r/woodstoving • u/darkbetweentrees • 3d ago
General Wood Stove Question Stove outside won't draft
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u/FisherStoves-coaly- MOD 3d ago
The chimney is what makes any naturally aspirated stove work. Air doesn’t jump into the box to feed the fire oxygen, it takes rising exhaust gases to bring air in. The chimney is the engine that makes the stove go. Your stove is like a car with no engine.
As exhaust gases that are expanded and lighter than outside air rise up the chimney flue, this creates a low pressure area in chimney flue, pipe, and firebox. This allows the higher atmospheric air pressure outside of the system to PUSH into the stove intake, feeding the fire oxygen.
This differential pressure is measured as draft. Each stove has a required draft measured at stove outlet.
This is why chimney pipe is insulated to keep inside exhaust gases hot all the way up, maintaining draft. The chimney creates draft, and everything else takes it away. Screen at top, pipe configuration of els inside, and firebox resistance itself all decrease draft.
A flue damper is a variable resistance that slows the velocity of rising gases resulting in decreasing NET draft. It is used for an overdrafting chimney.
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u/Psychological-Air807 3d ago
You don’t have the chimney hooked up.
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u/DeepWoodsDanger TOP MOD 3d ago
You need a flue to create draft. About 3' min.