Top Attic Ventilation Installation Services in Frederick, MD

(ZERO STARS) This guy (Alan Sabia) will take your deposit and run off with your money! I have been attempting to collect my refund for over a month and he refuses to pay me back for the work that was never done. He has no professionalism, no ethics, and n...

Alan Sabia and his band of cronies are nothing but thieves and jerks. I contracted them to paint my garage (red). They quoted me a price then went to work a week later. All good, right? WRONG. Alan and his criminal enterprise not only painted my gara...

He was prompt, professional and great on his rates. Definitely the way to go if you have multiple projects to do and don't want the hassles of calling multiple contractors.

Cornerstone does a fantastic job when it comes to Heating and Air Conditioning. They are highly educated in their line of work and pricing is on spot. Cornerstone is who you want to call when you have HVAC needs.

I wanted to install an AC system in my home and got three estimates. One company didn't do ductless systems (which I decided I wanted) and another dropped the ball, so I ended up going with Michael Bonsby, who also offered to do the job for ca. $3000 les...

They replaced my gas furnace/AC and a spacepak heatpump system within the last year. They also have done my maintenance for 3 years. Their mechanics are knowledgeable,communicative and polite. They are all required to take hvac continuing education class...

I got my furnace and AC replaced with this company in August 2017. I also had a full aeroseal of my ducts. After about a year, I had some problems with ducts leaking into my cabinetry. They came out and had the ducts insulated (at my expense even thoug...

Michael Bonsby replaced our furnace and AC unit in early spring 2017. The estimator was very thorough and professional. The quote was by far the most informative including explanation of the heat load calculations and why the system size was recommended....

The equipment appears to be excellent

OUR AIR CONDITIONING COMPRESSOR WENT OUT DURING THE HOT PART OF AUGUST. I DID NOT KNOW WHO TO CALL SO I LOOKED UNDER CARRIER AND ASKED FOR HELP. tHE NEXT DAY WE GOT A CALL FROM DAWN OF YOUR COMPANY WHO IMMEDIATELY SENT ABEL WHO QUICKLY FOUND THE PROBLEM...

We just bought our home and were looking for a contractor to replace existing 33 year old furnace and 18 yr old AC unit. Six contractors provided proposals to replace both units. Chris from Michael Bonsby was the only salesperson who performed a load calc...