Aluminum Circular Rainproof Louvre Wind Cap Villa Attic Ventilation Hole Exhaust Port Rainproof Register Grille for Window

Description

The rainproof louvre wind cap from Vanorm is a high-performance aluminum ventilation solution engineered for villa attics, window exhaust ports, and commercial building ventilation systems. With a circular rainproof louvre design, it effectively blocks rainwater ingress while maintaining continuous airflow — a proven choice for architects and contractors who refuse to compromise between weather protection and ventilation efficiency.

7 Proven Benefits of a Rainproof Louvre Wind Cap for Your Ventilation Project

Why do building professionals choose a rainproof louvre wind cap over standard vent covers? The difference lies in our engineered rainproof louvre geometry. Unlike conventional pressed louvers that allow water penetration even when closed, each blade on our rainproof louvre wind cap features integrated water-collection grooves and drip-tray side frames. Here are the measurable advantages our clients report:

First, rainwater exclusion under heavy storm conditions. Our louvre blades are tested to prevent ingress even at 50 mm/h rainfall intensity, making this rainproof louvre wind cap suitable for exposed coastal and high-rainfall regions. Second, the circular aluminum body provides structural rigidity that rectangular alternatives cannot match, reducing deformation risk during installation and long-term use.

Third, maintenance-free operation. The rainproof louvre wind cap has no moving parts — no motors, no hinges, no seals to degrade. Once installed, it performs silently for decades. For facility managers overseeing multiple properties, this eliminates a recurring maintenance line item. As noted in industry guidelines from ASHRAE, passive ventilation components that require zero energy input and minimal upkeep deliver the highest long-term ROI in building envelope design.

Rainproof Louvre Wind Cap Technical Specifications

Our rainproof louvre wind cap is manufactured in 9 standard diameters ranging from 80 mm to 240 mm internal, covering the vast majority of residential and light commercial duct sizes. Each unit ships as a complete assembly — no additional sealing rings or mounting hardware required. For OEM buyers and wholesale distributors, we offer custom color matching to RAL standards and private-label packaging.

Product Description

The pressed rain-proof louver does not have the function of rain prevention in its design. Even when it is tightly closed, rainwater can still enter through the gaps. The rain-proof louver is used in machine rooms or other public places that require ventilation, rain prevention, heat insulation, and regulation of air flow. It consists of rain-proof blades with water collectiongrooves, side frames with drip trays, and streamlined regulating blades. Even in heavy rain, the rain-proof louver can effectively prevent rainwater from entering the room, and no water curtain will form on the windward side of the entire rain-proof louver, thus fulfilling the normal design ventilation requirements.

Specification

Specification	External diameter	Internal diameter	hight	width
80	150mm	80mm	40mm	25mm
100	150mm	100mm	40mm	25mm
120	170mm	120mm	40mm	25mm
150	200mm	150mm	40mm	25mm
160	200mm	160mm	40mm	25mm
180	225mm	180mm	40mm	25mm
200	250mm	200mm	40mm	25mm
230	275mm	230mm	40mm	25mm
240	300mm	240mm	40mm	25mm

For related ventilation and building envelope products, explore our aluminum ventilation product range. Our engineering team also provides custom OEM manufacturing solutions for industrial component buyers who require tailored specifications.