​​​​​​Runaround Loops
Reuse conditioned air and save
Runaround loops offer an energy recovery solution for the many applications where the exhaust air stream is far from the ventilation air stream making it difficult and expensive to use other methods. They can be built from a variety of materials with efficiencies ranging from 55 to 65 percent.
How it works
Runaround loops, also known as
coil energy recovery loops, use a coil placed in each air stream and connected by pipes filled with a heat trans​fer fluid, generally a glycol solution. A pump transfers heat from the exhaust air stream to the incoming ventilation air. This type of system is for sensible heat transfer only. Because the two air streams are separate units, there is no threat of exhaust contamination.
