I currently live in a two story 2,400 SF house that was constructed in 2007 and has a Heat N Glo 42" Royal Hearth which is I believe is prefabbed. The HVAC unit is all electric and is inefficient to say the least. I am looking for ideas to improve heat efficiency, i.e. wood stove insert, pellet stove insert, free standing pellet stove, etc. I plan on using the heat as my primary source however I'm only home on nights and weekends. I don't know much about this and would like your input.