Rotary heat exchangers

The rotary heat exchangers has two types of form that are total heat and sensible heat recovery exchangers.
The rotary heat exchangers as a heat storage core, when the fresh air passes through a semi-circle of the wheel exchangers while the exhaust wind reverses through the other semi-circle of the wheel exchanger. In this way, fresh air and exhaust air will alternately transform through the rotary heat exchangers.