I don't usually go out of my way to write reviews, but I have used Mark Woodman many times and they have been one of the few companies I can really rely on for honest service. My furnace died on me February 2nd, because those things can only happen on a Saturday.... i called marks 24 hour line and got a call back in under 5 minutes. The tech I spoke to said he would be out within 2 hours and was there in under 30 minutes. My board had failed on my furnace and the tech had everything he needed on his van and my heat was up and running in under an hour. Thank you for being an honest and reliable company, one of the few left out there.