What Size Furnace Do I Need For 1200 Square Feet

Ac unit size calculator accurately estimates the size of the central air conditioner unit you should install in your house.

What size furnace do i need for 1200 square feet. Btu charts furnace output and air conditioner size for a bungalow bungalow area sq ft furnace output btu hr air conditioner size ton built after year 1980 built before year 1980 built after year 1980 built before year 1980 up to readmore. Furnaces typically have around an 80 percent efficiency rating although more expensive high energy models have at least a 93 percent efficiency rating. 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. For cooler climates a very broad estimate of furnace sizing is to select one that generates 40 to 45 btus per square foot.

You can also get a rough estimate by looking at the square footage of your house. By staff writer last updated apr 17 2020 10 17 50 pm et. This chart is a general guideline that covers tiny houses to average size homes. The effective btu output which is based on its efficiency rating is a percentage of the btu input rating.

But before we buy an 80 000 btu furnace there s furnace efficiency to consider as well. Get the cost of 1 ton 2 ton 4 ton and 5 ton ac unit. Ac calculator uses your house size square feet climate zone efficiency and equipment type standard central air vs central heat pump to show you exactly what size central air unit you need. 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.

A mid sized home of 2 000 square feet would need approximately 50 000 to 60 000 btu to heat it properly. If this 1 900 square foot home is in washington d c however and the furnace you re looking at has an 80 percent efficiency the input rating should be 100 000 btus. Posted on november 30 2018 by rick welter. 2000 square feet x 40 heating factor from the chart above 80 000 btu actual output.

With a less efficient furnace operating at 80 percent efficiency this would require a. With a manual j report in hand you ll know exactly how many british thermal units btus of heating and cooling you need for your home. What size furnace do i need for a 1200 square foot house. At 40 to 45 btus per square foot you d need a 100 000 to 112 500 btu.

2 000 square feet x 40 btus 80 000 btu output required. Most 1 200 square foot homes needs a furnace with an effective output of 40 000 to 50 000 btus. Thanks to the equation we know we need 80 000 btus of heat.