Arctic Tern Double-Pane RV Window (450x610mm) by Tern Overland

Arctic Tern insulated windows

I put 3 of these Arctic Tern windows in my Promaster. See review of the 450x1100mm window for full review

these are the BEST windows.

This is our third Arctic Tern window. The first 2 purchased in 2018 were easy to install and have performed perfectly. The shades and screens are easy to use. The double pane construction provides good insulation. Keeping them open in the rain is priceless.