How to heat the water in the pool for two hours!
A simple wood-fired boiler to heat the water in the pool. Really working and economical option. To obtain this result on the solar collectors is unrealistic. Electricity is expensive and very long. Only firewood or gas.
The wood heater made for a couple of hours of steel pipe 20X2,8 mm length 8 meters and galvanized pipe diameter of 350 mm and a height of 1 meter. Used native a pump with a filter with a capacity of 2000 l/h.