Question: Heat loss occurs through windows by the following processes; (1) ventilation around edges; (2) through the frame, particularly if it is metal; (3) through the

Heat loss occurs through windows by the following processes; (1) ventilation around edges; (2) through the frame, particularly if it is metal; (3) through the glass panes; and (4) radiation.
(a) For the first three, what is (are) the mechanism (s); conduction, convection, or radiation?
(b) Heavy curtains reduce which of these heat losses? Explain in detail.

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