Asked by: Delina Hanschmidt
home and garden indoor environmental quality

How many BTU heater do I need?

Multiply your square footage by 20 BTUs to get a general estimate. Typically, plan to purchase a heating or cooling unit with 20 BTUs for every square foot of space you have.

Herein, how many BTU do I need to heat a 20x20 room?

Rule of thumb, of course. So the space you want to cool ( 20x20=400) should be doable wih a 1 ton (12,000 BTUH) unit. But I'd bump it up to a 15,000 - 16,000 BTUH to handle the hot, humid summer heat of your area.

Also Know, how do you calculate BTU for a room? For each room, multiply the BTU per square footage times the square footage of the room. For example, a home located in Zone 5 with poor insulation would require 60 BTUs per square foot. Therefore, a room that is 300 square feet will need 18,000 BTUs (60 x 300).

Likewise, how many BTU do I need per square foot?

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 does it take to heat a house?

For cooler climates, a very broad estimate of furnace sizing is to select one that generates 40 to 45 BTUs per square foot. At 40 to 45 BTUs per square foot, you'd need a 100,000 to 112,500 BTU furnace to heat your 2,500-square-foot home.

Related Question Answers

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How many BTUs do I need to heat my 24x24 garage?

A basic rule of thumb for forced-air heaters is 45,000 Btu to heat a two- to 2-1/2 car garage, and a 60,000 Btu garage heater for a three-car garage. The makers of low-intensity infrared tube heaters say that 30,000 Btu can heat a two to 2-1/2 car garage, and suggest 50,000 for a three-car garage.

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How many square feet will 5000 Btu heat?

Size and Ceiling Height
Area To Be Cooled (square feet) Capacity Needed (BTUs per hour)
100 to 150 5,000
150 to 250 6,000
250 to 300 7,000
300 to 350 8,000

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What size room will 20000 BTU?


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How many BTU do I need per person?

When calculating the cooling load for a particular space, managers can use a rough estimate of 600 Btu per person. So a quick estimate for a 400-square-foot office with minimal occupancy is about 12,000 Btu, or 1 ton of cooling.

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How many square feet will 5200 Btu heat?

A standard space heater provides approximately 5,100 BTUs, or 1,500 watts. That means that a standard size space heater is more than sufficient for a room with 144 square feet. But before you decide on what size space heater you need for your home or office, consider these factors.

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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.

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How many BTUs does it take to heat a 1000 square foot house?

A basic rule of thumb is that it takes 30 BTUs for every 1,000 square feet. At the most basic level, if you have a 1,000 square foot house, you'll look for a furnace that has 30,000 BTU output.

Essaddik Omesh


How do you calculate BTUs needed?

Calculating the BTU for your room
If you are calculating by yourself you need to: Calculate the cubic volume of your room in feet or meters. This is calculated by multiplying the height, width and length of your room. After that, multiply the figure by the following values for a rough estimate of your suggested BTU.

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How many BTUs do I need for a 12x12 room?

2. Find the correct cooling capacity for your room size
Area To Be Cooled (square feet) Capacity Needed (BTUs per hour)
100 up to 150 5,000
150 up to 250 6,000
250 up to 300 7,000
300 up to 350 8,000

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How do you calculate BTU for cooling?

To calculate the size, simply multiply the length times the width of the room or area to be cooled. Then, as a practical number, multiply that total times 25 BTU. This allows ample cooling, whether it is a rainy, moist day or a hot, sunny, humid day.

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How do you calculate BTU per square meter?

Multiply the width by the length and then add them all together. This is the square meterage, and since there are roughly 337 BTUs per square meter, multiply them by 337. Write this figure down. Step 2: Measure each of your south side windows and figure the square meterage of each (width times height).

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How many square feet will a 18000 BTU cool?

BTU Sizing Chart for Mini Split Systems
Area To Be Cooled Capacity Needed (BTUs Per Hour)
400 to 450 square feet 10,000 BTUs
450 to 550 square feet 12,000 BTUs
550 to 700 square feet 14,000 BTUs
700 to 1,000 square feet 18,000 BTUs

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How many square feet does a 60000 BTU furnace 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.

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How many BTU is 750 square feet?

Air Conditioner Sizing Tutorial. How much air conditioner BTU's I need?
Room Size Square Footage Recommended BTU Range
20'X20' 400 9000
18'X25' 450 10000
22'X25' 550 12000
25'X30' 750 14500

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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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How do you convert BTU to Watts?

BTU (British Thermal Unit)
For W to BTU/h conversions, 1 W is equal to 3.41 BTU/h. Therefore to convert BTU/h into Watts you need to divide by 3.41; to convert Watts into BTU/h you need to multiply by 3.41.

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