One wall of a room measures 14 feet long and 8 feet high.  It's contains a window 5 feet wide and 3.5 feet high. The wall has an R-Value of 15.5. the unit R-value of the window is 3.5. Find the rate of heat flow through the wall when the inside air temperature is 68 degrees Fahrenheit and the outside temperature is 5 degrees Fahrenheit.

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.