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Abstract
There is no question that massiveness of building envelopes affects instantaneous heat transmission through them under transient conditions. In an attempt to include these affects in ASHRAE standard 90-75 calculations, masonry interests have developed a concept known as the M factor. It has been proposed that the steady state conduction equation specified in 90-75 be modified by a multiplying factor (M factor) to account for massiveness of the envelope.
There is no question that massiveness of building envelopes affects instantaneous heat transmission through them under transient conditions. In an attempt to include these affects in ASHRAE standard 90-75 calculations, masonry interests have developed a concept known as the M factor. It has been proposed that the steady state conduction equation specified in 90-75 be modified by a multiplying factor (M factor) to account for massiveness of the envelope.
Date
12/1979
12/1979
Author(s)
Thermal Performance Exterior Envelope Buildings Conf Book
Thermal Performance Exterior Envelope Buildings Conf Book
Page(s)
472-489
472-489
Keyword(s)
M factor; heat transmission; transient conditions; thermal performance
M factor; heat transmission; transient conditions; thermal performance