Ventilation grille with a check valve: device and types of installation recommendations

Insulation and heating are essential for maintaining a comfortable and energy-efficient home. But ventilation is another crucial element that is sometimes disregarded. In addition to guaranteeing a constant supply of fresh air, properly ventilated homes also ward off problems like mold and musty odors. Today, we’ll examine the significance, construction, and installation of the ventilation grille—a crucial component of any ventilation system—with an emphasis on the check valve’s inclusion.

So, what precisely is a check valve-equipped ventilation grille? In a nutshell, it’s a compact but powerful gadget that controls airflow and stops backdrafts. Think of it as the gatekeeper of the airways in your house. A smooth opening of the check valve permits unobstructed air flow when it flows in the intended direction. However, the check valve quickly closes to stop unwelcome drafts if there’s a sudden change in airflow, like when a wind gust tries to force air back into the house.

Let’s now discuss the different kinds of ventilation grilles with check valves and how they should be installed. A variety of designs are available, from basic residential models to more intricate ones appropriate for commercial structures. Aesthetic preferences, intended airflow, and space dimensions all play a role in the decision. Certain grilles have movable louvers that let homeowners adjust the airflow’s direction and force.

To ensure maximum performance during installation, accuracy is essential. The efficiency of air circulation throughout the house is largely dependent on the location of the ventilation grille. Grilles should ideally be positioned thoughtfully in places where moisture can accumulate, like laundry rooms, bathrooms, and kitchens. To avoid air leaks and maximize efficiency, it’s also critical to adhere to manufacturer guidelines regarding spacing, angle, and sealing.

You can improve indoor air quality and energy efficiency in your home by adding a ventilation grille with a check valve to your HVAC system. These modest but important gadgets can significantly improve your home’s comfort and well-being with the right installation and upkeep. Thus, take into account the advantages of making an investment in high-quality ventilation solutions whether you’re renovating an old house or building a new one.

Types of constructive solutions of check valves

The ventilation system four’s primary means of preventing reverse traction. Every option has advantages and disadvantages, and the selection of a particular option is contingent upon certain circumstances:

Single -barreled gravitational valve

The working principle relies on the application of gravity; when there is no traction leaving the room, gravity pulls the sash closed. There are two ways to execute it for a horizontal or vertical installation: either the counterweight inside the device (or outside the device) or the displacement of the sash’s axis with respect to the duct channel center causes the opening.

Double -barrel valve using springs

It is also called a “butterfly” due to the similarity of the petals of the shutters with wings that develop at excess air pressure and spreading in the absence of traction. Does not depend on gravity and is placed in the ventilation system at any angle. Through tension and weakening of the springs, the sensitivity of the valve to pressure drops is regulated. Most of the butterfly valves in ventilation systems with forced exhaust are installed.

Blinds on the ventilation grill

The device, which is installed outside the system and resembles a grate covering the duct from the street, operates on the basis of gravity. Both the size of the air duct’s closed opening and the grill as a whole have valve options. Natural ventilation is appropriate because of the petals’ small size and mass.

Flexible membrane

Because of the design’s high sensitivity to air current, forced and natural ventilation both use it. When air flows in one direction, the membrane bends, allowing air to flow freely; when air flows in a different direction, the membrane changes, and the air duct extends and shuts.

How to make effective ventilation

When installing this kind of climate equipment, the exhaust hole should be properly designed and placed at least 10 cm away from the wall or ceiling. due to the warm air that is expelled through it. cold and fresh.

However, in many rooms, the ventilation hole is made low enough, so everything is actually different. Warm, light air cannot pass through the grille by descending. Thus, the area of stagnation above the hood is formed.

The ventilation system’s design is flawed, and the pipes are installed at a lower height than necessary. Because of the small pressure difference, the hood cannot function effectively.

A common practice in private homes is to combine two nearby rooms into one ventilation system in order to save energy. This allows smells to travel freely with the air. It turns out that the spent air masses "go" into the room rather than being removed from its premises. This is an entirely incorrect situation, and the development of proper ventilation should not be stopped in order to prevent it.

