This stove is not just a modified wood stove with a rock basket on top… The Stoke & Embr FireNest is designed to properly heat up your sauna. Designed for saunas that are 640 cubic feet. This ensures thorough heating of the rocks, and allows heat to be dispersed properly. Does not come with rocks. Small changes are made periodically to stove designs to continue to improve the product. Please note that there may be very slight variances in the product you recieve and the product in the photos.