The HVI Publication 911: Certified Home Ventilating Products Directory© (CPD) is updated at least monthly and includes more than 2,800 residential ventilation products, providing builders and consumers with a wide range of ventilation options suitable for the varying climates and housing throughout North America. All models listed in the HVI-Certified Products Directory have been tested according to HVI procedures and have been found to qualify based on the requirements of HVI Publication 920©.
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