These guys (one guy) came to my door on Friday evening. Wanted to come in and look at my furnace ducting to see if I was eligible for an "upgrade". I shoo'd them away.
He was talking about checking for uninsulated ducting, etc. that would qualify me for some sort of efficiency upgrades. I didn't talk to him long enough to find out what the catch was, cost, etc. If you come to my door uninvited, I will almost certainly tell you to get lost.
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