Ventilation grille with pull-cord damper AWENTA T37 for Ø100–125 mm ducts

AWENTA T37 is a ventilation grille with a pull-cord operated damper designed for round ducts with diameters of 100–125 mm. Intended for integration into residential and light-commercial ventilation systems, the grille offers manual control of airflow and reliable shut-off when the damper is closed. The unit is suitable for exhaust or supply applications in bathrooms, kitchens and utility rooms and is made for straightforward installation and maintenance with standard circular ductwork.

Advantages

The grille provides a simple mechanical solution for controlling airflow without electricity: the pull-cord damper allows users to open or close the duct manually and regulate ventilation levels. Its round-duct compatibility (Ø100–125 mm) ensures direct connection to common ventilation piping, reducing the need for adaptors. The design supports easy access for cleaning and maintenance and is appropriate for both exhaust and supply roles in domestic environments.

Suitable for

• Exhaust ventilation in bathrooms and toilets
• Kitchen extraction and intermittent ventilation
• Ventilation of utility rooms, laundries and cellars
• Supply air connection where manual control or shut-off is required

When it may not be suitable

The grille is a manual device and does not include motorized or automatic control; it is therefore not suitable when automated dampers or integration with Building Management Systems is required. It is designed for round ducts within the 100–125 mm diameter range and is not appropriate for rectangular ducts or ductwork of significantly different sizes without proper adaptors.

Key specifications

• Compatibility with round duct diameters: 100–125 mm
• Manual pull-cord operated damper for open/close control
• Intended for use in exhaust or supply ventilation
• Suitable for domestic and light-commercial indoor rooms (bathroom, kitchen, utility)
• Designed for simple installation and maintenance with standard ductwork

How to use

Install the grille into the circular duct or connection point following standard ventilation mounting practices so the faceplate sits flush with the wall or ceiling as required. Use the pull cord to open or close the internal damper to adjust airflow: pull gently to move the damper to the open position and pull again or release to close, depending on cord design and end stop. Periodically inspect and clean the grille face and internal components to ensure unobstructed airflow and reliable operation.

What to consider before purchase

• Confirm the duct diameter at the installation point falls within 100–125 mm
• Decide whether manual control meets your ventilation needs versus automated solutions
• Check mounting location accessibility for cord operation and future maintenance
• Verify compatibility with existing duct material and any required adaptors

Usage recommendations

For consistent performance, ensure the grille is installed with the pull cord accessible and aligned to avoid snagging. Combine the grille with properly sized ducting and appropriate extraction fan capacity for balanced airflow. Clean the grille periodically to prevent dust build-up that can impede damper movement.