This is a shrink wrap sheet for the inside of your windows that adds another layer of air to insulate your home from outside temperatures. Also great if you have leaky windows that allow for air to pass.
Link - Frost King window insulation Kits : http://amzn.to/2qgQjng
My PlayHouse is a channel where i will show, what i am working on. I have this house, it is 168 Square Meters / 1808.3ft² and it is full, of half-finished projects.
I love working with heating, insulation, green power, alternative energy, solar, wind and more. It all costs, but I'm trying to get the most out of my money, and my time.