I have a thermometer in my room that takes readings over time and stores them into database. I also have a thermometer on the outside that is keeping track of the outdoor air temperature.
Let's say my reading are as follow: There are not heat radiating bodies in the room at the current moment. In two hours of passed time the room temperature have fallen from 20.3 to 20 degrees Celsius. The outdoor temperature was the same during that time and was 0 degrees Celsius.
Is it possible to calculate "good enough" heat loss number of a room only by this readings? I would be interested in using this calculations to predict the needed power requirements in order to keep particular room at 20.3 degrees for the next 8 hours.
EDIT: The volume of the room is 30m³.