GB DIY Store 5 x uPVC Window Trickle Slot Vent White 400mm White - Reduces Condensation, Damp & Steam (5 Pack)

I bought these to replace the inner vents that had all been broken due to poor design. These replacements are great for the price and were easy to install. These replacements vents are much stronger than the existing ones. The open and closing mechanism is much easier to operate.

Great value, slightly to big on the vents even though it’s the correct measurements.

Good value looks good fittings

The product was as described, works well, easy to order and quickly dispathed.

My advice to anyone installing these to replace an existing 4 inch hole wall vent Is to drill no more than 3 holes with a 13mm drill bit unless you want arse froze off you. They are a bit cheap and flimsy but look OK and do the job. I had to seal up most of the holes I made due to the draft effect but everyone's situation is different due to wind direction and climate etc. So start small and see how it goes. Ventilation by itself doesnt solve condensation problems but helps. I've had huge condensation problems before and vents didn't work so if you have that problem trust me its not the way to go. I installed these because my old existing vents were the drafty. Ive now sealed most of the holes to suit my needs and happy

very simple to fit, even though l had to drill pilot holes for screws in the plastic windows as not quite the same centres. reason i only put 4 stars is the internal vent cover seems a little thin and flimsy, but used with care should be o.k. I'm happy with the product.

Easy to fit look smart

Very easy to install, as just two screws and drilling some air holes. However, it really needs some sort of central fixing or support as it’s very bendy in the middle. Secondly there is no screening on the inside vent. So once the flap is open, you see all of the holes you’ve drilled. Where as there is screening on the outside, which’s masks them a bit better.I don’t know if I would buy these again based on the above as I’m now on the hunt for smallMesh to hide the holes when open. If this doesn’t bother you, then these are ok vents and fairly cheap.