When our heater was giving us problems, I called Energy Technologies, and they said they would have someone out the next day at 11. Sure enough, they were right there promptly at 11, and took care of the repair for us. They did a great job and were quite helpful - set my thermostat wrong but I can't criticize for that. They took excellent care of us and got it going perfectly. They checked out the chimney to make sure it was open & clear, looked at the furnace, and they even did a functional test on our water heater. That's definitely above and beyond if ya ask me! We've always been very pleased with Energy Technologies and definitely recommend them!