How long does a freezer stay frozen with no power: experiments

Using a temperature sensor and Raspberry pi computer to work out how long it will take for food in a freezer to melt when the power goes out, also how much that time is reduced every time you open the freezer door.
http://woodgears.ca/heating/freezer.html

Видео How long does a freezer stay frozen with no power: experiments канала Matthias random stuff