Your Guide to Window Ventilation
Published on: October 10, 2025

Ensuring that your home or commercial building has proper ventilation is essential for the health of its occupants. If the air quality is poor, people can get ill, and ineffective ventilation can lead to issues like damp and mould.
Don’t worry, we have a solution. Our ventilation systems help to circulate fresh, clean air around each room, preventing any of those issues and guaranteeing better air quality overall.
But don’t just take our word for it, let’s dive into the world of window ventilation and we’ll explain why it’s so important.
First, the basics.
What is Window Ventilation?
When you have a window open, air from outside mixes with the air inside. If the air inside is stale, it will be diluted by this new air, and this will remove any stuffiness or ‘must’.
In the past, new air could circulate via a few ways, not just your windows. Chimneys, doorways, even uneven floorboards could allow enough air in to be noticeable. This was often the cause of annoying draughts, but it improved the air quality as a result.
However, nowadays our homes are designed to be as energy efficient as possible. This means sealing all those gaps that previously improved ventilation in order to keep our homes warmer. This is great for our energy bills, but it has had an impact on air quality within our homes. You’d be surprised just how making our homes just a little more air-tight or energy efficient can impact the way a home is breathing; and not always for the better.
So why not just open a window? Well, it isn’t quite that simple.
Why Windows aren’t enough to Ensure Proper Ventilation
While opening a window is a brilliant method for letting some fresh air in, you won’t have yours open 24/7. Overnight, when you’re out and about, and during the colder seasons, your windows will remain firmly shut for hours at a time. When you wake up or get home, you want to be greeted with clean air, not a stale, musty smell that can linger long after you’ve started letting fresh air in again.
And air quality isn’t the only reason why you need to improve ventilation in your home.
Issues caused by Poor Ventilation
There are a number of issues that poor ventilation can cause, but they can be separated into two categories. The first is how it affects people. As well as stale air not being pleasant, it can also make asthma and breathing issues worse.
During the day, as we breathe, wash clothes, and do other household tasks, a lot of moisture is added into the air. This moisture will settle onto your surfaces if the room isn’t ventilated, which can make them mouldy over time.
This is how we get damp patches on our walls, or why our carpets never seem quite as dry as they should be. If mould does start to grow, this can be a serious health hazard that needs to be addressed as soon as possible. But mould can be sneaky, growing behind furniture or in places where you wouldn’t notice such as your attic or cellar. Once you do find it, it’s a much bigger job to clean it, and one that you need to be very careful with.
Thankfully, all of these issues can be prevented with trickle vents.
The Importance of Trickle Vents in Modern Homes
Since most modern homes now have UPVC windows, the seal between them and the wall is faultless if they are fitted correctly, meaning no air can get in when the windows are closed. Thankfully, this can be remedied by installing trickle vents.
Trickle vents are a common sight on modern windows, allowing clean air into your home when the windows are closed. They don’t impact your energy bills in any way, and their height means you’re very unlikely to notice a draught.
Keeping the windows open for long periods of time or overnight can be a security risk. With trickle vents, no one will be able to gain entry, but you also won’t have to worry about what could be growing while you’re asleep or away on holiday.
Trickle Vents for Commercial Buildings
It isn’t just our homes that can be ruined by ineffective ventilation. Office buildings, schools, and any other commercial space that has UPVC windows could be suffering from bad ventilation. As a business owner, the welfare of your employees is paramount, so making sure the air quality is good should be a priority. And not having to deal with mould and damp is naturally an added bonus.
We should add that poor ventilation is not the only cause of dampness. High humidity or leaks can also lead to damp patches and mould, so if improving the ventilation doesn’t seem to help, there may be a bigger problem that you need to address.
The Best Trickle Vents
If you need to install trickle vents to maximise the air quality inside your home, you need the best ones for the job. At Air Box, we’ve meticulously designed the best ventilation system that doesn’t sacrifice energy efficiency. Unlike some of the fixed trickle vents, these are wider, creating optimal air flow that is directed high, so it doesn’t feel like there’s a draught.
Available in white, brown, and anthracite black, we have ventilation systems that suit any window, and their subtle design means they don’t stick out or get in the way of blinds or curtains. There also a breeze (sorry pun intended) to fit! The take just a few minutes each to give you the huge upside benefits of clean fresh air with no drilling or cutting of your windows.
If you’d like to find out more about our trickle vents, or about our business, please don’t hesitate to get in touch. We look forward to hearing from you.
		
		
		