Multiple heat outputs middle setting runs longer allowing for more even heat distribution regulates mild and colder temperatures lower energy consumption.
2 stage furnace disadvantages.
Higher upfront costs two stage furnaces are more expensive to buy than single stage models.
This is the primary reason the 2 stage gas furnace was developed so the furnace that you could have heating your home is closer to the correct size more times than not.
The good news is these new standards required a 46 watt reduction over the older style motors.
It s a fairly simple concept when the furnace needs to come on it can heat at a minimum of two different levels.
These motors were not new.
You ll save on monthly heating bills but unless you live in a cold climate you might not recoup your investment as fast as you hope.
You could buy a two stage furnace with an ecm motor for over 15 years.