3 ms·
> There’s no rule of airflow which says air only flows upwards. When you are burning a fire there is a rule, it's called the stack effect, it is the very point
by simonsarris 3y ago
> There’s no rule of airflow which says air only flows upwards.
When you are burning a fire there is a rule, it's called the stack effect, it is the very point of having a long (and ideally straight) chimney.
- graeme 3y agoYou’d be a fool to burn a fire in your home if your fireplace has no chimney. But that doesn’t mean all the smoke goes upwards. Surprisingly I couldn’t find a single study which measured PM 2.5 from fireplaces with chimneys. However, a study on wood stoves (substantially better sealed) found a 30% rise. Which is actually less than I would have predicted. I’d still expect a fire to be higher, but I’m open to being wrong. If I’m ever going someplace with a chimney and fire I’ll bring a pm 2.5 meter for fun.