Tom from SWISCO responded:
December 7, 2015
Thanks for posting! I cant vaguely make out a stamp in your first picture, though I'm not able to read it. That's fine, though. I can calculate what kind of option you should choose, I just need more information.
First, can you confirm how many springs you use on each side? I'm assuming you only have one on each side, but I just want to make sure. Next, can you tell me the weight of your sash? You can determine this by removing the sash from the window and placing it on a scale. Thanks! |
Tom from SWISCO responded:
December 10, 2015
Thank you! I recommend our S170-409. I believe this will be able to support your sash weight.
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