Heat Recovery Wheels How they Work

Learn how Heat Recovery Wheels work and the differences between a Sensible Heat Wheel and an Enthalpy Wheel. See how they are used in a Hospital and Gymnasium or Locker Room.
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[@derrickpatrick1206]

Good explanation and clear understanding of what an energy recovery wheel does. Thank you!

[@MEPAcademy]

Glad it was helpful!

[@J_G_G_R]

I've always learned to mount the fans on opposite sides of the wheel to prevent unnecessary leakage. Thoughts on this?

[@rickeyortutay6697]

You guys are Amazon I work with a lot of Aaron units and this is a great explanation of the energy wheel

[@MEPAcademy]

Thanks!

[@ryanbrown3283]

Great video, a really clear explanation.

[@MEPAcademy]

Glad it was helpful! Thanks for watching.

[@workingballer]

this is so awesome. thanks for the video!

[@MEPAcademy]

Thanks for watching.

[@troyyee8307]

Thank for the video! What methods can be used to assess the effectiveness of the heat recovery wheel in contributing to the operation of an air handling unit (AHU)?

[@MEPAcademy]

Seek out someone that can do a Life Cycle Cost analysis to determine the feasibility of installing one of them for your application. Maybe someone with the Certified Energy Manager (CEM) certification or similar.

[@shakeelbahar7459]

In this same way exhaust of toilet can wr use or not. My mean supply air will mixing with the exhaust or not

[@MEPAcademy]

No, toilet air should not be exhausted through a heat recovery wheel. ASHRAE guidelines recommend that air from spaces like restrooms (classified as Class 2 air) should not be mixed with supply air through a heat recovery device like a heat recovery wheel. This is to avoid the potential for contamination of the supply air with odors or pollutants from the restroom exhaust. Instead, restrooms should have dedicated exhaust systems that directly expel the air outdoors without recirculation or recovery. It’s essential to follow these guidelines to maintain indoor air quality and ensure occupant comfort and safety.

[@majedyassin1052]

If I have exhaust comes only from path rooms, can I use this exhaust for heat recovery?

[@MEPAcademy]

Yes of course, just confirm with the manufacturer that their version is acceptable for that use.

[@annarealubit9256]

How is PM or cleaning done for these ERV wheels?

[@MEPAcademy]

Preventative maintenance for a heat recovery wheel includes regular inspection and cleaning to ensure optimal performance and efficiency. This involves checking for and removing any accumulated dirt, dust, or debris on the wheel surfaces and in the surrounding ductwork. It is essential to inspect the seals and drive belts for wear and tear, replacing them as necessary to prevent air leakage and ensure smooth operation. Lubricating bearings and checking the alignment of the wheel can prevent mechanical failures. Additionally, monitoring the temperature and humidity sensors, as well as the control systems, ensures accurate operation and maximizes energy recovery. Regular maintenance helps extend the lifespan of the heat recovery wheel and maintains system efficiency.

[@josephcassidy4297]

Does a DOAS have a heat recovery wheel

[@MEPAcademy]

It's not required, but can be part of an energy saving strategy for certain applications.

[@nextgenradio4477]

i thought the fresh air entering the building is cooled, not pre heated. recovery when it turns its supposed to absorb heat energy, thus lower temperature of incoming fresh air

[@MEPAcademy]

Heat Recovery Wheels can work both ways, depending on the application and whether in heating or cooling mode. Heat Recovery wheels can add heat or remove heat from the entering air.

[@debysandoval]

Thanks!

[@MEPAcademy]

Thanks for watching.

[@khanjuma777]

If heat recovery fan is not working what happened to building

[@MEPAcademy]

This will depend on how the system is designed and the level of controls installed. If there is no redundancy, then of course the system will be out of commission until the motor is replaced. Depending on how critical the system is, there could be alarms setup to notify maintenance personnel of the failure.

[@prod3362]

I still.dont get it

[@MEPAcademy]

Do you have access to ASHRAE handbooks, as they have additional material that might help you understand.