During the 1970s and 1980 the "Buck Stove" became ubiquitous as people used wood to heat their homes and save money. These wood burning stoves were light years ahead in efficiency over an open fireplace and much more efficient over older style wood stoves.
Fast forward to today. Even the more efficient stoves of 20 years ago are very inefficient compared to modern designs. Modern wood stoves and their ultra-modern counterpart, the pellet stove are extremely efficient, low smoke stoves.
Many localities such as Nova Scotia and Spokane, are offering rebates to people who upgrade their older stoves.
These stoves can easily heat an entire house even in the coldest of environments.