The BBQ Pool Heater
When a person wants to use their pool in the winter, their immediate thought is no way because the water’s too cold. Then again, that’s why someone invented a pool heater. But this person didn’t have one of those and didn’t feel like investing in one. So, they had their pool pump pass over a makeshift BBQ pit to warm up the water before it gets shot back into the pool. The process then continued until all the water in the pool was warm and comfortable.