Monday, May 24, 2010

Heat Loss Calculations

Q = AU(delta)T

A=area of material U=1/R-value of material (delta)T =temperature differential

Total area of walls = 16,575.32 ft sq

Total area of windows = 323.2 ft sq

Total Area of doors = 84 ft sq

Take each area and divide it by the R-value for the material.

Walls - 10.175 = 1,629.02

Windows - .88 = 367.27

Doors - .88 = 95.45

Total = 2091.74

Multiply by the temperature differential. (outside temp during summer-desired temp, and then the same time for winter temp.)

average winter = 72 - 22 = 50

average summer = 72 - 70 = 2

Add these values together and add a blog entry showing the BTUH for each material and the total BTUH for the structure.


Building BTUH during winter = 104,587 BTUH

Building BTUH during summer = 4,183.48 BTUH

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