Don't let your grain get spoiled. Conventional aeration systems only dry from the bottom up and often fall short of drying grain in the center and top half of the bin.
Grain Guard fans work better because they:
The Grain Guard Rocket's unique louver design allows for easy cleanout as grain will not hang up on the rocket body. The downward facing louver ensures maximum airflow, even with a packed core where it's difficult for traditional fans to penetrate.