The guy at the end of this video has the best advice. He says to make sure you aren't at the mercy of the person you call. He says the way to do that is to keep your system maintained so that you don't need to make emergency calls because your system is broken on a hot day.
4 tips to avoid HVAC scams
http://www.angieslist.com - Your heating and cooling system is one of the most complicated parts of your home, and it accounts for more than half of your ene...