Homemade Pool Heater

[NS Gearhead]

I built a pool heater a few years back, i have a 10000 gallon pool, it heats it from about 15 degrees C to 30 degrees in about 3-4 hours. Its all stainless with a 4 pass heat exchanger for flu gas.

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That's impressive!

 

[Redneck in training]

I have seen somewhere on internet a pool heater made of black concrete slab around the pool with plastic hose embedded in it.