To provide a ventilation type heat exchanger capable of suppressing an air conditioning load at all times according to the temperature and humidity conditions of the outside air and the inside air.
This ventilation type heat exchanger capable of indirectly exchanging the inside air and the outside air with each other through a heat exchange element 10 comprises a heat exchange element group 1 formed of a plurality of heat exchange elements 10 with different latent or sensible heat exchange efficiencies thereof and an element switching means 2 switching at least one of the heat exchange elements 10 selected from the heat exchange element group 1 so as to form an indirect exchange flow passage for the outside air and the inside air. Also, the heat exchange element group 1 may comprise at least the sensible heat exchange element 11 mainly performing sensible heat exchange and the latent heat exchange element 12 mainly performing latent heat exchange.
TONO NOBUYUKI
MORITA KAZUHISA
YOSHIDA NORIO
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