​​​​​​​​​​​​​​​​​​Energy Recovery Systems

Reuse conditioned air and save

​Energy recovery systems recover thermal energy from the conditioned exhaust air to provide healthy indoor air quality (IAQ), saving building owners and operators on energy costs.

Most commonly used energy recovery systems are:

CenterPoint Energy recommends working closely with a design engineer to create the most efficient and effective design.

This chart summarizes the pros and cons of the most common types.

​​​​​ Fixed plate

Rotary wheel

Heat pipe

Runaround loop

Cross leakage

0 to 5%

.5 to 10%



Heat transfer

50 to 80%

50 to 85%

45 to 65%

55 to 65%

Capacity control

Bypass ducting

Speed control Bypass ducting

Tilt angle


CFM range






Large size at high CFM rates

Cross leakage

High air side pressure drop

Requires accurate sizing


No moving parts

Compact large sizes

No moving parts

Separate supply and
exhaust air streams