I used this company because I had a amazon local voucher for a furnace tuneup. At first everything was cool, they came a few hours early which was fine for me and the main guy was pleasant and polite on the phone. When the team of three came inside my house, I was a bit concerned by their very casual attire and tattoo's but I told myself not to judge as that would be wrong. the entire furnace tune up and roto brush cleaning, among one other service, took them about 4 hours. My BIGGEST COMPLAINT AND ISSUE is that about two weeks after I had them service my furnace, it started making this horrible extremely loud noise whenever the heat was on. I live in Chicago where it gets awfully cold and running my furnace now wakes me up in the middle of the night because of this new noise. My 60 plus year old mother got on her back and opened the intake vent to see what was wrong, only to find that they did not properly tighten up whatever part of the vent that needs to be tightly closed as to avoid that awful noise. Right now we have it help together with duct tape and the noise persists still. My furnace never made that type of sound until I had these people mess with it, and now they won't return my calls or emails. Freaking pathetic. read more