The interior of the ERV.
The interior of the ERV. Exterior air is drawn in (upper-right vent) and passed through the passive energy recovery core (center). Interior air is drawn in (upper-left vent) and also passed through the core. By the time the exterior air enters the house (lower-left vent) and the interior air is pushed out (lower-right fan and vent), the incoming air is within a few degrees of the interior air temperature.
Image by Dave South
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