ALECOIL 5"x12" 50 Plates Heat Exchanger with 1-1/4" MPT Port Water to Water 316L Stainless Steel Brazed Plate Heat Exchanger for Water Heating, Floor Heating, Commercial and Industrial Refrigeration

Haven't installed it on the wood boiler yet, but built the assembly waiting for a warm day to hook it up. Seems to be constructed well and and fairly heavy. This is a identical setup to what is currently being ran to heat a 6000 gallon underground storage tank. The other wood boiler is smaller and we used a 40 plate as an proof of concept. No complaints as far as efficiency! If I remember correctly, 170⁰-180⁰ boiler water goes into the exchanger comes out around 145⁰'ish. The other side comes in at 56⁰ and goes out around 78⁰ish. Roughly about a 20⁰ delta throughout the entire heating process. It will bring the storage tank up to about 120⁰.

Just finished my install and have had it running twice. So far I have been very satisfied. My closed loop is running at 150 degree F and my open loop target temp is 120 degrees F. I started with 2,000 gallons of 48 degree water during my first test and raised the temp to 100 degrees F in about 2 hours. I still need to insulate the HX and all of my pipes.