Understood and makes sense This article argues the inefficiency of one: http://hearth.com/what/more/skip.html Fireplaces have long been a staple of North American households. Builders find it difficult to sell a new house without one. Yet the mythological attraction of cozy fireplaces rarely translates into reality. Most fireplaces are difficult to start, smoke, create unpleasant cold drafts, and cause a number of other unseen problems of which the homeowner is often unaware. In most homes, conventional wood-burning fireplaces are between -10% and +10% efficient. They supply little if any heat to the house, particularly with cold outside temperatures.