What is a two stage furancePost created: 2013-01-30 Type of Equipment: Furnace Views: 283
This question was created on the page: https://www.furnacecompare.com/furnaces/armstrong/enhanced-95.html.
On 2013-01-31 JB wrote:
You can learn about it here: http://homerenovations.about.com/od/heatingandcooling/a/Learn-Your-Types-Of-Furnaces.htm and here: http://www.fourseasons-chicago.com/news/2-stage-furnace/.
Basically, it has two settings High-fire and low-fire, which operate depending on how hard the furnace has to work to heat the home. If the temp is 40 degrees then it operate on low, which helps reduce the cost by using less fuel and running more efficiently. When it is very cold it runs on high thereby doing a better job of efficiently keeping the home warm.
By contrast a single stage furnace has one setting no matter the temp.
To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present. To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.