Solatron Stainless Steel 8.5 inch Solar Vent/Fan with Rechargeable Battery for Boat, RV, Greenhouse, and More Moves 678 cubic feet of air per hour Prevent mold, condensation, mildew, musty odors, damp, etc. Ideal for boats, RVs, greenhouses, storage compartments, and any other area where air circulation is a problem Mounts easily on to the hatch of your boat, roof of your greenhouse, etc. No noise, safe and pollution free