After extensive researches, DEHA engineers developed accurate room thermostad which controlls and fixes temperature of room. As diffrent from ordinary room thermostads, this invention controls the set temperature of boiler, instead of turning on and turning off boiler with a suitable prinicible of burning solid fuel. This system provides you to not to go to the boiler for adjusting set temperature of boiler to have a stable temperature in your room. Accurate temperature controll of room provides also less fuel consumption and maximum comfort. This property is provided as optionally for our Transposer-Reciprocating Series and Huge Fuel Series boilers.