I cannot hold my hand close to air exhaust - what a waste of heat?
I am planing to run metal pipe over the air exhaust with outflow water from the heater to collect/recover some heat.
I also think to run the return pipe to the pool above the ground. What is the reason to loose heat to the ground? This is why a pool gets warmed closer to night when the ground returns sun heat to the pipes.
What metal pipe will be safe for the pool chemistry?
Will the Galvanized Steel Pipe work?