Used on a top venting greenhouse system. Old thermostat died (possibly corrosion) so needed a replacement. This was the only one I found at a decent price. If I had automated roll up sides, I could also hook up to this thermostat

This is a rock solid 2 stage thermostat and is less than half the cost of everything else I have come across made for greenhouses! It is simple to wire, rugged, waterproof, and easy to operate.