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Tom from SWISCO responded:
September 13, 2017
It depends on the diameter of your balance tube.
You seem to think Series 900 is right for you; do you think your balance is 3/8" in diameter like that one? If so, S900-30 sounds right. If not, S600-30 for a 5/8" tube will be the better choice. In either case, there will be a slightly different process to choose a tip color. Frankly, it would make more sense if your balance tube measured 5/8", since the S600-30 comes in a blue tip, whereas the S900-30 does not. If you have S600-30, you can likely just use the same tip color as before, if you check the weight of the sash to be sure it works. S600-30 in blue holds between 12 and 31 pounds. If you truly do have a 3/8" balance, you'll need to remove and weigh the window sash to determine your tip color. It wouldn't be blue, since that isn't an option. Compare the weight to the chart on the S900-30 webpage to determine what tip color matches your weight. |
