the old one was broken and consumed vast amounts current (up to 250 a year !!) This can be regulated awesome, heat and rest periods prograsmieren! From 22 clock, the heater until 08:00 clock completely off !! which brings a temperature loss of about 1C but you sleep (for us anyway) much better without electricity! Consumption (have an ammeter) should be at 125 - 150 settle in, so is the price for 1 1/2 years already compensated! We can only recommend the product (self-install)!