One of the retailers that offer dual fuel wood furnaces is Woodland Direct, as of early 2015. The company offers a range of indoor, as well as outdoor products, including wood- and coal-burning Fire Chief furnaces and various multi-fuel furnaces.
The Fire Chief FC700E is an indoor coal and wood burning furnace that is priced at $2,599. It is suitable to use as a home's primary source of heating and has a maximum heating capacity of 3,000 square feet.
For heating just one room, a standalone wood-burning heater is more appropriate. The Timberwolf TF100 is designed to meet this need.