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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."

"They installed complete in one very long day and left my house almost as they found it. The system has been working fine for over a month."

"Excellent customer service. HVAC installers were great, showed up on time. Dave and Allen answered my many questions during the install. I Interviewed several local HVAC companies before deciding on Beltway. Highly recommend"

"We have a backup sump pump that I discovered had been installed improperly by someone else  (7 years ago).  Also, the check valve was leaking. Doug (owner) came out the same day and fixed it all up for us, making sure it was tested and good to go.  He was very friendly and easy-going, as well as diligent and professional.  Highly recommend them."

"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!"

"The installation team - Ramone Rivera - was professional and kind - great work"

"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."

"Except for a glitch in communication as to when they were coming to install, things went very well."

"I got quotes from a few different contractors. Carroll Mechanical’s was very competitive. It was the best value so I decided to go with them. The installers were prompt and did a fantastic job. The new system works great and they walked me through everything before they left. I have an ongoing maintenance so I know they will continue taking care of the new unit and making sure it works well. Overall, very happy with my choice."

"This was a combination Carrier Furnace/AC installation. The sales rep and technician were extremely professional, helpful, The installation was performed the next day. I highly recommend."