Previous replies are correct, there is not a reverse airflow fan-tray option for the Meraki MS switches. If you find that you need to deploy an MS in a data center with hot aisle / cold aisle layout, the options are going to be to use a shelf and place the switch on the shelf facing the other direction, or rack mount the switch like normal, but use something like a "Deflecto" magnetic vent cover on the cabinet door, such that the warm exhaust from the hot aisle isn't venting directly into the input of the MS switch. I've had customers do this with no issues. Hope that might help! ... View more