How to calculate btu. How to find how many btus your furnace should be. Fortunately calculating furnace size be it natural gas propane or oil is not rocket science. For a circular room measure the radius r which is the distance from the center to the edge.
1 btu 1055 joules 252 calories 0293 watt hour or the energy released by burning one match. For example if youre trying to heat 1000 square feet in a cold climate 30000 40000 btus will add significant warm air to your home. We often refer to the british thermal unit as a btu but the rating is actually the btus per hour or btuh.
Our btu calculator is designed to determine how many btus are needed for a single room. Results in btu h. To figure out what size air conditioner you require you first need to determine the amount of btus you require.
Most homeowners have difficulties figuring out what size of furnace do they need. Calculator to determine the capacity of the equipment to be purchased. Plug the radius into the following equation.
How to calculate btus. Btus stand for british thermal units and refer to the amount of energy your air conditioner is using per hour. Multiply these together to find the total cubic feet in each room and then.
For a triangular room multiply the length and width then divide by 2. Wondering what size air conditioner you need. How many btu furnace would fit your home perfectly.
A british thermal unit or btu is a unit of measurement of energy. Air conditioners are sized by the number of btus they put out. In more moderate climates multiply by 20 30.
The btu requirement will be for the whole room so you need to calculate the total amount of space the room covers. Btu is often used as a point of reference for comparing different fuels. Btu calculator room ac size guide.
To do that you need to measure the length width and height of the room so you can then calculate the cubic footage of each room by multiplying the length width and height of the room. And in cold climates multiply the square foot number by 30 40. It is approximately the energy needed to heat one pound of water by 1 degree fahrenheit.
L l h cubic footage. 1 btu is the energy needed to heat 1 pound of water by 10 fahrenheit. To help future furnace owners out we have developed a simple furnace sizing calculator.
Measure the length width and height of each room in the building. 1 watt is approximately 3412 btu per hour. 1 btu is the equivalent of 1055 joules or 293 watts.