What Size Furnace For 1800 Sq Ft

In the example above using an 80 efficient furnace the 2000 square foot home above would require a 100 000 btu input furnace which will produce the necessary 80 000 btu s output of heat.

What size furnace for 1800 sq ft. For this example using an 80 efficient furnace the 1900 square foot home above would require a 90 000 btu input furnace that produces 72 000 btu s of heating which is close enough to the 76 000 btu s required using the climate heating factor. Furnaces typically have around an 80 percent efficiency rating although more expensive high energy models have at least a 93 percent efficiency rating. The manual j. I have a 20 year old air conditioner that should be replaced.

But before we buy an 80 000 btu furnace there s furnace efficiency to consider as well. 2 000 square feet x 40 btus 80 000 btu output required. A mid sized home of 2 000 square feet would need approximately 50 000 to 60 000 btu to heat it properly. For cooler climates a very broad estimate of furnace sizing is to select one that generates 40 to 45 btus per square foot.

But there are a lot of details to consider in the process. At 40 to 45 btus per square foot you d need a 100 000 to 112 500 btu. The furnace is 12 years old so i will consider replacing that too. Thanks to the equation we know we need 80 000 btus of heat.

For this example using an 80 efficient furnace the 1900 square foot home above would require a 90 000 btu input furnace that produces 72 000 btu s of heating which is close enough to the 76 000 btu s required using the climate heating factor. I don t want to pay more than i have to so i wonder what the norm is for the size of a furnace air conditioner for an 1800 sq. With a less efficient furnace operating at 80 percent efficiency this would require a. The best way to determine the perfect hvac unit size is to have a manual j calculation done for your house.

In addition to weather and climate the size of your home also has a direct impact on the size furnace you ll need. Determine how many btus of heating and tons of ac you need. The more space. Variables let s talk about all of the variables that come into play when selecting a new air conditioner system or furnace.