zapny said:SolarAndWood said:No shame in burning Pine. Besides, you don't want an untidy spot in your woods
The wife seems to be from the old school concerning Pine so I sent her this.
Back in the early 1980's, tests were conducted to discover which kind of wood created the most creosote in a regular "open" fireplace. The results were surprising. Contrary to popular opinion, the hardwood's, like oak and madrone, created MORE creosote than the softwoods, like fir and pine. The reason for this, is that if the softwoods are dry, they create a hotter, more intense fire. The draft created by the hotter fire moves the air up the chimney faster! Because it is moving faster, the flue gas does not have as much time to condense as creosote inside the chimney. Also, because the flue gas is hotter: it does not cool down to the condensation point as quickly. On the contrary, the dense hardwood's tend to smolder more, so their flue gas temperature is cooler. Thus, more creosote is able to condense on the surface of the flue. So, saying that "fir builds up more creosote than oak" just isn't true! It is a misunderstanding to think that it's the pitch in wood which causes creosote. It's not the pitch that is the problem, it's the water IN the pitch. Once the water in the wood has evaporated, that pitch becomes high octane fuel! When dry, softwoods burn extremely hot!
zap
Yes I have found that this is very true. In fact the best way to get woods like oak, walnut, and fir to burn really well is to throw in large pine splits with them. Its like throwing in a grenade which sets off everything else.
btw, this thing about pine being a bad wood to burn is actually a bonanza for those who understand what you've posted. Lets try to keep a secret a little while longer. I've got 10 cords of oak, walnut and fir I've still gotta burn before the word gets out.