Still doing all the things to make my new ( to me, built in 1995, but only had 3 years) house up to snuff. Working on energy, leakage, air quality etc. I was thinking about an ERV. So, had an estimate. Amazing. $1200 unit (seems a lot for a box, 2 small fans and a bit of corrugated plastic) a couple hundred in ductwork, and $3500 to install it. $3500 for what I can ( and probably will) do in a couple hours my myself. Don't know what "train" these guys rode in, but they were "trained" to keep a strait face.