Michael Bonsby Heating & Air Conditioning LLC

The job was not done.

Great work!

Excellent, as always!

Professional and fast team

happy with service

Not even an estimate.

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They worked five days on the installation. The technicians always were on time, starting each day around 8.30 am. They were very clean and didn't leave a mess during the whole week. They took time to explain the system. I strongly recommend Bonsby. I would use them any time again.

I called Michael Bonsby after being told by a another HVAC company that I need to replace my AC unit. I was expecting to hear the same but instead, the Michael Bonsby tech was able to get my unit running for a lot less than the 5k the other company was looking to charge me. The technician was prompt & professional and we discussed that while the unit is 10 years old, I should be able to get a few more years out of it. I would recommend

SELECTING THE CONTRACTOR We contacted a dozen contractors and received five proposals. Three contractors proposed to give us central air conditioning by installing an outdoor compressor and refrigerant lines to our 71-year old heating ducts. The ducts are sound but uninsulated behind the walls. Only one of the three contractors, BGE-Home, admitted that our heating ducts would require some modification in order to properly cool our master bedroom. BGE-Home bid $6,237, a very good price with an attractive compressor unit rated to deliver 36,000 BTU/hour of cooling. However, it became clear that central air conditioning through our existing ducts is not for us: We never need to heat or cool every room in the house at the same time. We mostly need air conditioning in the living room during the day, and in the master bedroom on summer nights. At least a third of an add-on central air conditioning system's cooling energy would be wasted: First, there are inherent inefficiencies in adding air conditioning to old heating ducts. Secondly, we would have to cool the whole house just to make the master bedroom comfortable on summer nights. Our new Mitsubishi installation is EnergyStar rated at SEER 17.5 BTU/Watt-hour for cooling. BGE-Home rated their installation "up to SEER 15", but two other contractors told us the add-on ducted system would likely achieve only a SEER of 13 BTU/W-h. The BGE-Home system would be inherently less efficient by 17-35% depending on which SEER estimate you believe. When you consider the waste of having to cool the whole house just to cool the master bedroom on summer nights, we concluded the Mitsubishi system would use 33-50% less cooling energy than the add-on ducted system. CAPITAL COST We received three proposals for a ductless split system. Again, our cost to this contractor was $6,174 after an $1,100 energy efficiency rebate from Montgomery County. The other two proposals were more than $2,000 higher, even though one of the two proposed the same machinery as did our winning contractor. THIS CONTRACTOR?S PERFORMANCE During the evaluation, we asked to visit an installation. The contractor took us to a home in DC where the homeowner praised the contractor and installation. We also must give this contractor top marks in every category. The installation crew discussed proposed details with us before proceeding, was about as neat and unobtrusive as could be, took great care with installation details, and finished the installation over two days, as promised. PERFORMANCE OF THE SYSTEM It is still January, so we have not used the system for cooling, but we have been using it for heating. It is quiet as a church mouse and pulls a significant amount of heat from the outside air even when it is 29 degrees Fahrenheit outside. We are using our gas-furnace less, so it is possible the Mitsubishi heat pump will reduce our heating cost. We have told the contractor we would be willing to show our installation to prospective customers.

They've been very responsive, very professional and helpful. They installed the system originally.

Called because emergency thermostat constantly staying on. Have used Micheal bonsby in past one time for an air conditioning repair. the technician determined the heat pump compressor was broken and given that the system was 16 years old i decided to replace the system. They sent their estimator 4 days later and he gave a price for a new system. I also obtained 2 other estimates and decided to go with Ron Air in howard county MD. They installed a Trane sytem and I would recommend this company. Micheal Bonsby gasve me an estimate on anothe brand which I decided against.

They worked with us and were very accomodating when an issue came up.

The work went well. I liked the guy that came. They were not the cheapest ones, but I really liked their system redesign. There were a few communications problems regarding how the system would be. Other than that I did not have any problem with them. They did a nice job. I would have been happier if were able to start and finish the work on time. They did a very nice job in cleaning up after themselves.

Bonsby and his guys did a great job and we could not be happier. They started by taking a manual J calculation to figure out how big of an AC unit we needed, which many companies don't do. This way we knew they weren't over selling us on a bigger compressor than we needed for our home. Tim Anderson was our estimator and he and Mike both spent a lot of time talking with us to discuss our options. We considered a traditional AC system, high velocity and Eco-i. We ended up going with the Eco-i option, though it is pricier than a traditional unit because it is so energy efficient. They started when they said they would and they finished when they said they would. I was particularly impressed with the fact that after they left each day you couldn't tell they had been there other than the hardware and units installed. Everything was cleaned up and nothing was left lying around. They also e-mailed us a daily progress report to let us know what had been done, where they were on the time line and what to expect the next day. When the job had been completed, they came by one more time to make sure we were happy and understood how to operate the new system. Though Mike is the owner, he was around a lot and we felt very comfortable with the whole team. I would absolutely recommend them to anyone who is looking for HVAC installs or repairs.

He is terrific. He used to work for a company, but now he is on his own and we decided to follow him. He is that good and I have been working with him for a long time. He is very professional. I would recommend him.