I have an object that is decently thermally insulated. I want to plot how a constant cooling power of a few watts for a few minutes is going to affect the object's temperature. I need to account for how much heat is leaking in. Getting a constant cooling doesn't seem easy. If I instead use constant heating and then just "flip" the results, would my results be good? I.e would I see how much heat is leaking in by looking at how much is leaking out?