If you want to heat your sauna from another room or outside the building then this Harvia Legend 300 is for you. The innovative structure that separates the combustion air and directs part of the air to the upper part of the fire chamber will give you a cleaner and more efficient way of burning. The large amount of stones integrated with the modern black steel grate structure gives this wood-burning heater a longer lifespan. The Harvia Legend 300 offers a comfortably moist sauna bath for a smaller sauna. The wood-burning heater is a treat for the eye and for the sauna bather, the Harvia Legend 300 is equipped with a cast-iron glass door, allowing the warm glow of the fire to complement the sauna atmosphere. The adjustable legs make the wood-burning heater easy to place in the sauna. Required sauna stones 572 lbs (13 boxes) sold separately. For sauna rooms from 494-988 cu. ft. Requires a minimum of 572lbs of stones ( 13 boxes-AC3020) Please note that each natural stone is unique in shape and size. We recommend purchasing an additional box of sauna stones to allow you to choose the highest quality of stone for fit, form, and function (Additional freight charges will apply). Designed, engineered, and made in Finland Dimensions: 23"W (600mm) x 25.98"D (660mm) x 40.94"H (1040mm) Installation and Operation Manual 572lbs stones (Qty 13 × 44lbs of 10-15cm stones)