New building regulations require the installation of trickle ventilators on windows and doors. This may seem overwhelming if you’re not a window industry expert or unsure how to filter and improve the air quality in your room while meeting the regulations. But don’t worry, we’ve compiled all the information you need to know about trickle ventilation.

What is Trickle Ventilation?

Trickle ventilation is a type of ventilation that ensures a consistent level of background ventilation. Typically, the ventilators are small slots integrated into window frames that are manually maintained. They can be opened or closed with a flap depending on the need for ventilation. However, they are generally intended to be left open.

Some trickle ventilators are self-balancing, meaning their size automatically changes based on the air pressure difference. This helps to decrease draughts during windy weather.

What Criteria Do You Need to Follow for Trickle Ventilator Size?

The size of the trickle vent isn’t dependent on the size of the room, but rather the type of room. Here are the typical room types of a home and their equivalent area (EA):

– Habitable room (bedrooms, living room, etc.) – minimum 8000mm EA

– Kitchen – minimum 8000mm EA

– Bathroom/WC – 4000mm EA

– Conservatory – 1000mm EA

Additionally, all trickle vents must have their size marked on the vent.

What Properties Do Not Need Trickle Vents or Require Permission First?

For buildings such as listed or historic buildings or those in conservation areas, you would need to contact the local authority first to ensure they are happy with the installation of trickle vents.

Modern buildings tend to be virtually sealed from the outside, which can cause issues with condensation if windows or other ventilators are closed. It is suggested that trickle ventilators are located about 1.7 meters above the floor level to avoid producing cold draughts.

Houses near railways, main roads, and airports are not exempt from the regulation just because they are noisy. Instead, you would need to install acoustic vents called attenuators. However, these are more significant and more expensive.

Why is Trickle Ventilation Necessary?

With better-sealed windows and more insulated homes, natural ventilation is now less effective than it was in the past. This can cause problems for inhabitants, as pollutants can build up inside the home, which, if not removed, can be harmful.

Poorly ventilated rooms can also lead to condensation, which can cause a buildup of mold. Trickle ventilators can help to reduce the buildup of condensation and harmful pollutants, leading to a cleaner and healthier home environment.

Benefits of Installing Trickle Vents

In addition to meeting building regulations, there are several other reasons why you should consider installing trickle vents:

– Maintain a consistent and comfortable temperature without worrying about overheating or making the room too cold.

– Save energy by using small trickle vents to maintain a moderate temperature.

– Meet the requirements for fresh air flow in the room.

– Achieve your energy efficiency goals.

– Prevent cracking.

– Improve energy efficiency and reduce heating bills.

In conclusion, installing trickle ventilators is essential to meet building regulations and maintain a healthy living environment. With the right size and location, trickle vents can provide a consistent level of ventilation without draughts or excess noise. They also provide additional benefits such as maintaining a comfortable temperature and achieving energy efficiency goals. If you’re unsure about installation or need permission, it’s best to contact your local authority first.