Saw something today that was a first;
On some duct work in a crawl space, saw these two, large…“pods” in line between the furnace and a vent for a bedroom at the end of the run. There is nothing between the furnace and the vent except for these “pods” and maybe…30ft of duct work; straight shot too. There are no wires (I was thinking some kind of inline fan to help push the heat) or valves or anything other than these two “pods”.
I have never seen anything like this. Any ideas?