Recent Review: This company provided efficient, courteous service. When my 25 year old furnace malfunctioned on Wednesday of last week, during the first deep cold snap of the season, it was turned off by a service provider from a different company (not HSC), and I was advised that it would be dangerous to turn it on again. After reviewing the estimates I had received last year, I decided to have HSC replace the furnace. I called them from work on Thursday, and they agreed to honor the estimate that they had given me 6 months before. They also said that they would come to the house early Friday to get the old furnace running for the weekend since they couldn't put the new furnace in until Monday. (I couldn't be back soon enough to let them in on Thursday.) The service person came on Friday and the house was warm for the weekend. I am annoyed that the other company let me suffer through two very cold nights and thankful that the HSC service person knew what to do. He was careful, took his time, despite it being the end of the day, and explained what he was doing and what he thought was wrong with the furnace. Even though the house was warm, the furnace was clearly at the end of its life and had become unreliable. It was time to replace it. The HSC people came on Monday morning and four hours later, left me with a quiet, clean, high efficiency furnace purring away in the basement. They were polite, quiet, worked very quickly, cleaned up afterwards, and answered all of my questions. Since the air conditioner is also 25 years old, and we have had problems with it as well, HSC will be installing a new one as part of the package. The inside fittings were installed along with the new furnace. The condenser and other outdoor components will be installed in the spring, when the snow is gone.