Connecting very easy, at the start of heating the water was 16 ° and then 48 hours later the water was at 33 ° while the outside temperature not exceed 22 ° day and 7 night, it is to say its efficiency. To optimize I put a bubble over the tarpaulin tarpaulin Intex Intex protection. Price is quickly amortized seen use much more common, it's been a week that goes there every day even with the sky a little overcast so the water is warm. Long live the Intex heater.