I'm looking to heat my pool with my conventional wood boiler. I'm looking to do this as cheap as possible but want it to work. Currently I have a conventional boiler with the following: Basically the house is on one zone. When water in boiler reaches 180 pump kicks on running hot water throughout house. When water inside boiler cools off to 155 pump kicks off. Water hits 180 in boiler pump kicks back on, over and over etc. It is all run with copper My boiler also has a domestic coil 4" inside of boiler of which I have run into two hot water tanks to heat my domestic water. It is set up on a timer and runs about 4 hours intermittently though the day/night to keep hot water. It is run with pex Neither of the above are used through the summer. What would be the simplest way to hook into this system as is to circulate water to heat my pool. Also at my disposal is a gas pool heater. I havent opened it up yet but I'm assuming it has some type of heat exchanger in it that I could use. Looking for ideas on the simplest way to heat my pool without radically changing my system. Not interested in heating it all the time but maybe just weekends and certainly from time to time in may and sept. I thought about just teeing off the pex line and put shut off valves on each side and using domestic coil to produce hot water which I could circulate to the pool. the problem is that if my boiler reaches set point it will throw heat to the house as well. I thought about teeing into the copper lines that heat my house via baseboard and putting shutoff valves there as well. This would probably work the best as I wouldnt have to worry about heat getting pumped into house if domestic coil did not keep boiler under the pump set point. I would rather use the doemstic coil because its pex and not critical to my home heating but not sure if it would work that way or not.. Any thoughts?