Lewmar Low Profile Rectangular Hatch – Size 20
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Sleek, Low-Profile Deck Ventilation for Powerboats and Sailboats
The Lewmar Low Profile Rectangular Hatch Size 20 delivers clean, modern deck ventilation in a compact footprint. At just 1” above deck, it sits flush and unobtrusive — ideal for powerboats where aesthetics matter, and equally at home as a ventilation hatch on any deck location of a sailboat. The anodized aluminum frame resists corrosion in saltwater environments, and the curved upper frame profile adds structural strength while maintaining the hatch’s signature low-profile look.
The lid opens up to 180° and can be operated from on deck via the outside handle, even when unlocked. A full range of spare parts is available. CE Approved.
Compatible Applications
- Powerboat deck ventilation — any deck location
- Sailboat ventilation hatches — cabin top, side deck, or cockpit
- Smaller to mid-size yacht foredeck applications
- Replacement or upgrade for existing rectangular deck hatches
- Suitable for both fresh and saltwater environments
Product Details
- Style: Rectangular, low profile
- Size: 20 (refer to Lewmar sizing chart for cutout dimensions)
- Height above deck: 1”
- Opening angle: Up to 180°
- Frame: Anodized aluminum for corrosion resistance
- Outside handle for on-deck operation
- Full range of spare parts available
- CE Approved
- SKU: 239-39920030
Parts Desk Insights
Best Use Case: The Size 20 is a popular mid-range ventilation hatch for powerboats and smaller sailboats — large enough to provide meaningful airflow and light, compact enough to fit in tighter deck spaces. It’s a common choice for side deck and cabin top installations where a larger hatch would be structurally impractical. Pair with a Lewmar Trim Kit for a finished interior look, and a Lewmar Lock Kit for added security.
Other Low Profile Rectangular Hatch Sizes
- Low Profile Rectangular Hatch – Size 03
- Low Profile Rectangular Hatch – Size 10
- Low Profile Rectangular Hatch – Size 40
- Low Profile Rectangular Hatch – Size 50
- Low Profile Rectangular Hatch – Size 60
- Low Profile Rectangular Hatch – Size 60 with Stay
- Low Profile Rectangular Hatch – Size 65
- Low Profile Round Hatch – Size 22
Accessories
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.