Double hung windows from Pella offer a cl.ic look with many options to choose from. Find the right double hung window style for your home at Pella.com..Pella offers different styles of replacement windows to suit your needs and home style. Learn more at Pella.com.”Had the double pane argon windows installed in July of . One of the seals on double paned window broke. I was nervous about “Lifetime Warranty.”.The benefits of double and triple glazed fiberglwindows and why triple pane fiberglwindows are more expensive. Learn more about double vs triple pane windows here..