HEAT EXCHANGING VENTILATOR

摘要

A casing for an air supply fan is divided into a casing (301) and a casing (302), and a casing for an air discharge fan is divided into a casing (401) and a casing (402).  The casing (301) and the casing (401) have the same shape and so do the casing (302) and the casing (402).  A projection (302a) provided to the casing (302) and a projection (402a) provided to the casing (402) are superposed over each other with opposed main surfaces of the casings (302, 402) in surface contact with each other.