After using my unit in northern Alberta with temps as low as 28F. I am happy that I have dual panes. I could sit next to the windows with a tee shirt on and feel no chill at all. I just hope they last for quite a few years before the seals leak.
Mine are still tinted but not as dark as single pane. Still very private in daylight.
Don & Donna
Vancouver Island
2005 Ford F350 V10 Lariat CC 4x4 LB SRW 11200 GVWR
2006 Montana 2955RL
click on the little pic to see a big pic