Ventilation diffuser

The diffuser is a vital component of the ventilation system, playing a crucial role in maintaining a healthy and comfortable indoor environment in residential, office, and industrial spaces. By ensuring efficient air distribution, the diffuser contributes to improved comfort and a well-regulated microclimate. In this article, we will explore the significance of diffusers and their essential function within the broader ventilation system.

What is a ventilation diffuser?

A diffuser is a sophisticated ventilation grille that also functions as a decorative feature. Its purpose is to allow the flow of air in and out of a room while effectively distributing and circulating the air throughout the space.

Place of installation for the diffuser

Diffusers are categorized based on their mounting type:

• wall-mounted;
• ceiling;
• floor.

Diffusers can be installed either indoors (indoor) or outdoors (outdoor).

Most apartments have ventilation ducts on the kitchen and bathroom walls. In these apartments, ventilation is designed to remove exhaust air from the living space. Grilles are typically installed in these ventilation ducts, and diffusers are not necessary.

The situation changes when a suspended ceiling is installed. In such cases, a diffuser is installed to effectively remove air from the room by connecting it to the duct.

When planning the installation of a supply and exhaust ventilation system in a residential or any other room, it is essential to include a product. The product is installed according to the project specifications. Commercial premises such as stores, gyms, beauty salons, cafes, banks, and others often require the installation of this component in their ventilation systems.

Purpose of the ventilation diffuser

The primary purpose of the element is to effectively distribute air masses throughout the room. What does this mean in practical terms? If the supply ventilation duct were to end in the room with an open hole, it would create numerous issues – drafts, stagnant air zones due to uneven ventilation. A diffuser is installed to evenly distribute the air and give it the desired direction.

Thanks to its design features, it is capable of regulating the amount of incoming air. Some variations of the design allow for adjusting the speed of air supply or exhaust. If necessary, the device allows for completely shutting off the air supply.

Being the final element of the ventilation system, diffusers also have an aesthetically pleasing appearance.

Diffusers vary based on their purpose:

• Supply. Installed on the air ducts that deliver fresh air to the room.
• Exhaust. Installed on the air ducts, removing the stale air from the room.
• Supply and exhaust. Considered a versatile option, as it can be installed on both the inflow and outflow of air.
• Combined. An advanced device with a decorative body featuring openings that serve both the supply and the extraction of air. These openings are connected to two separate ducts.

Types of ventilation diffusers

There is a variety of ventilation equipment available on the market – wall-mounted, ceiling-mounted, and floor-mounted devices. These devices are further classified based on other parameters as well.

Division by material

There are three types of housing materials available for purchase:

• Plastic case: This is the most common option and is known for its affordability and lightweight nature. Despite being made of plastic, these cases are just as durable and functional as their metal counterparts. They can also have a stylish, designer look.
• Metal case: This option utilizes various types of metal, such as aluminum, galvanized steel, or stainless steel. Metal cases are known for their strength and durability. However, they are not recommended for installation in air conditioning systems as metal tends to cool down quickly, leading to condensation issues.
• Wooden case: This type of case is primarily used in baths and saunas. Wooden cases can be customized to fit specific needs and preferences.

Differences in shape

The products are categorized based on the shape of their body:

• Round. They can have adjustable or non-adjustable properties and come in different diameters.
• Rectangular and square. These can also have airflow regulation functionality.

Distinguishing features by design

There are various models available that have different types of attachment and purpose, which also have specific design features.

