Finding the right firebox that fits your home is a sure way to guarantee years of enjoyment. This unvented firebox fits into 42 inch fireplace openings. The combination of high quality materials with the aesthetic appeal makes this a perfect choice for any home. The unique radiant design has heat circulating air ducts. This unit can be installed with non-combustible material right up to the opening o the fireplace. The Herringbone refractory firebrick not only looks beautiful, it allows for heat to radiate off of it making it an economical choice.