Tulikivi, based in Finland, is the world's largest manufacturer of heat retaining fireplaces. Masonry Heater Store, LLC is proud to be an authorized Tulikivi dealer. The Masonry Heater Store specializes in masonry heaters, bake ovens, and cook stoves for homes throughout Ohio, southeast Michigan. Indiana and regions beyond. Masonry heaters are unequaled in beauty, versatility, warmth, safety, and efficiency. A masonry heater provides delightful radiant heat long after the fire goes out. This is what makes them the most efficient fireplaces around.