Vent in new double glazed windows. Retrofit versus factory.

Vent in new double glazed windows. Retrofit versus factory.

Vent in new double glazed windows. Retrofit versus factory.

Hi,
We stay in an old house. we had some new windows installed in our bedroom and had asked for vents. When they installed they had no vents.
We pointed this out and someone came along promptly and retrofitted vents.

In terms of performance will this be equal?

Aesthetically it isn’t so good as have just drilled holes but you wouldn’t notice them day to day.

Thanks for any advice.

by Ebo123

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