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6Greenheck. Energy Recovery Applicatios. ERA/110-03.
7ASHRAE. ANSI/ASHRAE Standard 84 1991 Method of testing air-to-air heat exchangers.
8ARI. ANSI/ARI Standard 1060-2005 Rating air-to-air energy recovery ventilation equipment.
9ARI. Guideline for calculating the efficiency of energy recovery ventilation and its effect on efficiency and sizing of building HVAC systems. Guideline V. 2005.
10European Committee for Standardization ( CEN ).British Standard EN 308-1997 Heat exchanger-test procedures for establishing performance of air to air and flue gases heat recovery devices. 1997.