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Trickle vents help to deliver natural ventilation in buildings

ECOSlide uPVC sash windows are designed to improve natural ventilation in the home, trickle vents have often proved unpopular with homeowners because they can spoil a window’s aesthetic appeal.

However, thanks to ECOSlide’s ingenious design, this isn’t an issue. The vents are cleverly concealed in the sash rebate, making them virtually invisible.

This means ECOSlide windows can let in fresh air and comply with Part F

What is Part F?

Part F governs ventilation, and in 2022, the government amended it to make it more demanding.

The regulation now states that “all rooms with external walls should have background ventilators”.

Technically, this allows for a wide variety of different ventilation methods – including more complex mechanical ventilation systems as well as simpler solutions like trickle vents.

Part F requires buildings to have sufficient natural ventilation, and as long as that’s achieved, it doesn’t matter which method is used to deliver it.

However, more complex ventilation systems are expensive to buy, tricky to install, and require ongoing maintenance.

Window trickle vents are a much simpler, more cost-effective solution – and that means that, in the vast majority of cases, they’re going to be used instead.

That’s why we ensure ECOSlide sash windows include trickle vents as standard, allowing them to meet minimum ventilation requirements and help projects fulfil Part F.

Why is ventilation needed?

In recent years, the industry has understandably focused on making window and doors as energy efficient as possible.

This is extremely important, both to ensure the UK meets its 2050 target for achieving net zero, but also to help homeowners reduce their energy bills.

However, when buildings are too airtight, other problems occur – stale air, excess moisture and mould. Damp and mould in particular can cause lasting damage.

Can you add trickle vents to existing uPVC windows?

It is possible to add trickle vents to existing uPVC windows. Additionally, it’s worth noting that not all uPVC windows are compatible with trickle vents, so it’s best to check with the window manufacturer, like us at Victorian Sliders, or installer before proceeding with installation.

Should trickle vents be left open in winter?

Trickle vents are designed to improve air quality and reduce condensation, but they can also let cold air in. To balance energy efficiency and air quality, it’s generally recommended to keep trickle vents partially open in winter. However, it’s important to adjust them as needed based on temperature and humidity levels. It’s not advised to leave trickle vents fully open at all times, as this can lead to excessive heat loss.

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Great company to deal with - the customer care dept are always very efficient and the parts are delivered without delays

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Victorian Sliders are a valued part of our supply chain. They offer an excellent product at a very reasonable price. We have always had good communications and professional service. we...
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I have been installing these windows for around 10 years with no issues other than very minor ones that get rectified like the odd scratch. Any product Is a poor...
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February 2024


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We had 12 Victorian slider windows fitted as replacement of the old wooden single pane sash's to our home on the Isle of Man in June of this year 2023....
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Victorian sliders are very professional…

Victorian sliders are very professional and really nice people. I highly recommend this company. Good quality and excellent service.


16 August 2023


Great customer service from a knowledgeable account manager!

We have been buying sash windows from Victorian sliders for just over a year now - the windows are really well made and great value . Gracie has been our...
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The sales team are always more than helpful with setting up our orders and answering the million and one questions us and our clients have. We love having Maddy as...
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Whenever we need sash windows we always use Victorian sliders , their product is great and the service is good. We usually deal with one person for our area which...
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14 August 2023


Nationwide Distribution throughout the UK & Ireland

We have 6 depots spread across the UK and Ireland, meaning we can offer a reliable delivery service to tradespeople nationwide. In addition to our West Wales HQ, we have depots in Weston-super-Mare, Essex, Warrington, Scotland and Ireland.

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Unit 72, Grayshill Road
Westfield North Industrial Estate
North Lanarkshire
G68 9HQ

Scottish Depot

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Unit 6,
21 Westway
Chesford Grange

Warrington Depot

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Cambridge House
Cambridge Road
CM20 2EQ

Harlow Office

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Unit 2 Tullow Business Park
Rathoe Road
Co Carlow
R93 N349

Victorian Sliders Showroom

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Head Office (South Wales)

Victorian Sliders
Victorian House
Parc Hendre, Capel Hendre
SA18 3FA

Arial shot of factory

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Unit 4, Red Lodge Business Park
Warleys Lane
West Wick
BS24 7TN

Victorian Sliders WSM Sales Hub

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