We are completing a new electric shed for our drying system. We are located in western Ohio and am wondering if we should add an electric heater for the electric room It is 12' x 12' and well insulated. Our thoughts go between bringing the moisture tester in the house after the season for protection and heating the area to help protect the electric panels from condensation as the weather changes throughout the winter and spring.

What would an electric cost be to run a heater for the winter months to keep the temperature at 40 degrees or so?  Thanks, Jim