I own a fireplace with a blower type mechanism that sucks air in from the bottom and seem to direct the air near the coal bed. While this makes the fire larger and easier to get really hot, I would like to think that this does not increase the efficiency at all. Wouldn’t the blower increase the amount of air that gets heated and expelled through the chimney? BTW, I do not think that there is an outlet where the heated air is expelled back into the room. Searching the internet brings up mixed results. So whats the straight dope, to blow or not?