The Ferco Coil Spring Cassette C3 CF – Replacement Window Balance Spring is designed for PVC window balance systems that utilize Ferco’s Constant Force (CF) technology. Finished in white, this cassette helps counterbalance the window sash, allowing smooth and controlled operation while helping maintain proper window positioning.
Color: White
Type: C3 – 3 lbs
System: Constant Force (CF)
Application: PVC Windows
This cassette is classified as C3, which is designed to balance window sashes weighing approximately 3 lbs. In the Ferco balance system, the letter designation indicates the tail length, while the number represents the sash weight capacity. Tail lengths are categorized as A = Short Tail, B = Medium Tail, and C = Long Tail, allowing installers to select the appropriate configuration for different window designs.
These coil spring cassettes are stackable, making it possible to combine multiple units to achieve the proper balance for heavier window sashes. Installation typically begins with a short tail (A) cassette and progresses to medium (B) and long tail (C) components if additional balance is required.
