What type of heat transfer takes place when a furnace heats up an entire room?

What type of heat transfer takes place when a furnace heats up an entire room?
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Answer :

So in order for a furnace to heat up in the first place, there needs to be a fuel or substance that heats or absorbs heat. This can be gas, coal, or charcoal. In addition, the fuel or coal, the fire or heat will begin to well heat, then heat will begin to spread. Causing heat, or humid to form in the room you are in.HOPE THIS HELPED:)))))
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