Series 152 coil balance sizing
A quick learner from Northumberland, Pa. says:
March 22, 2010
The constant-force coil spring that we are looking to replace has an "E" stamped on it, not a weight #. Do you know from that designation what size spring we need?
Paul Sr. from SWISCO responded:
March 24, 2010
We need the size and weight of your window sash to figure out the proper spring size. To weight your window sash you will need to remove it from the window and put it on a scale.