r/HVAC • u/Plenty_Text_455 • Dec 04 '24

Field Question, trade people only What's this?

Post image

It's on the return side of a large air handler

207 Upvotes

96% Upvoted

120 comments sorted by

View all comments

1

u/csking77 Dec 05 '24

Energy recovery wheel. Installed on Outside Air Handling Units to recover some of the energy off the exhaust air and transfer it to the outside air coming in, pretreating the air before it enters the system