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Posts Tagged ‘ACHn’

Problems with calculating natural air changes

Wednesday, March 10th, 2010

Over the years the method for determining natural air changes (denoted as ACHn or NACH) has improved quite a bit, but for use in energy auditing, the current method is still problematic. Factors like building height, geographical region, and wind shielding have been adjusted for, but there’s still no standard for measuring the volume of a building.