Heat Recovery Devices Heat Recovery Devices Heat recovery devices are becoming much more common in contemporary kitchens. These devices are usually designed to recover and recycle energy for space and domestic water heating. Without recovery units, this energy would be wasted as exhaust. All of these energy recovery systems operate on the same principle.
Energy is recovered from outgoing air exhaust using a wheel, coil, pipe, or other device.
The recovered energy is then transferred to incoming air or water. In this design situation, the incoming air is warmed. Where the air leaving the kitchen is colder than outside air, it is cooled. This relieves some of the burden on the primary heating and cooling system, reducing energy costs. Another common energy recovery system captures heat rejected from on-site refrigeration or kitchen exhausts to produce hot water for domestic water heating.