Long spells of hanging on a mooring and cold, wet winter days in storage are great for breeding mold, must, and other unsavory onboard odors. The solution to this pollution is diffusion—that is, air circulation. Nicro’s Day/Night Plus Solar Vents form a multi-part ventilation system featuring interchangeable air intake and exhaust fans; the vents fit into deck through-holes and can move up to 24,000 cubic feet of air per day. Nicro claims the plastic vents are tough enough for a full-grown man to stand on and will not impede on-deck movement. Better yet, the solar-powered fans spin without draining your battery whether you’re on or off the boat.

From $140. Marinco Electrical, 707-226-9600, www.marinco.com

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