I just finished converting an 8x8 plastic shed to a functional coop for my birds. There are screened vents at the peak of both sides. I installed a fan at one vent to draw hot air out. It's controlled by a thermostat. I set it at 80F, but the sensor is at the top by the dark colored roof, so it gets to 80F well before the rest of the coop. What would be a good temperature for the chickens? It doesn't need to be cool, just not boiling hot. Please chime in if you have a fan. Thanks.