What Size Furnace For 1800 Sq Ft House

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.

What size furnace for 1800 sq ft house. 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. This furnace would be suitable for say an older home in atlanta or los angeles and would be more than sufficient for a new home with good insulation. X 15 ft 150 square feet. 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. Let s go back to our hypothetical 1 900 square foot house. Ac unit size calculator accurately estimates the size of the central air conditioner unit you should install in your house. Figuring out an accurate hvac size involves 2 basic steps.

260 square feet. Furnace sizing depends a tremendous amount on your minimum winter ambient temperature so requires knowlege of your specific locale to even ballpark that. Determine how many btus of heating and tons of ac you need. X 15 ft 300 square feet.

At 40 to 45 btus per square foot you d need a 100 000 to 112 500 btu. 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. Get the cost of 1 ton 2 ton 4 ton and 5 ton ac unit. The manual j.

96 square feet. Use the old school equation. X 12 ft 300 square feet. 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. So for instance a 1 500 square foot home would look something like this. You should get a system sizing analysis done by an hvac contractor my ballpark guess depending on if you live in the northeast or in the mojave or arizona desert is somewhere between 3 and 5 tons of ac cooling capacity with 1800 sf likely more in the 3 4 ton size for most cases. 360 square feet.

A mid sized home of 2 000 square feet would need approximately 50 000 to 60 000 btu to heat it properly. If you find a furnace with 90 000 btus and an 80 percent efficiency rating your output will be 72 000 btus.