U factor Calculation

     It is the amount of heat conducted by a substance per unit time, per unit kg, per unit the temperature difference of material.

K = BTU/hr

Q = UA Δ T, Q = Cp ΔT

                                      

_fi = thermal conductance of inside of the wall.

f₀ = thermal conductance of outside of the wall.

A = thermal conductance of air inside the material.