I am replacing 11 DH, 1 3 lite casement window and a sliding patio door in my home. I live in PA near Lake Erie. The winters are cold, snowy and windy and the summers are moderate. I have quotes for 3 brands of vinyl replacement windows that all qualify for the tax credit; Gorell 5300 with AC Master glass, Seaway Encore -another double pane, or Simonton 5500 with starter ETC -for this quote the sliding patio door will be triple pane. The quotes include full screens, and woodgrain on the inside and are all close to $10,500. For an additional $80/window, I can upgrade the Gorell to the EM3 glass -triple pane. I realize that I am not going to be saving any money on my heating bill if I get the triple pane. But, won't I be more comfortable as in less convection heat loss? Another question, the EM glass is filled with argon, not krypton. I assume that this is a lower cost alternative, but is it less efficient? Is the double pane going to perform as well as the triple pane with no noticable difference?
Thank you in advance for any help.