PAS2030: 2019 Compliant Window Trickle Vent

Effective and inexpensive solution of stuffiness, humidity, fogging and mould indoors with Air-Box® An effective and inexpensive means of achieving trickle vent ventilation in ECO. Fully tested.

The Airbox Window Trickle Vent has been tested to BS EN 13141-1 and is therefore in accordance with PASS2030: 2019 and Building Regulations Part F. If fitted according to the instructions provided, this trickle vent product is a fully compliant product as tested by BRE.

*Updated videos are being created now and will be uploaded shortly. For now, please rely on the printed information instructions which form part of the product kit.

Air-Box® Model

Airbox Comfort

The Comfort series ventilation valve is used for the organization of air exchange in accordance with the requirements specified in Building Regulations Approved Document Part F as requested by PAS2030: 2019 and PAS2035. The product has been tested to numerous European standards and guidelines including DIN EN 1946-6, DIN EN 18017-3, EnEV 2009 and 2014. It has been tested by BRE in the UK according to the requirements of BS EN 13141-1.

A special feature of the Air-Box Comfort valve is the ability to quickly install without milling or drilling a window profile. When fitted according to the information provided on installing, the product achieves the necessary airflow without damage to the window.

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.

Price of Units

Quantity Air-Box Comfort Price
1-99 £12.49 +VAT

For exclusive prices for ECO installers on orders of 100 units or more, please contact us. Orders can be placed for next day delivery.

Easy Installation

*Updated videos are being created now and will be uploaded shortly. For now, please rely on the printed information instructions which form part of the product kit.

Problems of modern airtight windows

When the windows are closed

The operation of natural ventilation stops

Closed windows lead to an increase in the amount of carbon dioxide CO2. The main signs of hypoxia are: headache, cough, inflammation of the mucous membranes, exacerbation of allergies, apathy, rapid irritability, depression, insomnia.
Condensation on windows – this is the first sign of deterioration of the home microclimate; increased humidity promotes the spread of fungi, bacteria and mold. The cause is hidden in poor ventilation.
Mold and fungi are dangerous to health. Fungal spores lead to allergic cough, bronchitis, headaches, nausea and other unpleasant sensations.

When the windows are closed

Windows lose their basic functions

Open windows allow the wind to take warm air with you. It can lead to colds, angina, various respiratory diseases, inflammation of the spinal cord, inflammation of the muscles, inflammation of the ears, inflammation of the kidneys.
Ventilation is always associated with heat loss that escapes from the room due to open windows. Heat loss is tens of times faster through open windows.

One of the main stressors is noise. Open windows completely transmit city noise and sounds, especially at night, when the external noise is very annoying.

The Air-Box® air valve solves these problems

Normalised and controlled indoor air exchange

Fresh air reduces the occurrence of allergic reactions and other diseases. From a medical point of view, the Air-Box ® system is ideal for young children, the elderly, people with allergies and asthma.
Where it is easy to breathe, everyone will feel alert, active, healthy and happy. By getting rid of stuffy air and drafts, a person creates a favorable microclimate and comfortable conditions for living and working in their home or office. Air-Box ® inlet valves allow to regulate the air supply when the window is closed, while maintaining all the advantages of airtight windows.

Ventilation valves Air-Box ® reduce heat loss. This state-of-the-art ventilation method fully meets the new energy efficiency standards for European buildings and thus makes a significant contribution to saving your home’s energy and economy as a whole.

Compliance with Approved Document: Part F/PAS2030: 2019

The product has been tested to BS EN 13141-1 with BRE. A copy of the report reference is available upon request. This means that the product, when fitted in accordance with the instructions provided, is compliant with PAS2030: 2019 and the requirements of Building Regulations: Approved Document Part F.

The performance of the air permeability is a consequence of the gap created when fitted. This is made clear in the instructions.


Air-Box Comfort Options
Colours White | Brown | Anthracite
Materials ABS/PVC All fittings and instructions provided
Installation (without milling or drilling) Suitable for all PVC window brands INCLUDING both inward & outward opening windows
Additional Information All kits come with sticker kit to demonstrate the units are compliant with PAS2030: 2019 and Part F
Technical Support Full Technical Support provided by PAS Safe Solutions on how to achieve fit and required air permeability


Any form of increasing airtightness in the home, for example, by installing insulation increases the chance of natural ventilation not happening at the correct levels to properly ‘air’ the room in question. This can lead to the unwanted build-up of moisture, bad air and unwanted contaminants.

This is such a serious issue that various quality standards like PAS2030: 2019 (the current standard which applies to retrofit of insulation) and Building Regulations Approved Document Part F (the document which controls the issue of ventilation within the building envelope) state that ventilation must achieve 2,500mm2 in every room with a property which has received any form of air-tightness measure.

Not doing so is a breach of the standards and increases the risk of fungal build up which is not only un-healthy but which can also start to erode the interior décor as a consequence.

This form of ventilation, whilst acceptable, increases the ‘draught’ effect which you’d expect from putting holes in the window. It also increases the noise effect. The Airbox ventilation vent achieves the ventilation effect whilst having the ability to work with the window to decrease draughtiness and noise.

Some windows have a secure ability to leave the windows partially open which achieves the desired effect of creating a decent level of ventilation. In warmer months this is useful. However, many windows don’t have this functionality which is where the Airbox comes into its own. The window can provide a steady stream of airflow without compromising on safety or security.

EU regulations recommend airing the room up to 4 times a day for 15-30 minutes, which is often impossible or extremely inconvenient. In rooms with gas stoves, the absence of oxygen is especially dangerous, since this increases the likelihood of build up of dangerous gases. Whether you choose Airbox or not, if the property is becoming more air-tight we strongly recommend ventilation of one form or another is installed.

With the heating on, no it shouldn’t get any colder. The unit has the ability to adjust the air supply so if it is very cold and you wish to decrease any perceived draught, simple close the in-built valve and any cold air entering the room will decrease.

Most air conditioners won’t provide you with fresh air. Their work is based on the fact that air is re-circulated through a filter and cooled or heated as part of that process. This won’t provide the necessary fresh air to make a room healthy. Simply contrast how you feel after a day in an air conditioned building compared with time spent outside in fresh air.

During normal operation the valve shouldn’t freeze because of the air being moved often from a warmer inside room to the outside. However, when it’s very cold we don’t recommend you leave the Airbox closed for long periods of time which will disrupt the air movement which ensures ice cannot build up.

There are cheaper trickle vents on the market. However all require drilling or routing which takes considerable time compared with literally minutes to install the Airbox. Couple that with the potential damage to windows from drilling etc and we believe that it’s safer than the cost of replacing expensive windows. We’ve also found that customers prefer the Airbox because it doesn’t do any damage to the windows.

PAS Safe Solutions have in-house highly qualified ventilation experts which include Retrofit Coordinators. Our experts say they are fully compliant if fitted as instructed.

The product has been tested by BRE to BS EN 13141-1 which is the only requirement provide the necessary fresh air to make a room healthy. Simply contrast how you feel after a day in an air conditioned building compared with time spent outside in fresh air.

Working in partnership with your UK distributor