Recent Review: This was a massive project and investment for me, so i thoroughly vetted several vendors before choosing A&B. I chose A&B because i was very impressed with their responsiveness and professionalism throughout the quoting process. Surprisingly, they also had the lowest price as well. Another thing i liked a lot about A&B is that their core business is geothermal - even their office is heated and cooled by geothermal. The first piece of this big puzzle was to remove my old oil-boiler. A&B arranged to install the new (hybrid electric) water heater first so we would still have hot water throughout the demolition and subsequent installation work. Their plumbing guys were great, and really made it easy for me to work around the temporary installation while pulling out the old baseboard heater water pipes. I worked closely with the owner (Guy) and foreman (Phil) when planning for the placement of the new ducting. At first, I was concerned that the new ductwork would interfere with head space in the basement or that the runs to the second floor would be unsightly or inconvenient...but thanks to their expert planning and execution, the end result was everything i could have hoped for: a very satisfying basement and ALL of the 2nd floor supply/return ducting was kept inside my newly vacated chimney chase. They also did a great job with supply and return grill placement, including several that were inconvenient to install, but just slightly nicer for me, which i really appreciated. I took a few days off of work during the main installation days to see how this would all come together, and was impressed to see how thorough they were with sealing the joints (butyl tape). All of the basement and attic ducting was also very thoroughly insulated. A&B subcontracted the ground loop (trench and well drilling) to a company they work with frequently called Sima Drilling. They did great work as well. The finished system is both beautiful and amazingly efficient. Now my house is always the perfect temperature (geo provides heating and cooling!), and I'm saving money hand over fist EVERY MONTH. A&B is a great company to work with, and Guy was very easy to get a hold of, which i really appreciated. Take home message: A&B is a fantastic geothermal provider, and i would recommend them to anyone. If i could turn back the clocks, i would pick A&B in a heartbeat.