We have developed a heat storage module in beautiful Soapstone for some of our wood-burning stoves. These are the models: TT20RS, TT21RS, TT21RLS and TT21RHS.
Specifically, the module consists of a platform and 6 Soapstone components. The main advantage is that Soapstone is a natural material, which stores the energy of heat and releases it slowly. When you combine the stove with the heat storage module, you have the possibility of saving heat for up to 13 hours after the fire has gone out. This is demonstrated by the results of tests performed in an environment of 70 m2 with normal insulation and room height.