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Persistent odors, humidity, mold... These are the consequences of a poorly or insufficiently ventilated house. To limit these inconveniences which can have a harmful effect on the health, it is essential, even obligatory in certain cases, to ventilate your lodging by installing a ventilation system (natural or mechanical) which renews the air thanks to the presence of ventilation grilles.

Why install air grilles?

The ventilation grids make it possible to renew the air inside of your home, thus meeting several objectives in terms of comfort of life and hygiene:

  • evacuate stale air by different pollutants (cooking grease, tobacco, VOC...)
  • fight against moisture to prevent the formation of harmful molds for health
  • avoid the stagnation of gases emitted by the different types of heating (gas water heater, insert, stove...)

A single ventilation grid, whether or not connected to a VMC (controlled mechanical ventilation) is not always enough, especially in well insulated homes like the BBC. In order for the air to circulate properly, several air ducts must be installed to create a draft to sanitize and dry the atmosphere.

Where to install ventilation grilles?

The air vents must be placed in the lower part when they bring in air, and at the top so that the stale air can come out, thus following the natural circulation of the air. They should also be installed if possible the opposite of doors to work properly and have the same air passage section. In the case of the use of gas appliances, such as a gas water heater or gas stove, their size will determine the volume of air to be treated, and therefore the size of the air grills to ask.
The kitchen, the bathroom and the toilets, very prone to moisture and condensation, are the parts to be treated in priority. Then follow the rooms and the main rooms where grilles, often made of aluminum, are installed above the windows.
Laying grids depends on the size, configuration, isolation of your home and the devices you use.

The different types of grids

White or colored polystyrene grid, metal grid (aluminum, painted or unpainted brass, in wood or decorative cast iron... There are grids for any type of room and use, and of variable size to suit all situations. They can be clipped or recessed, or even sealed or fixed. Some may also be equipped with mosquito nets or have a blackout slat system to regulate the amount of air entering.
To be sure to choose the right model, it is best to ask a professional. It will be able to identify what your ventilation needs are, and if necessary advise you on a complementary solution such as the VMC.

For a healthy home, do not forget to ventilate all the rooms and install a VMC system.


Video Instruction: Making furnace vent register covers