Patent ID: 7942193

Claim:
An energy recovery ventilator (HRV) located within an interior space including a first set of rooms and a second set of rooms comprising: a fresh air inlet port for inputting fresh air from outside the interior space; an exhaust air inlet port for inputting exhaust air from the first set of rooms; a heat exchange core for transferring heat from the exhaust air to the fresh air; an exhaust air outlet port for outputting the exhaust air outside the interior space; a return air input port for inputting return air from the second set of rooms; a first fan for drawing the return air in to form supply air, for drawing the fresh air in forming a mixture of the fresh air and the supply air, and for blowing the mixture of the fresh air and the supply air into the interior space; a supply air outlet port for outputting the mixture of fresh air and supply air to the interior space; a second fan for drawing in the exhaust air through the ERV core, and for blowing the exhaust air out the exhaust air outlet port; a first damper having a first open position enabling the fresh air to pass through the fresh air inlet port, and a second position preventing fresh air from passing through the fresh air inlet port; a second damper having a first open position enabling exhaust air to pass through the exhaust air inlet port, and a second position preventing exhaust air from passing through the exhaust air inlet port; a third damper having a first open position enabling exhaust air to pass through the exhaust air outlet port, and a second position preventing exhaust air from passing through the exhaust air outlet port; a damper control for controlling the position of the first, second and third dampers, whereby when the first, second and third dampers are positioned in the closed positions, supply air, after passing through the first fan, is redirected by the first and second dampers through the ERV core, and by the third damper to the interior space.