Think air, and think patio (the concrete or rock surface of the area). Keeping a patio warm in winter could be accomplished by enclosing it and heating it in a conventional manner. Heat would be absorbed by the air and, to a degree, by the surface of the patio. (Rooms are warm because the air in them is warm, but primarily because the objects in them are warm.) A number of construction companies specialize in enclosing a patio. Heating an outdoor patio is a challenge. In this energy-conscious world, running heating pipes under the surface of the patio would be grossly inefficient. For the unenclosed patio, consider one of the number of devices that could be used to provide direct heat to individuals on the patio while they are there. The propane gas heaters that house the fuel tank in the base and rise up on a pole some six or so feet to the burner are becoming more popular (but are generating controversy in Europe because of their carbon footprint). There are also small ceramic wood burning stoves for outdoor use. There are no "trick" solutions, no novel methods to keep an outdoor area warm. Heating the air would be pointless since the warm air will just leave. Heating the surface of the patio would take a staggering amount of energy.
Thermal energy heats your house in the winter.
Insulation impedes the movement of heat. Thus, by adding insulation to a house, less heat can escape into the surrounding air.
the Heat produced by electricity or fossil fuels like natural gas and radiation like sun that comes in by windows.
you just put the heating on.
Natural gas
turn up the heat
For houses, insulation is needed to keep the house warm in winter.
A house uses insulation to keep you warm in the winter. Insulation is also used in carpet to keep your floors warm.
there mammles kadu.
They don't need to keep warm, they have a double coat so they stay warm.
its fur keeps it warm
cats have fur to keep themself clean and in the winter they keep themself warm if they do not have fur they go through peoples house looking for stuff
Die
they are idouts
you keep it warm
they huddle
They hibernate.