Pella® 350 Series Casement Window

  • 61% more vinyl makes them stronger and more durable than typical vinyl products.
  • Operable sizes up to 2' 11-1/2" x 5' 11-1/2".
  • Patented Unison Lock System secures the window in two places with one easy-to-reach handle.
  • Air infiltration ratings of 0.05 cfm/ft or better.
  • Design pressures up to 70 PSF available.
  • U-Factors as low as 0.16.

A local Pella team member is ready to help you with your project.

Features & Options

Sizes and Shapes – Pella 350 Series Casement Window


Pella 350 Series windows are available to fit most any opening.

Built-to-order in standard sizes or custom sizes in 1/8" increments.

Design Data

Design data available for egress, vent opening, clear opening, visible glass and frame area.

View size tables and design data


Add transoms or adjacent windows for flexible combinations.

View window combinations


Learn about all Pella Sizes and Shapes