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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.

  • 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.

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