what is the primary reason double wall is used outside the house for woodstove piping? Why can't we use single wall throughout the entire length? Or is it a preference?
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Piping quetion
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Insulated pipe outside the house will keep the smoke from cooling too fast. If it cools too fast, you won't get good draft but you will get good creosote.
^^^what he said. If that pipe was subjected to a nice frosty winter day, you would have creosote ice cubes to play with.
You can't pass single-wall pipe through a wall or ceiling penetration...it's a CTC issue. At that point you transition properly from whatever connector pipe (stovepipe) you're using to Class A (insulated) chimney for the rest of the run to daylight. Rick
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