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To begin determining the BTU's needed for any kind of room, you initially need to acquire its square footage by multiplying the areas length by its width. A ceiling elevation of 8 feet is assumed. To compensate for taller ceilings, raise the square video footage by 12% for each extra foot of ceiling elevation. For instance, a 12 x 12 room amounts to 144 square feet. If the ceiling elevation were 9 feet we would increase 144 x 1.12 for an overall of 161 square feet, Read More.

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