I am wondering if anyone with a science background can help show me how to calculate heat loss.
The concept is to build an insulated room inside a house that is small enough to maintain a temperature heated by body heat.
For example, if I had a cabin heated by a woodstove, but I got a fever and could not keep the woodstove going, I could retreat to a cold safe room that is insulated well enough that body heat alone would keep it at a certain temperature.
If I look at building materials, such as this 2"
foam board, it is rated at R 7.7 .
If I built a room of this material in a size of 8' x 8' x 8', and the external temperature was 20F, how warm would it be inside the room if heated by body heat?
Assume that there is a perfect heat exchanger providing fresh air.
I am mainly interested in how to calculate this, what units, etc.