If your Furnace is older than 20 years, then you must now consider replacing it.  Most furnaces have an expected life of 20 years.  There were a few models sold that only had a 10 year expectancy.

Furnace choices for forced air systems include:

1. 80% efficient.  These furnaces are the least expensive, they can be used with most existing masonary chimneys with flue liners.  They have a 20 year life expectancy.  They are equipped with high efficient blowers.  These blowers can sometimes overcome some ductwork  problems.

We offer the Concord line of forced air furnaces.

2. 90% efficient.  These furnaces make more efficient use of your gas dollar.  This is accomplished by using a secondary heat exchanger.  These furnaces use a PVC venting system.  This will require that the water heater have a flue liner.  This furnace will save an additional 10% on gas over the 80%s. High efficient blowers are a part of this furnace also.

3. 95% efficient are the same as the 90's but are an additional 5% efficient on gas.  This is most efficient forced air furnace on the market, and the Concord Furnace 95% is the best value for this type of furnace.