There's no need for an AC unit. Plug your fan in and let it do the work.
If
Temperature rises above
This Trigger fires every time the temperature rises above a value you specify.
Then
Turn on
This Action will turn a WeMo Switch on. If the WeMo Switch is already on, it will remain on.
ID UXEJUGCN
Discover more time saving integrations for Netatmo Weather Station and WeMo Smart Plug