What Size Forced Hot Air Furnace Do I Need

That increases efficiency and is usually reflected in a furnace s higher.

What size forced hot air furnace do i need. By doing this it will be much more energy efficient and your equipment will last much longer. If a furnace is listed with an input rating of 100 000 btu s and an efficiency rating of 80 it would produce. If that same furnace has an efficiency of 95 the furnace will produce 95 000 btu of heat. That means the furnace will produce 80 000 btu of heat.

But the average homeowner can t simply go out and buy just any furnace. If you get the sizing wrong you will have a hard time escaping winter s chill and or your energy bill. 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. Furnaces with intermittent direct spark or hot surface ignition do away with the constant pilot light in various ways.

Most furnaces are offered in 15 000 20 000 btu increments so you just need to get close in terms of sizing. A high efficiency furnace generating 100 000 british thermal units btu with a 93 percent rating will produce significantly. For example a furnace with an input btu can have an efficiency of 80. If the furnace is putting out 1 000 cubic feet per minute of air flow the return system must collect 1 000 cubic feet and take it back to the unit.

The duct vent size will depend on the size of the furnace and the size of your home so you know how many vents you need in each room. 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 insufficient return system or one too large will reduce the efficiency of the heating and increase energy bills.

A furnace return system must collect all the air being put out by that system. 100 000 btu input x 80 efficiency. Furnaces have come a long way in efficiency over the past few decades. There will be cold or hot spots around the house.

In order for your forced air furnace to work properly you have to have the right sizes of duct vents in each room expelling air. The actual production of heat called the output btu will be the main factor in deciding which heating unit is right for your. The furnace s british thermal units btus will help calculate the size it needs. A furnace that is the appropriate size for your home will warm up your house gradually.

And if you re in need of a new furnace now is the time to act. You need to purchase the right size furnace to heat your home effectively and manage your energy costs.