Need help sizing a fan system for your greenhouse? Use our Exhaust Fan Size Calculator No wiring required! This is the easiest fan system to setup available. Just plug the fan into the thermostat. Then plug the thermostat into an outlet, and you are ready to go. Each ventilation system is packaged with all of the equipment needed to provide an automated fan system for your greenhouse, shop, or garage. All included items are sized to provide optimal functionality of each fan system. Links are...