Reliable Comfort Inc have been putting furnaces in my homes since around 1990. I've used them in about 4 different occasions, from rentals, to homes I've built. Their front office is fine, and they always call me about 4 times a year, because I have a service contract with them. So they come and check on my unit, make sure the filters are clean, and that the unit is working properly. They even leave a a folder on the side of the unit, so you always know what's been done to it. It's very efficient. And, they're always pretty quick when you have an emergency, whereas other companies have taken days to get to me. Their prices are always better than most, and I continue to use them because of the way they do their business.