Non-tilt Window Channel balance ID

Question

Please see the uploaded photos.

I want to identify my balances so I am sure to get the right part. My window is 24" x 36" x 1/4". I calculated that my window weighs about 18 pounds. My balances are marked 3420. The metal channel not including the top or foot measures 34.5". But, on the order page when I select the 34" size, the stamp options are listed as 33xx where xx is the last two digits. I plan to order the 3x30 since the original 3420 balance broke after only a year or so.

Also, the picture on the web site (34-Series-395/pd/Series-395-Channel-Balances/S395-34)shows model 15-001 shoe which is similar to my shoe. But, I note that my show has tabs/guides on either side. The 15-001 picture does not show tabs.

So, my question is, can I order the one with the 3330 stamp and still get the correct balance?

User submitted photos of a window balance.

Tom · Accepted Answer

Thanks for posting! This is not the S385-35, this is a special type of balance that will need to be custom made. This shouldn't be an issue, as this isn't terribly uncommon. I just want to clear up a few details before we continue.

Let's start with the length. Can you confirm the exact size of the metal channel? This kind of balance usually ends on the 5/8", not 1/2". Based on your stamp, it should be 34-5/8". Let me know.

You also say that the current balance broke after only a year, which makes me think the 3420 spring strength option is not strong enough. Can you tell me the exact weight of your sash? It would be best to place it on a scale to get the weight, that way we can know exactly what strength will work for you.

Finally, please tell me how many you need.