Is glass better than plastic for the window of a box cooker?
It has been reported that glass provides about 10% better performance than plastic. And there is reason to believe that under windy conditions, glass is preferred since it doesn’t flap in the wind and pump heat out of the cooker. Plastic, however, is often recommended since it is much less fragile and easier to transport and works plenty well. Plastic glazings will have to be replaced periodically though since they are broken down by UV light. One excellent, easily-obtained plastic film is that used to make oven cooking bags. These are for sale in grocery stores and cost less than US$1 per bag. Other plastics will also work. Plexiglas also works well. See Plastic bags.
