Ocean Dove had no engine room blowers so I installed not one but two 4" blowers in the engine room, They are mounted on the back side of the Cockpit lock, out of view and harms way. They exhaust into the fwd and aft cockpit cubbyholes port side. The cowl vents are the screw on and off type and have a screw on cover if I need to make them water tight. Fwd blower (sucker) is piped to remove the hot air from the top of the engine room. The aft blower (blower) is piped supply fresh air to bottom of the engine room. I installed 2-pole double throw switch for each blower on the steering stand. They are wired so I can change the direction of each blower (blow or suck) as need. The Teak trim was removed to install the cowl vents and them refitted. The funny steering wheel on the wheel stand is a leather cover 40" folding Lewmar wheel.