The best ventilation system will bring in an equal amount of air that
is removed from the home, while transferring the ‘energy’ from the leaving air -into the incoming air (so you don’t waste it), and filtering it. This is not as easy as it sounds. Manufactured E/HRV’s which perform this function have two air moving fans. One fan to bring fresh air in, and one fan to take stale air out. In most products available in North America - these two fans are tied to the same single motor. Now- if i have two duct systems, one to move air into the house, and one to remove stale air from the house... the only way that these two duct systems would have the same air flow is if (1) they were identical, (2) they were balanced with a differential pressure manometer after the system was commissioned, and the system never saw any environmental change. It is almost impossible for either of those two cases to be true.
Two Independantly Controlled Motors
The UltimateAir RecoupAerator has two independent variably controlled motors controlling two independent fans. With this capability, we have built in volumetric flow control - independent on each of the two air streams. This uniquely allows the RecoupAerator to balance incoming vs outgoing flow with different duct systems and a dynamically changing duct condition (filter load up, impeller load up, etc), and over its full range of flow settings.
The RecoupAerator is the only unit in the industry which has ‘flat fan curves’, independent on each of its two air moving fans.