Kungur wrote:This past month I have had more out fires than the past 2 Summers combined. It seems that we are having some long spells of humid weather, low pressure system. And this is when I have a out fire.
My guess is the low pressure "kills" the draft.
Anyone else experiencing this?
Low and high pressure systems influence draft, not because of their "pressure" per say but because of other factors such as temperature and humidity. Probably more temperature than the other variables.
Chimney draft is a natural occurrence based on differences between the air temperature outside and the temperature of the flue gases. As temperature rises outside the gap closes between these two variables and draft decreases. But I'm sure you know this part
It would make sense that atmospheric pressure influences IF pressure in the house remained constant. But we know this can't be the case since opening doors and windows would keep inside and outside pressure equal.
Hypothetically speaking though if you could keep pressure in the house constant, a low pressure weather system would actually increase draft since there would be a higher pressure in the house. And we know high pressure always flows towards a low pressure.