Consider a Vertical South Facing Window in a House at 40ºN

question 16

Essay

Consider a vertical south facing window in a house at 40ºN latitude. For an interior temperature of $20 ^ { \circ } \mathrm { C }$ make a plot of the minimum $R$ -value as a function of outside temperature from $- 30 ^ { \circ } \mathrm { C }$ to $10 ^ { \circ } \mathrm { C }$ for which the passive solar heating exceeds the heat loss though the window.

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