RSF stands for Renewable Solid Fuel. RSF fireplaces are the top of the line high efficiency fireplaces. Known in the industry as the very best wood burning fireplaces available. For new construction, these fireplaces can be equipped with central heating kits so the fireplace can heat separate rooms, or even your entire home. Built for a lifetime of low maintenance warmth, RSF makes a variety of fireplaces for your heating and ambiance needs. If your are building a new home and you will settle for nothing but the best, RSF is the fireplace for you.