Patent ID: 7168482

Claim:
A heat exchanger of a ventilating system comprising: heat exchange plates laminated with regular intervals so that a first air passage though which indoor air being discharged to outside of a building passes and a second air passage though which outdoor air being introduced into the interior of the building passes are sequentially formed; first corrugation plates attached to the first air passage and obtaining a space to allow the indoor air to pass therethrough; and second corrugation plates attached to the second air passage and obtaining a space to allow the outdoor air to pass therethrough, wherein the heat exchange plates are made of a paper material with fiber intensity and with a plurality of fine holes that are able to generate a capillary action, moisture of one of the indoor air in the first air passage and the outdoor air in the second air passage being absorbed by the plurality of fine holes due to the capillary action and being directly transferred from the plurality of fine holes to the other one of the indoor air in the first air passage and the outdoor air in the second air passage.