Skylight operator

A contractor from Cape Elizabeth, Maine says:
January 10, 2016

Total chain length is little over 12 inches. Should I assume the 9 1/4 " measurement accounts for about 2 3/4" of chain remaining on the teeth of the sprocket of the operator? The name Ventarama is found on the window hardware.

Existing skylight operator
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Dave Sr. from SWISCO responded:
January 13, 2016
I'm not sure if it will match up exactly, but take a look at our 39-379 Skylight operator. See if you can adapt it to your window. It works on the same principle with that "chain" type gearing, but it's different enough that I can't guarantee it will work.
A contractor from Cape Elizabeth, Maine says:
January 20, 2016
Can I return the 39-379 skylight operator if it won't work with the skylight I'm repairing?
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Dave Sr. from SWISCO responded:
January 21, 2016
You can! Check out our return policy for more detail.
Skylight Operator, Angle Drive
Skylight Operator, Angle Drive
39-379
$81.30
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