SWISCO - The Replacement Hardware Authority

wood tension spring(s)

A home owner from new york says:
do i need to use two sash tension springs (20-001) one on each side of window? or will one be sufficient ?
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Paul Sr. from SWISCO responded:
Usually one 20-001 spring is enough but sometimes two is needed, and on a very rare occasion more than two springs are needed.
A friend from Lumberton,NJ says:
Will tension springs work on a wood window with a metal frame?
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Paul Sr. from SWISCO responded:
I am not positive without actually seeing your application but the 20-001 spring should work on a metal track.
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