Set the timer so that it produces hot water only during the night this will enable you to use the cheaper night rate as recommended by your energy supplier. Watch out for frozen pipes this winter! Electric heating - economical, % efficient and safe all energy input is converted to heat, without any lost in waste gases. I was skeptical about the baking soda and vinegar treatment the first time i read about it, but sure enough, it works! A plumber is a person who installs,.