If you need to control your BH room temperature to the optimum, this gadget is the most practical.
I called it as Smart Sensor.
It has two funtions. One is to increase the room temperature and the other is to reduce the room temperature.
You are provided with a switch to choose which type of regulator.
If you BH is alway on the high side you need to set the gadget to say 30*C and button set to downward temperature. Use can use the gadget to activate your humidifier or a cool fan.
If you BH is in a very cool area you might want to place a heater. The sensor can be set to the low tempoerature like 23*C and the button to be set so that it will move upward.
Very precise and accurate.