Size Of Furnace Needed

Most furnaces are offered in 15 000 20 000 btu increments so you just need to get close in terms of sizing.

Size of furnace needed.

That s because choosing the right furnace isn t as simple as looking up a home s square footage on a chart. And if you re in need of a new furnace now is the time to act. To save energy money and avoid discomfort make an informed decision by using a furnace size calculator and discover the number of btus needed for your furnace to run satisfactorily. A more efficient furnace will output more btus of heat than a less efficient furnace with the same btu rating.

If a furnace is listed with an input rating of 100 000 btu s and an efficiency rating of 80 it would produce. Most homeowners know that installing a furnace isn t a diy kind of job but you might be surprised to know that merely sizing a furnace requires some special knowledge. Whether a home is open with a few large rooms or closed with. The size of a furnace is based on how much heat it can produce in an hour as measured in btus or british thermal units.

Different furnaces of the same input btu have different efficiencies measured in percentages. But the average homeowner can t simply go out and buy just any furnace. The size of the home is the first obvious factor in determining the furnace size but there are many other considerations also. Furnaces are efficient affordable and reliable but only if they work properly.

Furnaces are rated by the amount of fuel energy consumed when running called input btu. Next if you need to calculate the output you need on a gas furnace simply multiply its efficiency by its listed input rating for the btu output of heat. Natural gas for a furnace is priced by the therm or per 100 000 btus. A heating degree day calculation using the month of july as a factor is a more precise way of estimating furnace size.

An example you can reference. Furnaces are rated on their btus of energy consumption not their btus of energy output. If the furnace you selected is more than 10 below your heating requirement we suggest you go up to the next size. You need to purchase the right size furnace to heat your home effectively and manage your energy costs.

What size furnace do i need for my home. A btu is the energy required to heat a pound of water by one degree fahrenheit. 100 000 btu input x 80 efficiency. Several factors come into play including the local climate the layout of the.

If you get the sizing wrong you will have a hard time escaping winter s chill and or your energy bill. Better size bigger savings.