For energy conservation, materials with high thermal mass are effective in climates in which the heat flow through the building envelope is
A)absent during a large part of the year.
B)unidirectional within a 24- h period during a large part of the year.
C)bidirectional within a 24- h period during a large part of the year.

Question

Quizplus · Accepted Answer

Materials with high thermal mass are most effective in climates where the heat flow through the building envelope changes direction within a 24-hour period. This is because these materials can absorb heat during the day and release it at night, helping to moderate temperature fluctuations.

For Energy Conservation, Materials with High Thermal Mass Are Effective