The Pella® 350 Series from Pella of South Portland features well constructed vinyl replacement windows and patio doors that are energy efficient and priced to appeal to any budget. All of these windows and patio doors match the same demanding standards as other Pella® replacement windows and patio doors.
Developed with a reinforced frame that’s 83 percent tougher than normal vinyl1, Pella 350 Series windows and sliding patio doors also feature precision corner welding to help withstand warping and twisting over the years. And, our exclusive SmoothSeamTM interior welded corners are nearly invisible. Adding to their enduring beauty, our DuraColor™ exterior finish surpasses industry standards for fade resistance2, so you can rely on beautiful, vibrant colors for the foreseeable future.
In addition to being beautiful and durable, Pella 350 Series replacement windows and patio doors are our most energy efficient. The feature used to create energy efficiency is InsulShield® Advanced Low-E double-pane glass. Filled with argon gas, InsulShield glass options not only shield against intense temperatures, but also block the sun’s UV rays. You can increase your energy efficiency even further with triple-pane glass, which also helps lessen the amount of outside noise that enters your room.3