When air-sealing a house, does it always make more economic sense to make the house as tight as possible and then add mechanical ventilation or to air-seal down to some building tightness limit?
I'm working for an energy efficiency retrofit program. We have a very limited budget for our houses and therefore have been air-sealing down to the Minimum Building Airflow Standard (ASHRAE 62-89) so that we don't have the extra cost of mechanical ventilation. Is this flawed thinking? Is it usually in the economic interest of the client to air-seal as much as possible and then have the extra cost of putting in a vent fan?
Posted Tue, 06/08/2010 - 17:54
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