Ventilation system components: extract units, sleeves, flexible ducts and grilles

VMC vents: which one to choose and how to maintain it?

A ventilation unit is the most visible element of your ventilation system on a daily basis. Apart from its aesthetic aspect, it is important to choose the right extract unit, as this device allows you to expel stale air from your home. Since it requires little maintenance, it is important to ensure that it is adapted to your ventilation system.

How does a ventilation unit work?

The extract unit draws air from damp rooms to the outside. It is an integral part of your ventilation system. Controlled Mechanical Ventilation (CMV), this ventilation element may differ depending on your needs or the type of CMV installed.

Humidity sensitive mechanical extract unit

humidity sensitive extract unit - bathroom - diameter 125 mm - 10 / 45 m3/h - atlantic 542465

These units have no power supply and are equipped with a nylon or linen braid that is sensitive to the ambient humidity. The elongation of the braid is proportional to the humidity of the air. By relaxing or retracting, the braid mechanically activates the air regulation flap of the ventilation unit which opens or closes under its action.

Humidity-sensitive air vent with electronic sensor

BAW PP 125L humidity sensitive extract unit - Battery operated and presence detection - 5 to 30M3 - Insulated WC

Equipped with an electric motor, this ventilation unit opens or closes according to the relative humidity level detected by a sensor integrated in the unit. The degree of opening of the shutter is thus modulated automatically. To operate, this product requires the use of a battery, but there are also models that can be connected to the mains.

Self-adjusting ventilation unit

self-regulating extract unit - atlantic be 30 j - 125 mm - 30 m3/h - atlantic 520233

Equipped with a silicon membrane, the self-regulating ventilation unit is regulated according to the air depression available in the house. Its main function is to guarantee a constant airflow in the room.

Where is a VMC vent installed?

The main function of an extract unit is to extract stale and humid air from a house. By extension, this means a place that is likely to be subject to regular water sprays. Thus, bathrooms, toilets and kitchens are the main rooms where this element must be installed.

In order to increase its efficiency, the ventilation unit should be placed high up and if possible above your bathtub, shower or cooker. Heat and humidity tend to accumulate on the ceiling and at the top of the walls. As a source of noise pollution, it is not recommended to install a ventilation unit in your bedroom or living room: in addition to causing a hearing problem, it could dry out the room excessively.

How do I maintain a VMC vent?

The maintenance of a ventilation unit is much more recurrent than the maintenance of your ventilation duct. In general, it is advisable to clean your air vents approximately every 3 months. In many cases, a ventilation unit is equipped with a clip-on cover. After removing it, clean it with a damp cloth and then remove the dust from the fixed part.

If you have a self-regulating ventilation unit, you can put it in the dishwasher for a complete cleaning. Otherwise, use hot soapy water and a soft sponge to remove the accumulated dirt. In case of stubborn dirt, we advise you to use white vinegar to remove the grease easily.