2 Stage Gas Furnace Vs Single Stage

Single stage furnaces have a gas valve that opens at 100 capacity.

2 stage gas furnace vs single stage.

Dual stage furnaces are typically a bit more expensive than single stage models 250 600 more on average but it s often a worthwhile investment to achieve more consistent and comfortable heating and better energy efficiency. Quieter two stage furnaces run much quieter than single stage furnaces. If it is a 100 000 btu per hour furnace it is always burning at the 100 000 btu rate. Two stage furnaces generally only operate on high about 25 of the time.

Two stage furnace cons. Two stage furnaces also known as two speed furnaces operate much more efficiently than a single stage furnace. If your home contains two or more levels a two stage furnace will be able to warm it much more evenly than a single stage furnace and for less money. Two stage furnaces cost more 10 to 20 more depending on the brand and series.

Likewise a 95 percent afue single stage furnace is more efficient than a 90 percent afue two stage furnace. Not ideal for large homes two stage furnaces can be problematic in large homes unless the home has zone heating. While the initial cost might be a drawback there are several reasons why a two stage furnace could be a better match for your heating needs than a single stage model. The first stage of this type of furnace operates the majority of the time in most climates and runs at about 65 of the furnace s full capacity.

Two stage gas furnace valves can open at either about 70 or 100. Most homeowners find that two stage furnaces are quieter than single stages furnaces and they usually don t need to adjust their thermostats as often. More stable temperatures when running at its lower setting a two stage furnace provides a lower volume of warm air over a longer period. Also one reputable contractor recommended a single stage furnace stating that his experience is a two stage furnace in a two story house with our layout pretty typical doesn t work effectively.

You ll get a gentle steady flow instead of intermittent blasts. If it s rated at 80 000 btu s it will only operate at that capacity. Beware of the two stage furnace hype certain heating contractors will rave about the claimed benefits of the two stage furnace. However keep in mind the the furnace is only part of the equation.

That means that the 100 000 btu furnace can operate at 70 000 btus per hour or at 100 000 btus per hour. The cost factor in single stage 2 stage and modulating furnaces single stage furnaces are the most affordable. The difference between single stage and two stage furnace is the single stage furnace has only one heating output.