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Paul from SWISCO responded:
April 27, 2017
Hello! I will do my best to answer your questions.
First, the best way to match up your springs is by going off of the numbers on your old springs. They usually tells you exactly what you should go with, especially if you found that your windows worked fairly well up 'til now. That said, I'll briefly make a few suggestions for the sash weights you detailed: -For the 13.75 pound sash, I recommend four S160-3 springs. -For the 15.15 sash, I recommend two S160-4 and two S160-3 springs; you would use one S160-4 and one S160-3 on each side. -For the 15.75 sash, you would use the same as above. -Finally, for the 17.5 pound sash, I would use four S160-4 springs. For your second question, there is no advantage for using more coils. We highly recommend trying to copy what the manufacturer went with. |
