The auto-temp Switcher widget784
2-pros: This system can save lots of money and energy.
air condition will not be on high when it is cold and when it is not needed.
So the heater will not be on in the summer.
Cons: it may not be reliable to change with the seasons.
This can be very expensive.The product can take a long time to make
3-An automated system that switches the cooling and heater during the different seasons. It will change by itself when it starts getting hot or cold. it has sensors in the house that makes it change from A.C. to a heater . It is only one machine that does all the stuff. It is used in your house.