If your primary interest is in evaporative cooling and you want the HRSM to come on at a specific temperature setting. Then this control is what you may need to automate your HRSM.

Watertight Nema 4X enclosure works great for evaporative cooling applications. Simply dial the desired temperature setting you would like the HRSM to turn on at; and this control will automate your unit to within a +/- 2 percent F differential range.

Designed to endure high humidity or outdoor conditions, this control comes supplied with convenient pre-wired electrical cords.