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ASHRAE Standard 70-2006 provides a comprehensive framework for testing and rating the performance of air-to-air heat recovery ventilators and energy recovery ventilators. The standard has undergone updates and revisions over the years to reflect changes in the industry and to improve the accuracy and reliability of the testing and rating procedures. By following this standard, building owners, architects, engineers, and manufacturers can ensure that HRVs and ERVs are designed, installed, and operated to optimize indoor air quality, energy efficiency, and equipment life.






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