Modern people spend a lot of time indoors, which is why the ventilation system is so vital. After all, the conditions of staying at home, at work, at school, in kindergarten gradually affect their health.
The kitchen is the place where the air can contain odors, moisture, smoke and other contaminants. Dampness and an unpleasant atmosphere will also build up in the bathroom and toilet. Today mankind has sealed its living quarters: installed plastic windows and high-quality doors that do not let in fresh air. Such an atmosphere in the house can do nothing good.
Natural ventilation is vital in modern housing. Ideal when a ventilation grill with a non-return valve is installed for this. This option is a good solution to the problem of air purification. Its value lies in the fact that the valve works only for the air outlet from the room, but not for the inlet.
Exhaust grille device with valve
- air intake grill;
- air outlet flange;
- valve.
The cross-section of products can be rectangular or round. The flange for attaching the air duct has a diameter of 110-150 mm.
The ceiling grille is used to protect the valve from the effects of foreign objects on it. Another function is decorative.
The valve opens in one direction only.
The most common material for the product is plastic, since often there can be an increased percentage of humidity in the places of use. Metal parts could corrode. There are valves made of cast iron. They are heavier than plastic ones, and this helps them to close better.
Benefits and working principle
Conventional ventilation grilles allow air to pass in both directions. This can be a big disadvantage when it is very cold or hot outside. It is also possible that various unpleasant odors will sometimes be heard from the mine. And to add here flies, mosquitoes, dust - and it does not turn out well at all.
Advantages of a ventilation grill with a built-in valve:
- has protection from insects, dust, debris;
- reduces the noise level, as it is equipped with a special noise absorber;
- blocks access to cold air in winter and hot air in summer;
- prevents odors from entering the room where it is operated, from the mine or nearby apartments.
The disadvantage of the device is that the petals sometimes freeze in winter when it's freezing outside. Then the ventilation does not fulfill its function. This disadvantage can be neutralized by installing this structure in the area of the hood.
Varieties of valves
The valve is designed in such a way that it directs air masses only towards the shaft, but not back. It is made in the form of a "butterfly", square or round (in the shape of the section). Petals are attached to the axis, they close the entrance to the reverse thrust. The butterfly can be installed in any position.
When the valve is made in the form of a square or a circle, then the principle of their operation is the same as that of "butterflies".
The inertial grille can also serve as a valve, it is mounted externally. The blinds only open in one direction. When the grille is off, they are closed.
If there is no check valve, condensation will occur on the product and in the exhaust shaft itself, and drafts will become possible.
According to the heating method, the valves are distinguished:
- electrically heated - do not fail in winter;
- without electric heating - used indoors.
In hoods where large drafts occur, an explosion-proof type check valve is used.
Selection rules
To successfully choose this type of device, you need to know some of the nuances:
- First, measure the parameters of the hole in the inner hood. This should be done so that later you do not have to exchange the purchased lattice for another.
- Pay attention to the quality of the offered product.
- It is better to purchase a product from a well-known manufacturer, as this will reduce the likelihood of buying a low-quality device.
- Ensure the safety of the materials that make up the product.
Installation and operation
Before starting installation, it is imperative to check the position of the valve so that it does not accidentally jam. If you do not do this, but install a ventilation grill of this type, then such a problem may arise, and it will be difficult to eliminate it. Then the device simply won't work.
The product must have holes for its installation. First, the ventilation grill is fixed on self-tapping screws, and to better fix it, use foam. Foam the gaps between the outer diameter of the product and the ventilation hole.
With high-quality work, the air in ventilated rooms will be freed from impurities, the atmosphere in the house will become healthier.
How to make effective ventilation?
But in fact, in many rooms everything is different - the ventilation hole is made low enough. Warm, light air cannot go lower to escape through the grate. This creates a stagnation zone located above the hood.
There is a mistake in the design of ventilation, and the fact that the pipes are mounted at a lower height than they should. The pressure difference is minimal and this hinders the efficient operation of the hood.
Often in private dwellings, in order to save money, one ventilation mine is made for two rooms next door. Because of this, air can move unhindered, and odors with it. It turns out that the spent air masses are not removed, but "move" from their premises to the premises. This state of affairs is completely wrong, and in order to avoid such a situation, one should not save on the development of correct ventilation.
The fireplace is also often the reason for the ineffective operation of the ventilation system. When the fuel burns out, the amount of oxygen also decreases, and air is pumped out of the hood.
In the kitchen, you just need to install ventilation that will work by itself. Unfortunately, builders neglect this. A forced ventilation system in the form of an exhaust “umbrella” is now in vogue. It works with the help of electricity, and when it is absent, then there is no ventilation, and air stagnation is obtained.
A ceiling grille with a built-in check valve helps to establish a healthy microclimate in the house, and does not require large funds and highly qualified installation specialists to equip it. Recently, this climatic technology has become a component of modern ventilation in every home and even office. When done well, it will give you fresh air and great well-being.
