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​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.
Rotary wheel
Heat pipe
Runaround loop
Cross leakage
0 to 5%
.5 to 10%
Minimal
0%
Heat transfer effectiveness
50 to 80%
50 to 85%
45 to 65%
55 to 65%
Capacity control
Bypass ducting
Speed control Bypass ducting
Tilt angle
Speed control
CFM range
>50
>100
Limitations
Large size at high CFM rates
High air side pressure drop
Requires accurate sizing
Advantages
No moving parts
Compact large sizes
Separate supply and exhaust air streams
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