Channel balance option

I am replacing a channel balance marked 2919. What option/strength should it be replaced with? Richard

I cannot tell you the exact weight but I can say I ordered a 2920 thinking it was close to 2919 and installed it and it will open the window fine but is not strong enough to keep the window open. When I removed the window I would guess its weight to be about 20 pounds. Photo attached. RP

I bought 4 30" series 395 Channel Balance, S395-30 Option 2920. We also bought sash carrier, 15/16, 18-185. My friend and I installed one set in one window. Everything worked perfectly, both ends fit the space as expected, except the spring won't hold the window open. The suspect window is never opened so as long as I could open and close it, I was OK with the status quo.

My original question was sent so I could buy the correct option/strength for future use in other windows where either the Sash Carrier or the channel balance might break. These hurricane windows are a breed among themselves.

I would take out the suspect window and weigh it except I have to remove all the surrounding molding to get it out! Hence why I am OK with the status quo.

I accept your recommendation of a custom-made channel balance but I think I will wait until the next window channel balance or Sash Carrier breaks. At that time I would have to remove that window and possibly could get the accurate weight and maybe we would find a stock option that would negate a custom-made product.

You have been very helpful in my understanding of channel balances and other window parts. I think that is the whole story, sorry it was so long. RP