Alton Evolution louvre opener
Automatic attachment for a Louvre vent, fits most louvres. Its fully adjustable to open over a range of temperatures.
Some drilling is required to fit.
Q. Can these auto vents be used with a double opening window, should I buy 2 of them?
A. A double sized (1200mm + wide) single vent would require 2 of these Auto-vents. I would recommend the stronger BAYLISS XL auto-vent openers for a large vent like this for extra reliablity during windy conditions.
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