Another common cause of the vent system’s inefficiency is the fireplace. The quantity of кислорода also decreases when топливо сгорает, and воздуха идёт выкачка из вытяжки.

Installing a check valve on a ceiling lattice can help create a healthy microclimate within the house without breaking the bank or requiring highly skilled installers. These days, every home and even office has modern ventilation that includes this climate technique. It will provide you with excellent well-being and fresh air when it is made efficiently.

Ensuring adequate ventilation is crucial for maintaining air quality and preventing moisture buildup when it comes to heating and insulating your home. The ventilation grille with a check valve is an essential part of a properly ventilated house. This device keeps your living areas fresh and healthy by allowing air to enter and exit your home while blocking backflow. To maximize the device’s effectiveness, it is essential to comprehend its construction and perform an accurate installation. Through adherence to suggested installation protocols, such as strategically placing the grille to maximize airflow and guaranteeing a tight fit, homeowners can augment their residence’s ventilation system, thereby augmenting overall comfort and energy efficiency.

Types of ventilation grilles

The way ventilation grilles are made varies. Usually, this is metal or plastic.

One of the drawbacks is that they are sensitive to high temperatures, which means they shouldn’t be used in industrial settings or in kitchens with intense heat. Installing the plastic grill indoors is appropriate.

Due to their higher cost, weight, and susceptibility to corrosion, metal products are also more dependable in their design and are resistant to heat. utilized in catering kitchens and industrial facilities.

Ventilation grilles come in three different shapes: round, square, and rectangular. Their sizes match those of air ducts and typical ventilation holes.

Variations in format have no bearing on output; the fundamentals of labor remain unchanged. Choose the product according to the duct’s specifications.

Varieties of valves

The locking element type and manufacturing material of the lattices vary.

Examine four primary types of valves:

  • single -winged;
  • double -leaf spring;
  • membrane;
  • Lyluzine-swallow.

Single -leaf

Composed of polymer. Due to gravity, the sash that is rotating around the axis becomes vertical and blocks air flow.

This is accomplished by shifting the rotation axis or mounting a counterweight on one of the sash’s sides. appropriate for the room’s natural ventilation.

Installation in a strictly vertical or horizontal position is a necessary requirement for use. The damper won’t close all the way if you set it out of level.

Double -barrels with springs

Two curtains make up the butterfly-shaped locking element, which closes when air flows from the undesirable side. Springs force the plate to straighten out in the absence of pressure.

The flexibility to select any installation angle is the benefit.

Plastic or thin metal sheet can be used as the manufacturing material.

When utilized in forced air exchange systems, natural air pressure is insufficient to fully open the curtains. Certain models come with spring exposure force regulators.


Because the membrane shifts position with a weak stream, membrane valves are used in systems without forced ventilation. However, this characteristic has a flip side.

Strong pressure inside the membrane’s pipe can cause it to distort and lose its properties. Additionally installed are the stiffness ribs to prevent curvature.

These valves shouldn’t be installed on a vehicle with strong reverse traction or a powerful hood.

The majority of hoods installed in apartment building kitchens are compatible with the most widely used valves.


Blind-style air valves are commonly utilized. The petals hang upright in the absence of air pressure in the pipeline, closing the channel from reverse traction. This is how the gravitational principle of work operates.

Standard sizes are used to make lattices. Smaller sashes are simpler to open for outgoing air flow and to close with reverse traction than single-leaf options.

Typically, these petal models are utilized at the street-side output of ventilation systems. The metal plates that make up the blind system have a higher resistance to temperature fluctuations.

The heavier weight in comparison to plastic and the possibility of corrosion over time when the coating is removed are the drawbacks.

Not in use without exhaust devices!

Ventilation grille for the kitchen installation and dismantling

Let’s take a closer look at how to do it yourself: installing a ventilation grate in the kitchen. The mine entrance and air supply dimensions are taken into consideration when choosing the product model.

Screws are a dependable and easy way to fasten walls composed of wood, concrete, brick, and drywall.

