Question: A double-door wood-framed window with glass glazing and metal spacers is being considered for an opening that is 1.2 m high and 1.8 m wide in the wall of a house maintained at 20°C. Determine the rate of heat loss through the window and the inner surface temperature of the window glass facing the room when the outdoor air temperature is -8°C if the window is selected to be
(a) 3-mm single glazing,
(b) double glazing with an air space of 13 mm, and
(c) low-e-coated triple glazing with an air space of 13 mm.
