Air-to-air, fixed-plate heat exchangers are used
for two separate applications - energy recovery and dehumidification.
In this application, the air-to-air, fixed-plate heat exchanger is usually used
to recover sensible energy. It is more cost-effective in smaller units (less
than 10,000 cfm). It is also used in cases where cross-flow issues are critical.
The exchanger preheats the supply air during winter and precools the supply air
In this application, the air-to-air, fixed-plate heat exchanger is used to
create a dedicated, 100 percent outdoor-air unit that provides dehumidified
ventilation air to a space at room-neutral temperature. It is used in
conjunction with additional recirculating air handlers or fan-coil units that
handle the sensible cooling load at the space. It is also used where the
ventilation cooling load accounts for the majority of the system cooling load,
and in humid environments where comfort and moisture control are the primary