No. They're very cheap.
I'm trying to draw up a long list of things to help with winter energy bills.
I'm hoping trickle vents will help to reduce moisture on the cold external wall of the house and prevent/reduce mould.
I’d have a check, even the cheapest windows usually have them. It’d probably be a lot more cm2 opening than a trickle vent though I guess.
@dbr started
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No. They're very cheap.
I'm trying to draw up a long list of things to help with winter energy bills.
I'm hoping trickle vents will help to reduce moisture on the cold external wall of the house and prevent/reduce mould.