Air leakage accounts for 15-25% of winter heat loss in buildings and can contribute to a significant loss of coolness in climates where air conditioners are used. Tight sealing and increased insulation levels, however, can also create problems with condensation and indoor air quality. Understanding how condensation works and in which climates it is more likely to occur can help limit its impact.

This course provides important information to ensure thermal comfort that can be applied at either the design and construction stage or during renovation of a residential home.

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