|Heat exchange ventilation fan
|The ventilation which exhausts the air to
which the interior of a room became
and puts in the fresh open air indoors
However, the warmed indoor air is taken out outside by ventilation and heat loses by it.
This heat exchange ventilation fan is a ventilation fan which reduced the loss of such heat as much as possible.
|A heat exchange element uses the "heat"
which special processing paper has, and the
character which lets "humidity"
pass. When the polluted indoor air exhausted
and the fresh open air taken in pass a heat
exchange element, exchange of temperature
and humidity is performed.