I needed to replace a 14 year old Water Furnace with a new one. The price from this contractor was substantially less than several other quotes. He was offering a Carrier/Bryant 50YDV-064 dual-stage furnace with ECM blower (Carrier/Bryant/Climate Master are all the same furnace). Nigel's price was $5864 for the furnace with 15KW backup heater, plus $1800 for installation. If the horizontal loop needed pumping out, he would have done that and replaced the flow center for approximately $1500. The exact same furnace installation (which may have included the flow center replacement) was quoted in the $14-15K range by 3 other HVAC contractors, and the equivalent Water Furnace best quote was approximately $11K. I opted to keep my flow center on Nigel's advice, due to their low failure rate. At first it seemed too good a price, so I looked him up on BBB and Angie's list to make sure. It took two weeks for him to work through his backlog of work and get to me. Installation lasted a little over 4 hours from start to finish; access to the area through a walk-out basement sped things up (these units weigh over 400 lbs). The installation quality is what I'd expect from the average contractor. They could have been a little less rushed, but in the end, the furnace I wanted cost thousands less than other quotes. It has been running well for two weeks. I can only conclude that other HVAC installers are gouging their customers by pocketing most of the 30% tax credit. By his own admission, Nigel does well out of installation ($1800 for half a day's work is proof of that) and doesn't need to make a huge profit on the furnace. Overall, I recommend him highly and would use his services again.