I went to a job last Friday, was called there because their Furnace got shut off and disconnected as an hazard. Got there, the customer talked to me angrily about how the bastards that shut their furnace off are lying and trying to make money off of them by blackmailing and coercing them. They wanted me to turn the heating back on. Well, okay then.
Went up into the attic and was trying to figure out what the issue is. Brand new furnace install. I see no issues. Wait a minute, why is the flue pipe going outside the house horizonally for 20 feet when it could just go a couple feet through the roof?
Wait.. no... oh my god. The flue is connected to a supply register in the family room. Keep in mind this is an induced fan motor furnace.
I about s*** a brick.
I asked her who installed that pipe. It was her husband. I asked why. Apparently, when the roofers came, they removed the flue so it was just venting into the attic, and sealed the existing hole for the old flue. When the husband went up to inspect the system, he noticed hot air blowing out of the flue and assumed it was supply hot air that got disconnected.
He could not find a register it went to, so decided it was a shoddy install by the people who put it in, cut a new register in the family room, and ran duct to it. It's been like that for over a year.
I explained to her that it's a miracle her family is alive.
She did not believe me, still, because I was trying to make money off her. And her husband "knows these things" better than I do.
I left it shut off and bailed from the house.