Great questions Roy, so heres the deal. But remember my education was in Electrical Engineering NOT Mechanical or Thermodynamics SO NO WARRANTY LOL
Different materials exhibit different heat transfer and thermal storage characteristics.. Metal say transfers/conducts heat better then wood, if a big cooking pot has a wooden handle you wont get burned as if it had an iron handle. Welding gloves transfer/conduct heat very very poorly which is why when you touch hot metal the heat doesnt get transferered to your hands, the gloves are poor heat transmitters. If theres insulation in your walls, the heat generated inside doesnt get transmitted (wasted) to the outdoors quite so easily.
HEAT ENERGY CAN ALSO BE STORED:
Similar, You can use passive thermal heat to store heat energy in say a big heavy mass of concrete during the day when the suns rays strike a heavy stone pillar (a good thermal energy storage device) inside a thermal heated home, but then when the suns gone that heat is given back up into the room REMEMBER HEAT LOST = HEAT GAINED. In a big old stone fireplace, the fire heats up the big stone mass (good heat storage) and it in turn gives it up into the room. If it was the fire only, some would get radiated to the room and a lot go wasted up the chimney and that wouldnt be near as efficient of a heat source as a big stone or heavy metal mass stove, you want the big mass to absorb n store n give up heat to the room more efficient then if it all went up the chimney.
NOW MORE TO YOUR QUESTION:
Once the t stat is satisfied that the room air is 70 degrees, that dont mean all the objects in the room have YET to reach 70 degrees right?? Given enough heat energy (out of the heater) and enough time, everything in the room will eventually stabilize at room temperature SUBJECT TO their heat being transferred/conducted elsewhere !!! If theres a big metal pole that goes outside the room, Im sure you understand some of the heat will get transferred outside, it serves as a heat conductor sucking heat energy out of the room.
HEAT TRANSFER:
If you touch a metal pole in the room and its a better heat conductor then a wooden pole, it feels colder right?????????? Buttttttttt cold is the absence of heat, so consider the object feels colder because its transferring your body heat off your hands (they feel cold cuz less heat) at a better rate then the wooden pole.
When you step wet out of the shower you feel cold because the water is evaportaing (giving up heat of vaporization) and transferring your body heat to the room so it feels colder then if you were dry.
So Id say eventually everything in the room will stabilize at room temperature but different objects (different heat transer capacity) take different times to get there. And the fact of how some things "feel" colder or hotter (EVEN IF AT SAME TEMP MIND YOU) has to do with how effective they are at absorbing and transmitting your body heat away from you to themselves YEP METAL "FEELS" COLDER cuz it sucks the heat off you better then wood
Not a mechanical or thermo engineer
BUT THATS MY STORY N IMA STICKIN TO IT UNTIL PROVEN OTHERWISE
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