The installation process is completed in the following order:

  • The model is applied to the entrance to the hood;
  • we plan the existing fastening holes;
  • in the absence of fasteners, we drill them ourselves;
  • We drive dowels in them;
  • Install the lattice using self -tapping screws.

We use drills and the appropriate drill for wood and drywall. Using a drill from the winnet, a perforator is used to drill holes in brick or concrete. Ceramic tiles require specialized drills.

The glue installation is easier to use but less dependable. Foamy adhesives, liquid nails, titanium, Budamex, and dragon all produce good results. On the back of the grate or along the desired contour surrounding the hole, apply the glue evenly. Install the product gently and secure it with mounting tape. Holding the glue in place, take off the tape.

When cleaning becomes necessary, the question of how to quickly and easily remove the kitchen ventilation grill comes up. Simply unscrew them to release the self-tapping fastening.

7 installation and operation

We’ll examine the suggestions required for the Reshent installations.

  1. 1. Pre -testing the valve, for possible jamming.
  2. 2. The product itself must contain prepared holes. Lattices are fixed using self -tapping screws.
  3. 3. For better fixation and sealing, we use mounting foam. It is poured into a gap between the grille and the ventilation duct.
  4. 4. The dimensions of the product must correspond to the shape of the ventilation duct.
  5. 5. If there is a need for an alternate action of natural ventilation and a forced device, you need to use the lattice of a certain design with two slots. Both gaps serve for different types of ventilation.
  6. 6. It will not be superfluous to strengthen the wall near the hole immediately before installation.

Now focus on the operation. Every time air is extracted from a kitchen, moisture is present.

This may result in ice forming on the street lattice during cold weather. The air movement stops as a result of this process. The hole just gets smaller and/or gets sealed up tight with ice. The hood’s load has been greatly increased.

Periodic inspection of the outer grate is the best course of action. You cannot wait for warming and measurement; the ice needs to be removed. A mechanical technique is used to remove the ice, aided by a variety of tools that will melt it. There’s another issue. Plastic grilles can sustain damage from shocks. Thus, metals are the only source of the outer lattice.

Picture 3. Sitema for ventilation.

Purchasing and installing check-up gratings will assist in resolving the clean air problem. A cheap product can greatly increase comfort and stop negative states from happening.

Varieties of valves

The valve is designed to only direct air masses in the direction of the mine—not the other way around. It is made in the shape of a section, square, or round, like a "butterfly." The petals seal the opening to the reverse rod and are connected to the axis. A "butterfly" can be installed in any orientation.

The principle of operation for valves that are shaped like squares or circles is the same as that of "butterflies."

The externally mounted inertial lattice can also function as a valve. Blinds open in a single orientation. They are closed when the grate is turned off.

In the event that the check valve is missing, condensation will build up on the product and in the exhaust shaft, potentially leading to drafts.

The valves are identified based on the heating method:

  • with electric heating – in winter do not fail;
  • without electric heating – used in rooms.

Large drafts in hoods require the use of explosion-proof models.

Advantages and disadvantages

Numerous indisputable benefits of road valve bars contribute to their high popularity and steady consumer demand.

  • The valve does not allow closing the thrust and prevents the penetration of air masses from neighboring rooms or from the street.
  • A high noise -absorbing effect reliably protects the room from extraneous sounds coming from neighboring rooms and a street rumble.
  • The modern aesthetic appearance of decorative gratings allows you to place devices in rooms of any purpose without risk to clutter up the interior.
  • Simple installation and undemanding in constant care make lattices one of the most practical devices of this purpose.
  • Devices are produced in a wide range with a wide variety of sizes, colors and design. This greatly facilitates the choice of the right model and allows you to purchase a grate for any interior.
  • The low cost of products makes them even more accessible and popular.

The possibility of fringing the shutters during the winter and the generally low performance of the devices are among their drawbacks. Installing the built-in heater, however, is a simple solution to the device freezing issue.


There are several indicators that identify ventilation grilles with a check valve, the primary one being the kind of locking mechanism. This criterion separates the models into membrane, bivalve spring, blind-petal, and single-barrel gravitational categories.

