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Temperature thru walls

Determine the temperature at each inside wall layer at the cavity (not stud) section of a northeast structure with the following characteristics:
Design Day = 20 deg F, Interior Temp = 65 deg F
Wall component layers:
  • Outside Air Film R = 0.17
  • Wood Siding R = 0.80
  • Plywood Sheathing 1/2"  R = 0.63
  • 3 1/2" Batt Insulation R = 11
  • 3/4" Gypsum Board R = 0.56
  • Inside Air Film R = 0.68
Given ∆T layer = (Rlayer / Rtotal) x ∆Ttotal
Answer

ARE 4.0 exam study: BS

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