i have an old MB 55 Solo 140k BTU natural draft wood/coal boiler I’m not going to be using in my house. Friend who has a concrete companh was looking for a pool heater, I suggested he lets me borrow his skid steer and compacfor for a week to finish a parking area and I’ll give him the boiler. Even deliver and hook it up for him. Question is will this work to heat the pool if we get the right amount of flow going thru it or would this just be pissing in the wind? To me it seems like using a smaller pump that’s controlled with a close on rise thermostat would move just enough water where it would heat the pool but not pump so fast thru the boiler that it never gets hot.