Same principal as a wood gassifier boiler with storage. THat system can let you use the heat for days after the fire in mild weather. Plus its a cleaner burn. MOs tlikely less costly and nat as hard to install and setup. IN the meantime i will experiment with surrounding my wood stove with a few ton of concrete blocks for heat storage to see the results.[/quote]
Sure hope that stove is in the basement with a good concrete floor under it. Wooden floors likely won't care for that much point loading.