I have lived with both wood heat and have used Kerosene heaters too.
Both are good. Kerosene is a lot more instant on and instant off than wood is. Kerosene units have become harder to find lately and kerosene itself has become more expensive.
http://www.toyotomiusa.com/products/portableheaters/DC-90.mv

The propane catalytic or radiant heaters are pretty efficient and supposedly can be used inside if you need to, but they make my eyes water so I don't trust them.
USA govt studies agree:
http://www.cpsc.gov/LIBRARY/FOIA/FOIA05/os/CO03.pdf
http://www.cpsc.gov/LIBRARY/FOIA/FOIA05/os/CO02.pdf
I am also very uneasy about having propane inside a building, yet we used to use propane powered forklifts in warehouses because the CO emissions were so low.
If you are not sure what I mean by propane radiant or infrared heater here is a seller's page with pictures.
http://www.heatershop.com/propane_radiant_heaters.html

Either way, IMHO any heater that burns a fuel and is used inside needs good ventilation. Usually if it is attached to a chimney it sucks enough air around doors and windows to be OK. Id it is ventless you should at least have some windows partly open.