Can’t get the 20’ cu tubing evaporator snake in my HWH so am going to use this external HX as the evap. I already have a HW circulation loop with pump for my in floor heating system. My $20. offer was accepted. The stainless tubing on this 10 plate HX is standard ½” tubing OD, 0.630” so various fittings can be silver soldered or brazed to the cut off tubing, AR.
Stainless Steel Brazed Plate Heat Exchanger 8x3x1.5 In | eBay