Often times, the furnaces in existing homes are too big for the heating requirements

of the home. Most people do not think twice about this, because as long

as there is enough heat there is no need to worry. There are a number of factors

to consider and some problems that could come up down the road though due

to having a heating system that is too big for a home. To find out why furnaces

are often over-sized in residences, some of the effects of over-sized furnaces,

how to tell what kind of furnace you have, and suggestions on how to reduce the

effects of furnace over-sizing in conventional, mid-efficiency, and high-efficiency

furnaces, see furnace over sizing.