What are ventilation grilles and what is their function in a ventilation system?

Ventilation grilles are terminal elements of a ventilation system through which air is supplied to or extracted from a room. Steel grilles shape the air jet leaving the duct or plenum box and protect the opening and ductwork from mechanical damage and larger particles.

How do these simple grilles differ from adjustable grilles and diffusers?

These grilles have fixed blades and are not intended for manual adjustment by the user. Airflow distribution is achieved by selecting the correct grille size, pattern and, if needed, using a damper or plenum box with adjustment behind the grille. Adjustable grilles and diffusers allow you to change the direction of the air stream, but they are more complex and more expensive.

Can these grilles be used to regulate the amount of air in a room?

Not directly. The air volume is regulated at system level using airflow regulators, balancing dampers or adjustable plenums in the ductwork. The grille itself mainly provides air distribution and a neat finish to the opening, rather than being a manual control device.

Where are steel ventilation grilles of this type typically used?

They are commonly used in offices and administrative buildings, warehouses, production halls, corridors and technical rooms. Simple steel grilles are well suited for industrial and semi-industrial environments where robustness, durability and straightforward appearance are important.

What are the typical differences between models such as CCH, CCV, PCR, etc.?

Depending on the manufacturer, models differ in blade profile and spacing, free area percentage, frame depth and mounting options (into a wall, ceiling or plenum box). Some grilles are better suited for horizontal ceiling supply, while others are optimised for extract or neutral air distribution.

Can the same grille be used for both supply and extract air?

In many cases yes. Most steel ventilation grilles are designed to work in both supply and extract applications, provided that airflow and noise limits are respected. The final choice should follow the manufacturer’s recommendations and the designer’s calculations.

How is the correct grille size selected for a project?

The size is chosen based on the design airflow, acceptable air velocity through the free area and the connection size of the duct or plenum box. Designers or equipment suppliers usually help select the appropriate type and size to achieve the required airflow with low noise.

How are steel ventilation grilles installed?

Grilles are mounted into wall or ceiling openings, or onto plenum boxes, using frames, hidden fixings or visible screws depending on the model. It is important to ensure tight contact with the surface and to keep access for cleaning and for any damper or balancing device located behind the grille.

Do these grilles require regular maintenance?

The main maintenance task is periodic cleaning from dust and dirt. When necessary, the grille can be removed, cleaned and reinstalled. Regular cleaning preserves the free area, maintains design airflow and helps reduce noise caused by contamination.

What factors affect the price of ventilation grilles and which regions do you supply?

Price depends on grille size, profile type, coating (e.g. powder-coated or galvanised), additional accessories such as mounting frames or plenums, and order quantity. Steel ventilation grilles can be supplied to projects in Estonia and, where required, also to Latvia and Lithuania as part of complete ventilation equipment deliveries.

Ventilation Grilles – Buy I EU-wide Delivery

When selecting ventilation grilles for air flow regulation, it is important to consider the type of room, the ventilation concept, the design air volume and acoustic requirements. A well-chosen grille ensures comfortable indoor conditions without draughts or excessive noise while fitting the interior design of the building.

What we consider when selecting:

Room function and usage — offices, warehouses, production areas, corridors and waiting zones require different air distribution strategies.
Air volume and duct cross-section — these parameters define the size, type and number of ventilation grilles needed in each zone.
Required air flow direction — single- or double-row blade configurations are selected with options for vertical and horizontal adjustment.
Acoustic and noise limits — where strict noise criteria apply, grilles with smoother aerodynamics are chosen and air velocities are optimised.
Mounting method and design — concealed or surface-mounted installation, frame shape and colour are adapted to ceiling, wall and duct details.
Serviceability and access — we plan for convenient access to filters, dampers and service openings located behind the grille.

Ventilation grilles

Ventilation grilles for air flow regulation

Key benefits of ventilation grilles for air flow regulation in buildings

How ventilation grilles for air flow regulation work in a ventilation system

How to select ventilation grilles for air flow regulation for your project

Frequently asked questions about ventilation grilles