This lesson provides a table of window performance factors and how these factors relate to the different types of window glazing. The performance factors include: R-value, U-factor, solar heat gain coefficient, visible transmittance.
(9 minutes) This video explains how the difference in temperature between the indoors and outdoors affects comfort and energy consumption in the winter months.
(5 minutes) Windows are a major source of heat gain in the summer months, and this affects comfort and air conditioning costs. This window discussion includes solar gain, air leakage, and reflected radiation.