SWISCO - The Replacement Hardware Authority

Can the 90-304 work on a double hung window?

A quick learner from NY says:
This can be used on a double hung window, correct?
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Dave from SWISCO responded:
I believe the 90-304 does work for double hung windows. It more or less just clamps onto the track of the main frame of the window. Personally, though, I like our 26-387. It's a little more work to install, as it has to be fastened with screws, but I think it's a better solution overall. Check out the video below to see what I mean.
A quick learner from NY says:
Thank you, that looks good. Do you need to put 2 on each window or is 1 sufficient?
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Dave from SWISCO responded:
Yes, two on each side is ideal. This is so that the sash won't be thrown out of square when it hits the locks. The 26-387 kit comes with a pair.
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