Nothing can replace the warm embrace of a real wood fire.

A wood fire seems to give off a special kind of warmth that penetrates and soothes. It's true that burning wood in your fireplace isn't as convenient as burning gas. But like all of life's best things, that little extra effort makes a world of difference.

If it's a real fire....it's wood.  And if it's a clean burning efficient wood fire it's probably an RSF fireplace.