There is provided a fan assembly comprising a fan body comprising a first air inlet and a second air inlet, the first air inlet and the second air inlet being provided on opposing halves of the fan body. The fan assembly also comprises a first filter assembly mounted on the fan body over the first air inlet, and a second filter assembly mounted on the fan body over the second air inlet. The fan body further comprises a first retention assembly that is configured to releasably engage both the first filter frame and the second filter frame, and a second retention assembly that is also configured to releasably engage both the first filter frame and the second filter frame.
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