I have several single hung wood windows that I am planning to use Swisco Spiral Window Balances on. They currently have different types of balances, so I do not have an old balance to measure. I do not plan to remove the sash from the window when I install the new Spiral Window Balancers.
My Sash is 20" total in height. Above this sash is a gap of 17 3/4" that the new Spiral Balance will be available during installation. How long of a Spiral Window Balance do you feel I should buy.
I am pretty certain that I need your S500 with your 17-012 Bracket.
Also, The weight of the sash is 9 lbs. Should I buy the Red or Blue?
The groove in the sash is for a 5/8" balancer.
Attached is a drawing of the window.
Your help is greatly appreciated. Also, Non Tilt.