Author: Sharil (---.direcpc.com)
Date:
I found info on a window called "Ultimate 2000" - not sure who manufactures it - that states it uses a spiral mechanism. On another website for the same brand, all other info about the product was exactly the same except instead of spiral it stated "constant force balance system" which I noticed other brands utilize. Due to info I've read here, I'm leary of brands that use the spiral system. How could I be sure that if a brand states "constant force" it is not the spiral type since the information on this particular window claims both?
Thanks for any insight...
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