Window balances

NuAir windows often use our Series 385 Channel Balance. But this is no guarantee--the only reliable way to know what channel balances you need is to remove your old one and compare the nylon fittings. Show us pictures of your old fittings to confirm. 

Thank you. This certainly could be the S385-30. The only other possibility is the S380-30. The difference between these two balances is the depth of the bottom nylon shoe, as depicted below. Compare both with your old hardware to see what matches best. For a stamp option choose 2920. 

Comparison of the S378, S380 and S385 balance shoes.