"Circulates fresh air in boat cabin? protects against mold, mildew and musty air. Now with even more power, the Nicro Day/Night Plus moves over 1000 cubic feet of air in an hour or 24,000 cubic feet of air a day (4" model). With direct to deck installation it easily replaces any existing 4" NICRO vent product. The Day/Night Plus has complete air and green water shut-off from below, as well as a built-in on/off fan switch.
Beckson C6 Vent-O-Mate Exhaust Vent
"Keeps boat dry all year. Draft free. Allows light below. Powered by slight breeze, will automatically exhaust up to 350 cu. ft. of stale, hot or damp air from inside a closed boat. Eliminates mildew and odors. Low profile, 2-1/2" H, reducing deck clutter. Rain cannot enter even when open. Ideal for heads, galleys, forepeaks and preventing damage to interior wood cabinet work. Easily installed. Requires 4" hole. Comes with 8" protective cover."
Description: Vent-O-Mate/Plastic Cover
Beckson C6SS Vent-O-Mate Exhaust Vent
Description: Vent-O-Mate/Stainless Steel Cover
Color: Stainless steel or White
"A solar powered exhaust vent that keeps the cabin cool during the hot sunlight hours. Built-in shut-off damper prevents water intrusion in rough seas. Fits a 3-3/4" installation hole. 700 cu. ft./hr. Comes complete with white plastic interior trim ring and mounting hardware. White ABS construction. 2-year limited warranty."
Marinco 7" Air Vent 500 Passive Exhaust Ventilation"
"A low cost, high volume passive exhaust vent. Only 7" in diameter, yet will move over 1000 cubic feet of air per hour in a 15 knot breeze. Includes a 3" white air vent."
Size: 7" x 1 3/4"