Type-a Vent Vs Type L-vent

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danrclem

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This is about a freestanding oil stove and not wood heat but since this is a forum with a lot of knowledge I thought I'd ask you guys. What is the difference between a type-a vent and a type-l vent? I've done google searches but haven't got a definate answer yet.

I don't know if it's the material the vent is made out of or if a type-a vent goes straight up through the roof and a type-l vent has a horizontal section on it.

Anybody know?
 

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