Follow along with the video below to see how to install our site as a web app on your home screen.
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Normal
If you check out the graph on the site, you can see what I'm talking about. The graph is of "aquarium temperature over time", so the slope is proportional to refrigeration capacity. It's steepest in the high 20s, and gets flatter as the temperature drops. Extrapolate the (negative logarithmic) graph and you can see that the lowest feasible temperature is around 12 degrees.