What type of fan works best to install to keep the chickens cooler from the summers heat? I was thinking either a ceiling fan or a metal fan($100 one or more) and install on the wall pointing towards the roost. What would work best? I don't know if those high quality fans have an adjustment. Once we install the fan, our coop is 100% complete! Our summers get pretty warm. I'm glad it's only a short period of time. Dealing with winter weather is much easier.