My house is to tight and I have Pella and anderson, LowE Argon dual
pane, My pellas fog at around 35 outside , They just are not as good
as Anderson. They are rated for Condenstion Resistance Factor CRF.
Which I paid no attention to. I need an Air Exchanger. The tighter the
house , the more likley condensation. They are all different. Consumer
Reports rated them for condensation , and Pellas were rated poor. Oh
well