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"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."

"Everything went extremely well. I found Grove a completely professional organization with highly skilled workers. Their plumber subcontractor handled the installation of all gas piping in my house, oversaw the hookup with BGE's gas line and installed the hot water heater. Grove provided a skilled crew of 5, with 2 working outside and 3 inside to remove all old equipment, do some duct repair and install the new air conditioner, gas furnace, humidifier and thermostat in 2 days. They also removed all debris from the worksite and swept it clean. Their work proposal included a year's maintenance, which I feel sure will be equally satisfactory. This was a big project (3 days including the plumber), but I am confident they would handle both small and large jobs with the same competence and professionalism. I highly recommend them."

"Amazing! These really know how to up the anti, regarding customer service. Where other folks quoted me at $300 for a look see (to include travel), charged me around $270 for everything. Now mind you, my hubby had already purchased the UV-C light and installed the electrical outlet. Even if he hadn't, I will still receiving estimates that were astronomical. No Frost followed up emails and phone calls. We were seen in a timely manner. There no hidden fees. I felt this company in being honest and I loved that Thank you note. No Frost - you guys Rock!"

"Project: Move our Heat Pump location. Very professional, courteous, respectful of our home and work area. Great people to work with. Will be my "Go To" for future HVAC needs."

"Perfect! Doug is an expert Plumber that knows private water system. He removed the old equipment and installed the new. Everything is still working great. The work was done almost 13 years ago. We used all Top of the line Gould Equipment. I probably should call Doug to replace it again because breakdowns with the water system can leave you stranded."

"The plumber that came out was professional and knowledgeable. Talk me through the process before starting and after installation cleaned up well, then tested everything to make sure there was no leaks in the system."

"Carlos was great, he explained everything in terms I could understand! I had to have another company come out last year because A/C went out, they were ok. I will always come back to McCrea! McCrea has been the company that my family has been with for at least 30 years!"

"Graham solution was amazing! Ricardo is a true representation of this organization. He came out in a timely manner, found out what was wrong with my system and replaced it. I am so thankful for Ricardo!"

Serving Mount Airy & Surrounding Areas Since 1949\nOne Hour Air Conditioning & Heating® of Mount Airy is proud of its long history serving the Mount Airy community. Our business began in 1949 as a furnace and air duct company. In the 1950s, we began building custom homes and commercial buildings. However, we devoted our attention to HVAC work full-time in 1993. Since then, we focused on making the residents of Mount Airy, Frederick, Gaithersburg, and surrounding areas in Maryland comfortable in their homes.

"The technician did an excellent job installing the faucets in the very tight space. He was professional and I would be happy to work with him again."