That makes little physical sense sorry... your house has a specific heat loss that you have to compensate for -.- you can burn cucumbers or pellets, it always stays the same.
Of course, if you throw 200 kg of wood into the stove and then throw the windows open because it’s too warm or spend 2 days at 24 °C, maybe that works out.
But I think that’s little advertisement for pellets or wood, rather for heat pumps or condensing boilers.