Single -barrel gravitational models have a simple design consisting of a circular or rectangular locking element, which is eccentric on the axis. The work sash opens as a result of pressure from the room’s air flow. The principle of work of devices of this type is based on the use of the gravity of the sash for its closure, which makes the models simple and reliable, and also allows them to be used in systems with natural circulation of air masses. This is because the sash can be opened quickly even with a small stream of water thanks to its slight resistance.

The basic component of single-barrel gravitational models is an eccentric locking element that can be either round or rectangular in shape. The first scenario involves a slight shift in the sash fastening axis with respect to the air duct center, while the second scenario involves a counterweight that can be situated both inside and outside the device. Devices of this kind operate on the basis of the sash’s gravity being used to close it; this feature makes the models dependable and easy to use, and it also permits their application in systems where air masses naturally circulate. It is preferable to use the building level during installation. If not, the sash won’t close all the way and won’t be able to reliably shield the interior space from the outside air.

The most popular kind of grilles are membrane devices, which are models in which the membrane acts as a damper. Membrane shutter-equipped valves readily open in response to even a small increase in air pressure. Membrane models are improved by the resilience of stiffness, which serves as the foundation for the membrane septum in the event of excessive thrust, as the air jet pressure in the system is likely to increase. Without further reinforcement, the membrane may deform, at which point the valve will start to contaminate the incoming air.

The petal models differ in having a long service life, small size, and excellent locking effect, while still resembling the structure of the blinds. These devices work on their own gravity, which is similar to the principle of operation of gravitational grilles. The blinds’ dimensions match those of the external air ducts, and they are made to be installed in the vendes’ exterior sections.

The Babel valve operates on two valves. The spring further fixes the sash and allows it to fold quickly. These models can be installed in any position, but they cost a little more than other devices. Only forced airflow ventilation systems allow spring models to operate; they cannot be installed in networks with natural thrust.

The manufacturing material is the next indicator used to categorize the models. Plastic is the most widely used raw material when making lattices with a check valve. This material’s small weight, high corrosion stability, long service life, and low cost are characteristics of devices made of it. Grilles are made from plastic and galvanized steel, among other materials.

Due to their extreme heat resistance, metal models can be placed outside of buildings, in catering businesses’ cuisines, and in hot industrial production workshops. The high weight and susceptibility of galvanized products to corrosion processes are their drawbacks. As a result, plastic-made products are more widely used and in demand than metal devices.

Device and principle of operation

The front decorative panel, a fixed flange, a damper, and a protective case make up the forth valve ventilation grill. The forced circulation of air masses moving under a specific pressure allows the valve damper to open. The grill and duct are connected by means of a flange, which comes in various sizes and is fully compatible with all kinds of ducts. Plastic is mostly used in the production of gratings with check valves because metal components should not be used when the device is operating in highly humid environments.

The check valve works on this principle: exhaust air masses exit the room through the decorative lining, pass through the valve at a specific pressure, and lift the damper. The valve closes and serves as a dependable barrier for bugs, street dust, and an unpleasant smell when the air flow decreases. Models are frequently placed in the bathrooms and kitchens next to comparable spaces in nearby apartments.

Installation and operation

Circuit for ventilation featuring a check valve

It is crucial to position a ventilation grill with a valve correctly in order to prevent reverse traction when exhaust devices are included in any combination. One grill should suffice if one hood is functional.

It is advised to install a grate with a valve on each pipeline branch connected to the air removal mechanism in more intricate systems. This will stop air from reentering the space after the hood is turned off.

You can install the grate with your own hands and no special skills needed. The location is chosen according to installation convenience and availability, t. To. You will need to periodically clean the grate while it is in use.

Apartment building ventilation mines are breeding grounds for a variety of microorganisms; a lot of dirt collects there, and rodents and insects can also reside there.

Utility cleaning services are either very uncommon or never occur. As a result, the device that prevents the reverse flow of air must be installed at the mine’s entrance.

Certain hood models come pre-installed with a check valve; in these instances, installing an additional device is not necessary.

