The new Shadowlight XL Direct Vent Gas Fireplace Insert.

The Harman ShadowLight's intriguing flames and glowing embers give the ambiance of a large wood fireplace while amazingly fitting into a 21 inch fireplace opening. The Exclusive Harman ShadowLight Burner turns an ordinary flame into extraordinary. The flame height adjuster can produce any range of fire, from low and serene to high and blazing. These flame adjustments can be made while the fire is burning.