The Pella® 350 Series from Pella of Gaithersburg 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 match the same demanding standards as other Pella® replacement windows and patio doors.
Created with a reinforced frame that’s 83 percent sturdier than ordinary vinyl1, Pella 350 Series windows and sliding patio doors also offer precision corner welding to help prevent warping and twisting over the years. And, our exclusive SmoothSeamTM interior welded corners are practically invisible. Adding to their enduring style, our DuraColor™ exterior finish tops industry standards for fade resistance2, so you can expect beautiful, vibrant colors for years to come.
In addition to being appealing and dependable, Pella 350 Series replacement windows and patio doors are the most energy efficient that we carry. The feature 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 further with triple-pane glass, which also helps lessen the amount of outside noise that comes into your house.3