While I still have access the these great minds...
I'm looking for heat exchanger that I could put on a furnace flue.
I have an old furnace, "updated" from coal 70 years ago. Still running strong, but not what you would call efficient. New efficient boilers can us PVC
for the exhaust, they get all the heat out of the units.
This flue right here runs up to 220 degrees, so wasting a bit of heat right out the chimney.
I never worried about all these years, but now I'm working in the basement more and need a little more heat. Seems silly to use electric heaters with this much wasted energy 12 feet away.
I've looked multiple times in the past and have given up, hoping someone spots something I didn't.
Obviously the first thing I looked at was exchangers for wood burning stoves and something similar, but now luck.
I thought about making something. The flue is 7 inches, thought about adding a bigger piece of pipe with and cross pipes and a fan or something. I also picture something I make to lead me to getting very sleepy in the basement one day..
I'll take any leads you might have,