug. I cant begin to tell you how professional he is, he took the time to explain why this occurred, what would prevent it in the future, and what to expect going forward. With Doug, everything is above board, and there are no hidden costs. <br />"





+2

Serving Rockville, MD and surrounding areas
Approved
Credit card accepted
Customers say: Quick response
"Outstanding service. Edmond was very honest and completed the job flawlessly. I picked Hocomo to replace the whole unit with a new one."





+8

Serving Rockville, MD and surrounding areas
Approved
In business since 2006
Free estimates
Emergency services offered
"Edwin was FANTASTIC!!! I found him on the HomeAdvisor app after my home warranty company failed to respond to my work order for a broken A/C unit after 3 days. I called him and he was able to provide a same-day appointment within a few hours! When he arrived, he was very knowledgeable, professional, punctual, efficient, and came prepared with all the right tools. I was very impressed with his service and look forward to him servicing my HVAC unit in a few weeks for general maintenance/preventative service. It has been so hot lately that we needed urgent service and Edwin saved the day! I would highly recommend him to others. Thanks so much again, Edwin!!!"

Serving Rockville, MD and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
"Very satisfied with responsiveness, punctuality and professionalism! Danny was able to squeeze us into Blue Star's full schedule at a time that worked for us and called before the visit for clarification about the problem, and after the visit about how things went. John called before arrival to let us know about exact timing, and was very thorough in investigating the problem and then explaining the situation. After consultation, he was able to repair our system. John also discussed what to look out for in case there are problems in the future. We have had our AC unit serviced regularly by other companies, but we will never use those other companies again. Blue Star is superior in every way! Cannot recommend highly enough. Thank you, Danny and John!!"





+13

Serving Rockville, MD and surrounding areas
Approved (Corporate)
In business since 1949
Free estimates
Emergency services offered
"Our furnace finally bit the dust after 25 years of faithful service. I had TriState do several small repairs and maintenance on it over the years, and they always did a good job. So, when the last service rep told me it was finally beyond repair, we consulted with Comfort Specialist, Darren, who isn't just a salesman, but previously installed and repaired HVAC systems. He took lots of measurements, inspected the old unit and the runs to the outside and upstairs. He took his time making calculations and offered us several options on a new system. TriState uses Daikin furnaces, which are rated in the top 5 furnaces for dependability and efficiency. The price, I thought, compared to my two other neighbors, who also recently purchased new systems, was even lower than I thought it going to be. In fact, my neighbors paid more (by thousands) and have a smaller square footage footprint than my house. We've had the unit now for over a month, and so far, it's great. It is a one-zone system, yet the upstairs will only vary by one or two degrees. This is much better than the old unit. We're hoping this small variance in temperature will also apply when the AC is on in the summer. The installers were very professional, arrived on time and completed the work in a timely manner. I would definitely use TriState again, and will rely on them whenever I need service."





+2

Serving Rockville, MD and surrounding areas
Approved (Corporate)
In business since 1970
Free estimates
Warranties offered
"I’m back again to write another stellar review for GAC. Last year they replaced our HVAC system; this year we circled back and had them install a home generator. This was a long and drawn out process due to the various approvals needed from Montgomery County as well as coordination with Washington Gas (which ended up not just being a simple sign off but necessitating an additional, expensive upgrade to the gas line from the street to our home). Nevertheless, GAC did a fantastic job shepherding this process over the 6+ months of waiting on stakeholders, and they were also maximally accommodating to our family’s significant constraints on time and availability (due to health concerns related to a medically fragile family member). A special kudos to Sandy M, GAC’s master electrician, who took it on personally to ensure we were taken care of all throughout this process, going above and beyond with phone calls, text messages, personal visits, etc. on behalf of my family, I want to thank GAC and am giving top marks across the board for this effort which was complex , lengthy, and ultimately successful."

From average costs to expert advice, get all the answers you need to get your job done.

The cost of replacing an AC unit fan motor depends on warranties, labor, season, and more. This cost guide covers everything you need to know about this HVAC part.

Discover the cost of window AC installation, exploring factors like unit size, labor rates, outlet installation, accessories, and disposal fees.

Budget for AC coil cleaning costs based on factors such as cleaning frequency, coil type, cleaning method, accessibility, ongoing maintenance, and more.

Need an AC Recharge? Here’s how much it costs, what factors affect cost, and what to expect.

Budget for AC capacitor replacement costs based on factors such as the capacitor type, size, labor, potential repairs, location, season, and more.

Wondering who installs whole-house humidifiers? Hire a licensed HVAC technician. Learn what they do, other pro options, and how to hire confidently