This is done by matching the cfm rating for the your evaporative cooler to the cfm rating for one or more outlet shutters.
Wall mounted evaporative cooling system.
Self contained evaporative cooling system.
Rugged aluminum top and a water tight rectangular pvc extruded gutter.
How to size your evaporative cooling system.
This saves space and prevents a large appliance from blocking your view of outside.
Plus if you want to conserve a little energy you will be able to open your window for some fresh outside air.
Compact design heavy duty marine grade aluminium cabinet.
Wall mounted air conditioning units are simple to install and can be placed subtly high up on a wall.
Since this is a positive pressure cooling system you must have sufficiently sized outlets to exhaust air from the greenhouse.