# FAQ: What Size Heater Do I Need For My House?

## How do I calculate what size heater I need?

What Size Heater

1. Multiply the length times the width times the height to calculate the volume in cubic feet.
2. Multiply the room’s cubic footage by 4 if its walls contain fewer than 3 inches of insulation.

## How do I size a heater for my house?

How to Calculate the Right Size Furnace

1. Calculate the square footage of your home.
2. Find out What Climate Zone Your Home Is In Climate is another factor that helps determine how many BTUs you need to heat your home.
3. Multiply your square footage by 40, the lower number recommended for the climate zone.

## What size furnace do I need for a 1200 sq ft house?

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.

## How many square feet will a 80000 BTU furnace heat?

80 X 1,000 square feet = 80,000 BTUs.

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## How many square feet will 40000 Btu heat?

To heat a 2,000 square foot home, you will need approximately 40,000 BTU’s of heating power.

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

TWO USEFUL FORMULAS Wattage: Multiply the area in feet by 10. For a room 20 feet by 20 feet, we obtain 400 sq. ft., multiplied by 10 to give 4000 watts. The number of watts = area x 10.

## How many square feet will 60000 Btu heat?

A standard that is used by heating and cooling equipment companies is to provide at least 25 to 30 Btu of heat per square feet in the home for a moderate to warm climate. A mid-sized home of 2,000 square feet would need approximately 50,000 to 60,000 Btu to heat it properly.

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

Heating a Poorly Insulated Room 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 1000 square feet?

Calculating the number of BTUs needed to heat an area 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.

## 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.

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## 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.

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

That’s why by knowing the square footage of the area we want to cool down, we can calculate how many BTUs should our air conditioner have. The equation for ‘sq ft to BTU’ is quite simple – multiply the sq ft with 20. That means that a 500 sq ft room needs a 10,000 BTU air conditioner.