I assume heat will spread, conduct and transfer if exposed to air or different conductors.
But what happens if heat is contained?
Let’s say I have a box that is made of a hypothetical material that does not conduct heat at all (100% heat escape proof), and in it I contain air with a temperature of 80 degrees.
I then put the box in a freezer.
Will the air inside the box stay at 80 degrees? Or will it decay by itself over time? (And if so, at what rate?)
I ask because I bought a three story house and I’m considering building a constantly very warm “spa” bathroom in the center of the second floor, and my hypothesis is that this will be energy efficient since the bathroom will function as a warm heart that spreads heat to the rest of the house, if heat behaves how I hope it does and doesn’t decay and disappear by itself
In: Engineering
No, heat would not decay. But such material does not exist, so in the pratical application of your “spa” it will. And you will have to keep pumping in more heat.
Also warm air is less dense and that makes it go up. Unless it’s blazing hot (to a point where you couldn’t live inside it) your “spa” will not function as a heater to the entire house. Not equally so. The upper floor will be warmer than the bottom one. How warmer depends on the size of the house, the size of the spa and the insulation on the outside walls of the house.
TLDR: Your “spa” would be nothing more than a glorified oil heater.
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