• Slotted models: These models have a system where the incoming air passes through a series of slits in the unit. The number of slots can range from 1 to 6, and the slit heights can vary from 8 to 25 mm. Some models also have the ability to direct the airflow. These slotted models are typically mounted in suspended and multi-level ceilings.
• Jets models: This type of model shapes the air into one or more jets by passing it through itself. This design helps increase the speed and range of air delivery. Jets models can be either movable or stationary.
• Perforated models: These models are equipped with a large number of small-sized holes. The perforations in the design contribute to an even and balanced supply or discharge of air.
• Vortex. Renowned for its radial configuration of connectors. As air passes through them, it creates a swirling effect resembling a funnel. This unique design maximizes the airflow velocity and enhances the efficiency of air distribution. Vortex diffusers are commonly utilized in spaces that require rapid air exchange, such as bathrooms. To prevent the creation of unwanted drafts, it is recommended to incorporate a vortex diffuser with a static pressure chamber.
• Linear. Possesses an elongated structure featuring a limited number of slotted openings.

There are also other models that you can choose from.

Advantages and disadvantages of a diffuser for ventilation

There are several advantages associated with this device:

• Easy installation and operation;
• The ability to adjust and direct the supply of fresh air;
• This device prevents the formation of stagnant air zones;
• An attractive decorative appearance that will complement any modern interior.

One notable advantage of this device is its ability to effectively distribute air in large storage rooms.

Drawbacks:

• A draft can be formed in certain situations.

To address this issue, a static pressure chamber can be installed, which effectively eliminates the occurrence of drafts.

How to choose a diffuser for ventilation?

To choose the right product, there are several criteria that should be considered.

• Cross-sectional area. The product should be chosen according to the diameter of the air duct it will be connected to. The specifications of the product and the cross-sectional area of the duct should be compatible.
• Housing material. The product should be selected based on the room’s characteristics and the temperature of the air that will pass through it. Plastic products are recommended for air conditioning systems, while metal housings are preferable for outdoor ventilation systems.
• Housing design. There are numerous decorative options available for purchase. Choosing a product based on its design is a matter of personal taste and the desired style for the room.
• The necessary amount and velocity of air that enters the room.

Remember! The noise level generated by the device in residential areas must not go beyond 45-55 decibels.

Based on the specified criteria, you can select an option from the manufacturer’s catalog.

Ways of mounting the ventilation diffuser

There are three available options for connecting to the ventilation system:

• Connecting directly to flexible ventilation hoses or rigid ducting.
• Mounting to the ventilation system using a static pressure chamber, which is the preferred option. Installing the chamber requires a larger gap between the main ceiling and the decorative ceiling.
• Connecting to an existing ventilation duct located in the wall.

All items are sold with snap fasteners or bolts and self-tapping screws provided for easy installation. This component of the ventilation system needs to be installed in a properly sized hole that is prepared in advance.

Installation in a ventilation duct

To properly install the product in a rigid duct, it is important to follow a specific sequence.

1. Firstly, determine the parameters of the inlet hole in the duct. Based on the size of the box, select the appropriate diffuser.
2. Next, install the selected diffuser into the opening.
3. Finally, ensure that the device is securely fixed in the ventilation channel. Make sure that the locking latches function properly and snap into place.

Mounting in a corrugated or metal sleeve

A step-by-step guide on how to install a diffuser in a flexible ventilation hose:

1. First, pull out the end of the flexible corrugation from the ventilation duct.
2. Next, attach an air diffuser with the appropriate diameter to the inlet of the corrugation.
3. To install the device, start by inserting the hose into the duct, followed by the diffuser. Continue inserting until you hear a characteristic click. Ensure that the device fits snugly against the ceiling or wall, with no gaps.

Popular models of diffusers, their cost and manufacturers

The ventilation system component we are considering is not just a luxury. Prices for this component start at an average of 100 rubles for a diffuser with a diameter of up to 100 mm. If you prefer a similar version made of stainless steel, it will be more expensive, costing around 800 rubles. However, if you’re looking for the most expensive option, you should go for a square diffuser that measures 600 mm by 600 mm. This high-end option can reach a price of up to 2200 rubles per unit.

It’s important to note that the price of these components also varies depending on the manufacturer. The most affordable options are usually those produced by Russian companies such as Arktos, Airone, Era, and Vanvent. On the other hand, products from the Latvian brand Europlast and the Swedish company Systemair will typically be more expensive.