you can burn pine cones in heaters like these :) small ceramic wood burning heater - Google Search
This United States Stove Company Pellet Heater is fully automated with auto ignition and easy-to-use electronic controls.
Not all Pellet Heaters are the same. Piazzetta offer highly efficient, designer pellet heaters that are both functional and stylish. Find out more here!
One wood burning Stove Whole house heating - Poujoulat Confort Plus http://www.poujoulat.co.uk/contenu/162/51/1/presentation/complete-chimney-solution-for-stoves-inserts-fireplaces-and-gas-fires.html
The classic, tiled wood stoves from La Castellamonte are available in 12 wood burning and 2 pellet models. The ceramic tiles can be finished in 32 colours, allowing you to match the decor of any room you wish to place the new tiled wood stove in.
Another two-sided freestanding stove to go between the kitchen and living room
For woodburning stoves : The Ecofan needs no power except the heat generated by the stove.
Thelin Parlor pellet-heater
pellet heaters for home | Harman Accentra Pellet Stove Insert - Inglenook Energy Center ...