Mark was fantastic. He responded to our call on a weekend and came first thing Monday morning to check out our need for a new furnace – the existing one was 40 years old and had died just days before a predicted cold spell in the Seattle area. Mark’s estimate was over $1000 lower than the second one, and for a better furnace. We got a very high efficiency system, with variable heat and fan. It required a separate exhaust line, which Mark was able to run up an existing chimney to avoid going through the roof; it also required a new line to pump away condensate, which was fabricated and installed in a very professional manner. The custom-built header allowed the use of our old ducting above – Mark’s crew fabricated it on-site. They asked for room in the garage to set up a worksite, and they fabricated the sheet metal duct right there. We are very, very happy with the service we received from Mark, and love our new furnace. It was installed in one day, just before we got single digit temperatures and snow. Whew! Very knowledgeable and very professional. He seems quite laid back when you meet him, but he cranked out the job and did fabulous work.