Aluminum Foil on Window Hit by Sun/Heat = Cooler Room Temperature (Heat Wave)
Be aware that shielding the sun radiation from behind the window may increase the chance of the glass cracking (thermal stress). The chance increases significantly with imperfect glass/install, cold/hot spots and a thinner glass/pane ( double/triple pane glass usually has thinner glass ).
Up to 5 degree Celsius lower depending on window/room size.

- https://www.nuclear-power.net/nuclear-e ... materials/
Up to 5 degree Celsius lower depending on window/room size.

- https://www.nuclear-power.net/nuclear-e ... materials/
Last edited by the2ndme on Jul 9th, 2021 8:15 pm, edited 1 time in total.