What Are Trickle Vents?

Trickle Vents are the way forward in ensuring your insulated household doesn’t star to rot from the inside. Find out why below.

Trickle Vent on windows overlooking mountains

What are Trickle Vents?

In basic terms, Trickle Vents allow a passive movement of air from inside your home, to the outside. They help in ensuring the quality of your home and limit the chances of damp building up in and on your walls. 


What is the purpose of Trickle Vents? Why do we need them?


Through the past couple of decades there’s been a real emphasis on the research and development of home insulation. As the prices for energy skyrocket and the warmth of the planet increases from burning fossil fuels, we’ve started to really focus on how we keep our houses warm. Insulation is the best way to keep heat in.

You can think of it as summer time in the UK – that one day of sun we have that seemingly shifts closer to September each year. You’re sat outside in the heat, perhaps with a glass of cold orange juice which may or may not contain vodka (That’s a vodka sun by the way). Suddenly, the suns gone in and the warmth is gone, what do you do now? You can either head to B&Q or The Range and pick up a space-heater for your garden, or just throw on a hat, a jumper and some shoes. 

That’s what your house is doing with full insulation, without loft insulation (your hat), you’ll be losing 25% of the warmth you’ve just paid for in your boiler. Without wall insulation (your jumper), you’ll be losing 30-50% of the warmth. Without underfloor insulation (your shoes) you’ll be losing another 10%. Without double or triple glazing (get that facemask on) then you’re looking at another 10-15% gone. All that money that you’ve spent warming your home has been wasted and it’s just heating the street instead. 

This is why all homes should be insulated, and why the government has released ECO3 – to keep the heat in once you’ve made it, and to make the heat cheaper by improving boiler efficiency. 

So let’s say your house has its hat, coat and shoes on and you’ve fully insulated it.  That’s excellent because you’re retaining all of your heat and warmth, as well as air. The air part isn’t as good – air is where moisture is held. If you’re cooking a dinner, or you’ve ran a bath, or you’ve washed the dishes, or if your house has a few people in it that are literally just breathing, there’s moisture in the air. Moisture leads to condensation, which leads to damp, which leads to rot. Condensation is bad, and we need to get that out the house. 

One of the simple ways is to open the doors and windows – the humid air will find its way outside and your house will be relieved, but as the moist air leaves so will the heat. It’s not ideal when you’ve been warming your house for two hours and now you’re going to lose it all and have to switch the heating back on. So keep the windows shut. 

This is where Trickle Vents come in. Trickle Vents are a way to ensure you’re always getting that air circulation you need, without feeling the cold and without losing the warmth in your house. They let out a slow and steady stream of air and allows moisture to escape the home, but nowhere near the same amount of air movement as an open window. Plus, on most of them you can actually close them too. So if you’re not cooking or running baths, just close them! 


Where do I need Trickle Vents?

Trickle vents usually go at the top of UPVC windows and doors, they can either come preinstalled on new windows and doors or they can be retrofitted to existing windows and doors. You’ll typically need one in every room.  Habitable rooms and Kitchens, bathrooms and utilities are treated differently in the minimum requirements needed. If you’re spending a lot of time in a single room, so something like a living room or a bedroom, they’re “habitable” rooms and they need more ventilation. Typically a habitable room needs either a 600mm or 800mm vent, or you can split that to have two 300mm or two 400mm vents. For the Kitchens, Bathrooms and Utility rooms have a lower requirement, typically half of that of a habitable room. It does depend on the size of the room though. If you have a huge kitchen filled with hobs and ovens and sinks and a massive fridge freezer and you’re cooking huge family meals each night, you’ll obviously need more ventilation in there to counter it. 

Need some help?

A member of our team will be more than happy to help you disucss your options. For more information and assitance please…

Borthwick Heating Inuslation UK is a trading style of Borthwick Group (Energy) Limited Registered in England & Wales| Company No. 06753929 

Borthwick Heating & Insulation are regulated by the Financial Conduct Authority. We are a Credit Broker and not a lender. We offer Credit Facilities from a panel of lenders. Borthwick Group (Energy) Limited is the full legal and registered trading name of all activities that advertise themselves as Borthwick Heating & Insulation and online as www.borthwickheating.co.uk


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