Consider the heat losses through the four exterior walls of a house. The house is 9.0 m × 12.0 m and the walls are 3.0 m high. There are 12 windows, each 1 m × 1.6 m. The walls are uninsulated and have an R-value of R = 1.0 and the windows are (uncoated) single pane. The home owner has the option of either upgrading the windows to (uncoated) triple pane or introducing insulation into the walls to increase their R-value to R = 3.5. Which action will provide the greatest benefit? In this problem ignore doors and heat losses through the floor and roof.

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The Answer of Consider the heat losses through the four exterior walls of a house. The house is 9.0 m × 12.0 m and the walls are 3.0 m high. There are 12 windows, each 1 m × 1.6 m. The walls are uninsulated and have an R-value of R = 1.0 and the windows are (uncoated) single pane. The home owner has the option of either upgrading the windows to (uncoated) triple pane or introducing insulation into the walls to increase their R-value to R = 3.5. Which action will provide the greatest benefit? In this problem ignore doors and heat losses through the floor and roof.

Consider the Heat Losses Through the Four Exterior Walls of a House