Nowadays, most AHUs Have a very secondary filter which happens to be either an electronic air filter or bag filter that features a filtration grade of all-around F9 or MERV13. This type of filtration quality not just shields the AHUs but will also offers cleaner air to the folks. In https://air-handling-unit-ahu-hir60470.ziblogs.com/31965859/the-smart-trick-of-air-handling-units-ahus-that-no-one-is-discussing