The Pella® 350 Series from Pella of Beltsville consists of well constructed vinyl replacement windows and patio doors that are energy efficient and priced to suit any budget. All of these windows and patio doors mirror the same high standards as other Pella® replacement windows and patio doors.
Created with a reinforced frame that’s 83 percent tougher than ordinary vinyl1, Pella 350 Series windows and sliding patio doors also feature precision corner welding to help withstand warping and twisting over the years. Plus, our exclusive SmoothSeamTM interior welded corners are nearly invisible. Adding to their continuing beauty, our DuraColor™ exterior finish tops industry standards for fade resistance2, so you can rely on beautiful, enduring colors for years to come.
In addition to being beautiful and enduring, Pella 350 Series replacement windows and patio doors are our most energy efficient. The technology used to create energy efficiency is InsulShield® Advanced Low-E double-pane glass. Filled with argon gas, InsulShield glass options not only defend against extreme temperatures, but also deflect the sun’s UV rays. You can increase your energy efficiency even more with triple-pane glass, which also helps lessen the amount of outside noise that enters your house.3