replacing old BSI channel balances

A home owner from California says:
July 24, 2020
Hi,

I am inquiring about replacing old BSI channel balances for non-tilting single sash windows.

The 30" S385 series channels look to be correct dimensions. My question is regarding the weight ratings. If my sash's weight comes in at 22.7lbs, should I go for 2930 or 2940, since the weight is right on the border?

Thank you,
Sung
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Bob from SWISCO responded:
July 28, 2020

The 2930 supports a window sash in the weight range of 16 through 23 lbs, so it would support a sash that weighs 22.7 lbs. Therefore 2930 is the option you want. Let me know if you have any other questions. 
30" Series 385 Channel Balance
30" Series 385 Channel Balance
S385-30
$11.30
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