All apartment kitchens are equipped with natural draft vents. When purchasing a kitchen hood, the owners usually build it in natural ventilation of the kitchen... This is a serious error, which we will discuss next.
Natural ventilation of the kitchen
The natural ventilation of apartment kitchens is calculated for a specific pressure, air flow rate, etc. Ventilation ducts in old buildings often poorly perform their function without additional loads. Under the most optimal temperature conditions, up to 180 cubic meters of air per hour is blown out by natural draft into the ventilation of the kitchen with a gas stove. A good hood can blow out up to 1000 cubic meters of air per hour. Such capacities are designed for individual ventilation ducts of private houses or wide ventilation shafts erected, for example, in American skyscrapers.
Cooker hoods are not analogous to ventilation in the kitchen! Their purpose is to remove steam and soot directly from the stove. It is important to understand that if the hood has pumped 1000 cubic meters of air out of the kitchen, another must necessarily come in its place.
He will come from an open window, toilet ventilation or cracks under the door to the staircase.
At the same time, connecting the hood to the ventilation duct interferes with natural ventilation in the kitchen.
How to choose and connect a hood
When purchasing a hood, you should not chase power.
Narrow ventilation ducts allow only as much air as they are designed to pass through (see above). You can change the situation by connecting the hood to a specially made hole in the outer wall of the house. But with such ventilation in a kitchen with a hood, it is important to provide for the possibility of a damper for the cold season.
Exhaust ventilation in the kitchen has nothing to do with a cooker hood. Disrupting the natural movement of air, the hood draws odors into the kitchen from other people's apartments or other rooms.
Kitchen exhaust ventilation
Exhaust ventilation in the kitchen is mounted from a system of ducts, to which, if desired, an extractor hood is connected. Before installation, engineers calculate the system and equip competent ventilation in the kitchen with an exhaust hood. It is especially important to properly equip the ventilation of kitchens with gas stoves.
Indeed, in addition to vapors and smells of food, when natural gas burns out, harmful impurities are released into the air of the room.