Installing other components of the air exchange system is comparable to the process of connecting the lattice. Certain models allow you to mount the product inside the mine, while others can be mounted on the wall.

The main stages of installation

What makes a check valve work?

  • Connect the product to the duct by means of the connecting flange.
  • Miss the gap between the wall and the air duct with a sealant or fill with mounting foam – you need to ensure the complete tightness of the structure.
  • Cut the excess foam or sealant after drying with a knife.
  • Fix the case of the product on the load -bearing surface using self -tapping screws and dowels or liquid nails.
  • Install a decorative lattice in place.

Certain models come with an extra fan; install the fan before attaching the decorative element.

When forced and natural ventilation are operating simultaneously, two methods are employed:

  1. Installation of a tee near a grate with a valve for natural ventilation. When using the tee, access to the product for preventive work is simplified;
  2. Buying a special model with holes for both types of ventilation.

Freezing the closing element can be a problem when installing a check valve from the side of the road. Because moisture quickly freezes, the ducts that come from the bathroom and bathroom are particularly vulnerable to this.

In this instance, ventilation performance is decreased along with the hole’s cross section. Moreover, the sash can no longer be rotated freely.

For these reasons, you must periodically use a mechanical method to remove the ice while exercising caution to avoid damaging the plastic grid case. For street use, it is better to use metal products.

A quick and simple way to determine whether reverse traction is present is as follows: Put a lit match up to the ventilation hole; if the flame strays to the side that is opposite the hood, the ventilation requires a check valve-equipped lattice.

Rules for the placement and installation of a ventilation grille with a valve

The basic rule is that the system should be installed so that the hoods in the back of the reverse traction are absent when the fans are turned on or off.

Installing a single valve will be sufficient if the system has a single point of intake for air that is connected to the street via a duct. When dealing with a more intricate topology, ventilation adheres to the subsequent guidelines:

  • At each point of air fence is placed on the valve to avoid reverse traction in this place.
  • Another valve is placed at the place of the duct"s exit on the street, for prevention – in return traction without it will not be with complete tightness of the duct.

Install check valves with adequate clearance for easy access and maintenance; clear away debris and fat to prevent seizing.

Make sure the manufacturer did not install the device in the air duct before installing the valve, if applicable, as this eliminates the need for its installation.

Birds, rats, and insects reside in the ventilation tunnels of apartment buildings, in addition to unwanted odors from nearby apartments. Since the byproducts of their essential activity are not distinguished by a unique sanitation, forced ventilation must be used in these systems. It is best to prevent air from the duct from returning to the room. It is not worthwhile to rely on management companies’ diligence in carrying out treatment work.

Device Types of Installation Recommendations
A ventilation grille with a check valve allows air to flow into a room while preventing backdrafts. Install the grille in areas where ventilation is needed, such as bathrooms or kitchens. Make sure it"s positioned correctly to allow airflow and prevent obstructions.

Maintaining a healthy indoor environment in our homes requires adequate ventilation. A key component of this process is the use of ventilation grilles with check valves, which let in fresh air while keeping out drafts and outside elements from entering our homes.

For homeowners who want to maximize their home’s insulation and heating systems, it is crucial to comprehend the device and its various installation options. Depending on the layout and style of the home, each installation method—whether it’s a wall-mounted grille or a ceiling-mounted option—offers special advantages and considerations.

It’s critical to consider aspects like airflow direction, positioning, and compatibility with existing ventilation systems when installing a ventilation grille with a check valve. In addition to ensuring effective air circulation, proper installation reduces energy loss and aids in maintaining year-round indoor temperatures.

Expert advice or manufacturer guidelines can offer important information about the best kind of ventilation grille for particular requirements and tastes. It is also advised to perform routine maintenance and inspections on these grilles in order to guarantee maximum performance and extend their lifespan.

To sum up, check valve-equipped ventilation grilles are a practical way to improve indoor air quality and keep comfortable living spaces. A healthier and more energy-efficient home can be created by homeowners taking proactive measures to understand their devices, types, and installation recommendations.

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