Our 18 year old furnace stopped working on a Saturday night in early December. I called another HVAC company and they couldn't come until Monday, and when they did the repair was going to be approximately $1,000.00. When I asked the cost of a new furnace, the ballpark figure was $5,000.00 and we would have to wait for another 2 to 3 days. I called Hy Mark and not only was their price significantly lower, but they could install the next day! They were polite, professional, efficient and did a great clean up. Highly recommend them for any HVAC or plumbing work. Thanks to all.