What Are Window Trickle Vents?

Trickle vents are background ventilators integrated into window frames and door frames to allow a 'trickle-feed' of constant airflow from the outside to an internal space.

The trickle vent is essentially a slit in the frame, staggered on the inside and outside, with a cover that can be opened and closed. Although the vent can be closed, they are designed to be left open all the time for continual ventilation.

Trickle vents are especially important in modern houses as homes are designed to be more airtight. A constant trickle feed of air helps to remove excess moisture buildup from the air that can cause mould.

Adding trickle vents to windows has always been a trade-off between ventilation and noise reduction. Sound is much more difficult to contain than light because a soundwave has a longer oscillation than a light wave and can diffract around corners to find its way through any small gaps such as trickle vents. Our new trickle vent is better designed to reduce any sound leakage for better noise reduction in your window.

Available finishes:

White and black finish as standard. Other colors available on request.

Operating instruction:

1. Cut the original gasket  in the dotted installation area on sash and frame.
2. Replace both gaskets with the provided 350mm ones. 
3. Screw in the 3 provided screws.

Principle of Operation

Fresh air from the outside, passing through the gap in the visor, enters the channel between the frame and sash at the place of removal of a fragment of a typical seal. Moving the flap knob ensures smooth air flow control.

The unit is provided with a complete fitting kit and instructions on how to enhance the gap between window and frame to achieve the air-flow necessary. The product works equally well on inward and outward opening windows.

Features & Benefits

Patented and registered design.

Can be fitted horizontally or vertically.

Fully gasketed for increased performance.

Various air opening sizes.

Unique linkages ensure constant friction and smooth action.

Special colors available on request.

Suitable for all UPVC window brands opening inwards, residential, public and industrial buildings.

When you choose Sunmay, not only do you make your home warmer and reduce your energy bills, but you also reduce your CO₂ emissions by consuming less energy to heat your home. We ensure an environmentally friendly manufacturing process.

FAQs

1. Do trickle vents stop condensation and damp?

Trickle vents provide background ventilation that contributes to reducing moisture in the air which causes condensation and mould. If a house produces excessive moisture then additional ventilation may be necessary to stop condensation.

2. Should trickle vents be open all the time?

Technically, a trickle vent can be manually opened or closed. However, trickle vents are designed to provide a constant background feed of air to reduce moisture and improve air quality. Building regulations state: "Background ventilators are intended to normally be left open."

In Winter, it might be necessary to close the trickle vent in cold weather. But it’s advisable to 'air' and ventilate the room every day to avoid a build-up of toxins and moisture.

3. Should all windows have trickle vents?

Trickle vents are required by Building Regulations when replacing windows that already have trickle vents fitted. For new window frames that are replacing old windows without vents, it must be demonstrated that ventilation will not be made worse by the installation of the new energy-efficient window.

In most cases, trickle vents are required to be fitted in new windows.

4. Where should trickle vents be fitted?

Trickle vents should be fitted at a minimum of 1.7m from the floor to avoid draughts. Vents are integrated into the head of the window frame.

Lead time: 10 to 30 days

OEM&ODM: Acceptable

Email:  sales@sunmayalu.com

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