Go even further by setting a minimum speed that the fan will run at constantly and would only increase when triggered. Features steel shutters that are weather and corrosion-resistant, and automatically close when not in use.
I bought one of these about a year ago for my greenhouse. I ended up needing a second one. The first one was great once you figure out the programming. It ran the whole summer, it even got wet a few times from mist, no glitches except you could not read the display until temp dropped in the evening. Got the second one with the updated display and bluetooth, now running both with no problems. Very well designed and built.