Modern people spend a lot of time indoors, because the ventilation system is so vital. After all, the conditions of staying at home, at work, at school, in kindergarten are gradually affecting their health.
The kitchen is the place where the air may contain odors, have moisture, smoke and other impurities in it. The bathroom and toilet will also accumulate damp and unpleasant atmosphere. Today, mankind has sealed its living quarters: installed plastic windows and quality doors that do not allow fresh air. Such an atmosphere in a home cannot bring anything good.
In modern housing, it is vital to have natural ventilation. It is ideal when a ventilation grille with a check valve is mounted 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 to exit the air from the room, but not to the inlet.
Exhaust grill with valve
The design of this device is quite simple. It consists of such details:
- grille for air intake;
- air outlet flange;
- valve.
The cross section of products is rectangular or round. The flange for attaching the air channel has a diameter of 110-150 mm.
The ceiling grill serves to protect the valve from being exposed to foreign objects. Another feature is decorative.
The valve opens only one way.
The most common material for the product is plastic, as often in places of operation there may be an increased percentage of humidity. Metal parts could succumb to corrosion. There are valves made of cast iron. They have a weight greater than plastic, and this helps them better close.
Benefits and principle of operation
Conventional ventilation grills allow air to flow in both directions. This can be a big minus when the yard is either very cold or hot. It is also possible that various unpleasant odors can sometimes be heard from the mine. And to add flies, mosquitoes, dust here - it doesn’t turn out well at all.
Advantages of a ventilation grill with a built-in valve:
- has protection against insects, dust, debris;
- reduces the noise level, as it is equipped with a special sound absorber;
- blocks access in the winter of cold, and in the summer of hot air;
- prevents odors from entering the room where it is being operated, from a mine or adjacent apartments.
The disadvantage of this device is that the petals sometimes freeze in the winter when it is frosty outside. Then ventilation does not fulfill its function. This minus can be neutralized by installing this design in the hood.
Types of valves
The valve is designed so that directs the air masses only towards the shaft, but not back. It is made in the form of a “butterfly”, square or round (in cross-sectional shape). On the axis of his petals are attached, it is they that close the inlet of the reverse thrust. You can install a "butterfly" in any position.
When the valve is made in the form of a square or circle, then the principle of their operation is the same as that of the “butterflies”.
The inertial grate can also serve as a valve; it is mounted externally. Blinds open only in a single direction. When the grill 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 also become possible.
For the heating method, the valves distinguish:
- with electric heating - in the winter they do not fail;
- without electric heating - used indoors.
In hoods where large drafts occur, an explosion-proof check valve is used.
Selection rules
To successfully select this type of device, you need to know some nuances:
- First, measure the parameters of the holes in the internal hood. This should be done so that later you do not have to exchange the purchased grid for another.
- Pay attention to the quality of the proposed product.
- It is better to purchase goods from a well-known manufacturer, as this will reduce the likelihood of buying a low-quality device.
- Ensure the safety of the materials making up the product.
Installation and operation
Before starting installation, be sure 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 will not work.
The product must have holes for its installation. First, the ventilation grill is mounted on self-tapping screws, and in order to better fix it, use foam. Gaps between the outer diameter of the product and the ventilation hole are foamed.
With a quality job, the air in the ventilated rooms will be freed from impurities, the atmosphere in the house will become healthier.
How to make effective ventilation?
With proper design, the exhaust hole when installing this type of climatic equipment should be on the ceiling or on top of the wall, at least 10 cm from it. Because warm air is discharged through it. In its place comes fresh and cold.
But in fact, in many rooms everything is different - the ventilation hole is made quite low. Warm light air cannot go lower to exit through the grill. 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 interferes with the efficient operation of the hood.
Often in private dwellings, in order to save money, they make one wentshacht for two rooms in the neighborhood. Because of this, air can move unhindered, and smells with it. It turns out that the exhausted air masses are not removed, but their rooms “move” into the room. This state of affairs is completely wrong, and in order to avoid such a situation, one should not save on the development of proper ventilation.
The fireplace also often causes an inefficient 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, which will work on its own. Unfortunately, builders neglect this. “In fashion” is now a forced ventilation system in the form of an exhaust “umbrella”. 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 non-return valve helps to establish a healthy microclimate in the house, and does not require large sums of money and highly skilled installation specialists to equip it. Recently, this climate technology is part of the modern ventilation of every home and even office. When it is made with high quality, it will give you fresh air and excellent well-being.
