Patent ID: 7007740
Filing Date: 2006-03-07
Classification: F24F,Y02B

Abstract:
1. A system for balancing fresh air flow and exhaust air flow through a ventilator, said ventilator having an air-to-air heat exchanger operably mounted within a principal fresh airflow passage and a principal stale air flow passage, said system comprising: a first flow meter for connection to said principal fresh air flow passage across said air-to-air heat exchanger, said first flow meter for proportionally measuring mass fresh air flow through said air-to-air heat exchanger; a second flow meter for connection to said principal stale air flow passage across said air-to-air heat exchanger, said second flow meter for proportionally measuring mass stale air flow through said air-to-air heat exchanger; and at least one damper within at least one of said principal fresh air flow passage or said principal stale air passage, said at least one damper adjustable to change the amount of air flow within said at least one of said principal fresh air flow passage or said principal stale air passage, such that said first air flow meter and said second air flow meter indicate a substantially equal proportional measurement of mass air flow across said air-to-air heat exchanger.