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Can I run draft furnace exhaust up the ouside wall if it is enclosed using double wall pipe?

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asked in Heating System by ronaldb (120 points)
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1 Answer

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Hi Ronald,
You mean that the double wall vent pipe would run inside a chase attached to the exterior wall of your house? Yes you can for as long as you keep proper clearances along the entire run and clear the roof by as much as it is required for your particular installation. 
I answered a question concerning installation of a furnace vent pipe on an exterior wall here - http://checkthishouse.com/qa/865/installing-a-chimney-outside-of-house - and you can follow the link at the end of that answer to calculate the dimensions and to get clearance requirements. You may also go over my post here – http://checkthishouse.com/2418/gas-appliance-chimney-placement-and-termination.html for some pictures explaining those clearances.
As always, check with your local building department code enforcement division for restriction in your area.
answered by darekrudy (21,730 points)