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Scozz554 OP t1_ispwtbu wrote

Reply to comment by statikuz in 6 inch furnace vent. Can I use two elbows in place of a real cap? by Scozz554

Yeah I imagined a u would be not code, but it could keep things dry until I got a proper one up. Nothing is available locally and things are expected to be wet and below freezing in the next few days. I can find 5" all day. I could reduce to it but that feels more wrong than my u-vent.

Just trying to get something up before I'm no longer willing to be on my roof.

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thblackdeth t1_isqig14 wrote

If it's just capped off (no flow) there is no functional difference between reduced or not. Diameter is to allow more airflow

Edit: misread the post, I saw cap, not vent cap. Disregard

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statikuz t1_isr3bp6 wrote

> If it's just capped off (no flow)

Wait, nobody is talking about literally capping it off...

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Scozz554 OP t1_issy8pg wrote

Dear reddit. What's the best way to plug up my furnace exhaust for the winter? I'd like to spend less on my heating bill.

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