Perko 3 in Chrome-Plated Zinc Cowl Ventilator

The Perko 3 in cowl ventilator provides a durable air intake or exhaust opening for boats using 3 in ventilation ducting. Its chrome-plated zinc-alloy cowl gives the fitting a bright finished appearance, while the black PERKO-KOTE base provides a contrasting mounting surface. The neck is threaded so compatible 3 in ducting can attach directly without a separate hose clamp.

The cowl opening is approximately 7-1/3 in square, giving the vent a broad intake area above the duct connection. Direct thread engagement at the neck can simplify installation where access for clamps is limited. This design is useful for adding or replacing passive ventilation around cabins, machinery spaces, or other areas that use ducted airflow.

• Chrome-plated zinc-alloy cowl with black PERKO-KOTE base
• Threaded 3 in duct connection eliminates a separate hose clamp
• Wide cowl opening supports passive airflow
• Suitable for new ventilation installations or replacement work

This ventilator is a practical deck or surface fitting when a boat needs a finished 3 in duct termination. Confirm the mounting footprint, duct size, and airflow direction before installation. Browse more Mounting & Rigging Hardware for related products and compatible alternatives.