Misc ramblings here...It struck me the other day that a woodstove (and non-stoker coal stoves) are really the simplest type of heating appliances since there are basically no moving or automated parts, yet woodstoves use the most complex commonly available fuel available. The variables: 1. Wood species - varies significantly in BTU content, seasoning time, ease of processing, and availability 2. Moisture content - Varies based on how cut. Dead tree vs live and seasoned. Varies based on seasoning time and storage technique. 3. Burn time - varies on size of splits, species, moisture content 4. Manual intervention - need to intervene based on outside temp, stage of burn, ash removal, cleaning (stove and chimney) 5. Stove type - Stove material, cat vs non-cat etc... 6. Human expectations - whole house heater or space heater (a furnace always has whole house expectation...expectations of a wood stove sometimes don't match reality) 7. How the stove is loaded. 8. Knowledge of wood's burn stages can be useful knowledge when dealing with what wood to burn when. 9. Installation parameters - freestanding vs insert vs masonry heater, main floor vs basement vs ??? 10. Chimney efficiency - As it relates to many of the above items...This is a whole category in itself. With oil, gas, and even coal, the fuel is what the fuel is, and humans don't have any ability to modify it much. Manual Coal stoves have some the above properties also, but to lesser degrees. People here talk about technique a lot from how to put wood in a stove, size of splits and even adjusting the kind of wood they use on warm days vs cold days. Don't usually hear oil furnace owners discuss the moisture content of their #2 oil or a natural gas user discuss how long it took them to get the furnace up to 500 degrees. Wood takes a lot of local processing, and some of it is scientific, some is art. I don't intend to make any conclusions here, just observations maybe on why wood heat invokes passion like no other fuel source. Effort to accomplish something usually results in some level of pride in the outcome. In this case hopefully, a warm and cozy home heated with domestically produced, renewable, and inexpensive source of BTUs.