Paul from SWISCO responded:
May 31, 2019
Many thanks for posting. We believe your wood sashes have routed channels along the sides of the sashes. Look down on top of the sash ends and see if they have a open channel. If so, we have a balance system that wood window manufacturers used back in the 1940's: our Series 500 balances. We will need the the height of each wooden sash, as well as the glass height of the top and bottom sashes including the wood mullions in the measurements. We will figure the balance tube lengths from there. |