# Quick Answer: How Many Square Feet Will A 80000 BTU Furnace Heat?

## Is it better to undersize or oversize a furnace?

An undersized furnace will work fine for the majority of the time, but every once in a while it won’t get the house quite as warm as desired.

An over-sized furnace will keep the house warm no matter how cold it gets outside, but it does so at a cost.

First, it will probably make the house less comfortable..

## What size furnace do I need for a 1900 square foot home?

Heating Guide 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.

## How many BTUs do I need to heat a room?

For example, a 300 square foot room typically requires 7,000 BTUs to maintain a comfortable temperature, while a 1,000 square foot room requires 18,000 BTUs. A simple formula to determine your heating needs is: (desired temperature change) x (cubic feet of space) x . 133 = BTUs needed per hour.

## What size furnace do I need for a 1700 square foot home?

Using this information, you can get a rough estimate of your required furnace size based on your home’s square footage. The average Kansas City home, which is around 1,700 sq. ft., will need a furnace rated at 68,000 to 78,500 BTUs per hour. Your heating degree day can also provide a rough estimate.

## How much is a new furnace for a 2000 square foot home?

The average cost range for purchasing and installing a gas furnace designed to heat a 2,000-square-foot home with a 97% efficiency rating ranges from \$3,000 to \$8,000, with most homeowners spending around \$6,000 total.

## What size furnace do I need for a 2000 square foot home?

A mid-sized home of 2,000 square feet would need approximately 50,000 to 60,000 Btu to heat it properly. With a less efficient furnace operating at 80 percent efficiency this would require a 60,000- to 72,000-Btu furnace.

## How do I choose the right size furnace?

How to Calculate the Right Size FurnaceCalculate the square footage of your home. … Find out What Climate Zone Your Home Is InClimate is another factor that helps determine how many BTUs you need to heat your home. … Multiply your square footage by 40, the lower number recommended for the climate zone.Sep 27, 2018

## How many square feet will a 45000 BTU furnace heat?

Reference a furnace size chart. A 1,200-square-foot home will require between 35,000 and 75,000 BTUs. A 1,500-square-foot home will require between 45,000 to 90,000 BTUs. A 1,800-square-foot home will require between 55,000 to 110,000 BTUs. A 2,100-square-foot home will require between 65,000 to 125,000 BTUs.

## How do you calculate BTUs needed?

Multiply your square footage by 30 BTUs to find out what capacity furnace you need. Alternatively, if you live in an older home in Zone 6, multiply your square footage by 60 BTUs to ensure you purchase a furnace with enough capacity to heat the space.

## How many BTUs does it take to heat a house per hour?

Average BTU Ratings A typical furnace is rated at 100,000 or 80,000 BTU per hour, but furnaces might be as small as 40,000 or as large as more than 200,000 BTU. A 90 percent high-efficiency rated at 60,000 BTU will deliver about 54,000 BTUs per hour of heat energy to your home.

## How do you size a furnace for a home?

Calculating Your Basic Heating Needs You’ll want to multiply your home’s square footage by the recommended heating factor to obtain the furnace output rating you’ll need. For example: If your home is 2,400 square feet and you figure 35 BTUs per square foot, you’ll need a 84,000 BTUH-capacity furnace.

## How many square feet will a 75000 BTU furnace heat?

A 75,000 BTU heater can heat a room of between 1,900 and 3,700 square feet in a cold climate if there is little to no insulation. In more temperate climates the heater fares better, heating an uninsulated room of any size from 2,400 to 4,600 square feet.

## How many BTUs do I need to heat 1500 square feet?

Size and Ceiling HeightArea To Be Cooled (square feet)Capacity Needed (BTUs per hour)1,200 to 1,40023,0001,400 to 1,50024,0001,500 to 2,00030,0002,000 to 2,50034,00010 more rows

## Is a higher BTU furnace better?

A heater with a higher BTU rating is more powerful — that is, it has a higher heat output — than one with a low BTU rating. It can do more to raise the temperature in your room each hour, so you can either heat a room more quickly or heat a larger space.

## How many BTU does it take to heat 6000 square feet?

APPROXIMATE BTU OUTPUT NEEDED BY SQUARE FOOTAGEAPPROXIMATE SQUARE FOOTAGEUp to 200Up to 600RECOMMENDED INSULATION4,000 BTU12,000 BTUMODERATE INSULATION6,000 BTU18,000 BTUPOOR INSULATION9,000 BTU27,000 BTU

## How many BTUs do I need to cool 500 square feet?

11,500 BTUWindow Air Conditioning Chart100 Sq. Ft.5,000 BTU200 Sq. Ft.7,000 BTU300 Sq. Ft.9,000 BTU400 Sq. Ft.10,500 BTU500 Sq. Ft.11,500 BTU2 more rows•Jun 15, 2020

## How many BTUs do you need per square foot?

20 BtuAs a rule of thumb, an air conditioner needs 20 Btu for each square foot of living space. But other considerations, such as the ceiling height and the size of your windows and doorways, might call for more cooling power. To measure your room, multiply the length by the width.

## What size furnace do I need for a 2500 square foot home?

In colder climates, you’ll want a furnace that generates 40 to 45 BTUs per square foot. At this amount, you’ll need 100,000-112,500 BTU furnace to heat a home of 2,500 square feet. A more accurate way to estimate furnace size is through heat degree day calculation.

## How many BTUs do I need to heat 1000 square feet?

To determine the number of BTUs per square foot that you need to heat a room, simply multiply the square footage by 20 BTUs per square foot. For example, if a room has 1,000 square feet, you would require 20,000 BTUs to heat it.

## How many BTUs do I need to heat 4000 square feet?

Chart of Recommended Heating BTU Per Square FootRoom/Area Size:Examples:Ave. Recommended BTU:100-200 sq ftSmall den or office4,000-8,000 BTU200-300 sq ftDen, office, small bedroom7,000-15,000 BTU300-400 sq ftEfficiency apartment12,000-18,000 BTU400-500 sq ftStudio/1-bedroom apartment, Tiny house15,000-24,000 BTU14 more rows

## Can a furnace be too big for a house?

Is Your Home Furnace Too Big? A bigger furnace in your home is not necessarily the best choice. Oversized furnaces can wreak havoc on your entire HVAC system, indoor air quality, and budget. When you are trying to increase the quality of your system, the last thing you need is for your “better” to be worse.