Patent ID: 6622508
Filing Date: 2003-09-23
Classification: F24F

Abstract:
A method for heat and humidity exchange between two air streams, one of which being hot and humid, at least during a first part of the year, wherein a first of said air streams is fed from the interior of a building to the ambient air and a second of said air streams is fed from said ambient air to the interior of said building, whereby said first air stream is cooled and thereafter transferred through a heat exchanger, whereupon it is transferred to a heater and thereafter transferred through a dehumidifier before being exhausted to the ambient air, whereas said second air stream is transferred through said dehumidifier and thereafter through said heat exchanger, whereupon it is cooled in a cooling device before being transferred into the interior of said building, characterized in that said second air stream, before being fed to said dehumidifier, is caused to exchange heat and humidity with said first air stream before the latter is cooled.