Natural ventilation grille

The terminal element of your air processing network, the ventilation grille is essential to ensure a supply of fresh air, prevent condensation, and secure heating installations. Unlike large DIY stores, ExpertByNet caters to professionals and demanding DIY enthusiasts by offering a targeted selection of transfer and extraction grilles, divided into two main material families: the plastic ventilation grille (for indoors) and the aluminum ventilation grille (for outdoors and facades).

Sizing: How to calculate the air passage area?

In the field of climate engineering, a ventilation grille is not chosen solely for its design. It must comply with strict standards (notably the DTU gas) that impose a minimum air passage area (in cm²). For example:

• For a boiler room (Low and high ventilation): The free area of the grille must be proportional to the power of the boiler to ensure safe combustion without the risk of carbon monoxide poisoning. Fixed-blade grilles (non-blockable) are mandatory here.
• For a bathroom or kitchen: The grille allows for air circulation. Be careful with models equipped with a mesh screen: the fine mesh reduces natural flow (pressure loss). Always plan for a grille that is slightly larger in size to compensate.

Choosing the right material and installation type

To ensure the longevity of your installation, each environment requires specific design:

• Outdoors (Facade, gable): Be sure to choose an aluminum grille. Whether raw, anodized, or pre-coated, aluminum resists UV rays, weather conditions, and does not degrade over time.
• Indoors (Partition, door, closet): The plastic grille (PVC/ABS) is lightweight, economical, and resistant to corrosion from humid areas.

Round or rectangular, recessed or surface-mounted?

For a quick renovation, surface-mounted grilles are fixed directly onto the wall by screwing or gluing. If you have a reservation (for example, a tubular core hole), consider our round recessed grilles: they often come with friction wings that self-lock in the PVC duct, ensuring a perfect hold without screws or sealant.