I hired Energy Technologies to replace a furnace 80% with 95% efficiency. They did a good job. They were missing a pipe, but they came back to finish it, when it was convenient for me, and they also gave me some credit on the bill for the inconvenience. They had very good customer service. The installers were good and the sales person that helped me, had good communication. I would use their service again and I would also recommend them to others.