There aren t many disadvantages to a multi staged furnace compared to a single stage but the most apparent one is the added cost.
2 stage furnace disadvantages.
By far though most two stage furnaces were sold with the older less efficient motors.
Higher upfront costs two stage furnaces are more expensive to buy than single stage models.
You could buy a two stage furnace with an ecm motor for over 15 years.
The good news is these new standards required a 46 watt reduction over the older style motors.
These motors were not new.
It s a fairly simple concept when the furnace needs to come on it can heat at a minimum of two different levels.
Sure it will carry a higher sticker price but don t let that be the factor deters you from purchasing.