Furnace

If your home's furnace ducts are more than 30 years old, it might be time to consider getting them replaced. Diamond Certified Expert Contributor, Mike Rebholtz of Alternative HVAC Solutions explains more:

Nowadays gas furnaces are divided into two groups based upon their energy efficiency: the 80% efficient group (standard efficiency or SE), and the over 90% efficient group (high efficiency or HE). When you look at the various manufacturers, they tend to have three models to choose from within each group; a single stage furnace, a two stage, and a variable speed unit. ...continue reading