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Old 12-28-2011, 12:38 PM   #1
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Furnace connector rise?


I need to move the vent from my furnace to a new location. It is a The Bryant 396HAD Induced-Combustion, 78%, Gas Furnace. What is the minimum rise needed before the first 45 degree bend. It is in the basement, the only appliance on the type b vent. It needs to rise up - bend 45, run horizontal for about 4 feet, bend again and then go straight up 20 feet through the roof.

The way it is set-up now is no reference as it is a complete "hack" - and it is why I need to change it.

Thank you in advance for any advise
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Old 12-28-2011, 03:50 PM   #2
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Furnace connector rise?


No minimum rise that I know of. The main thing is to vent it using B vent from the furnace to the chimney as single wall vent allow the fumes to cool down 2 much and can condense in the venting or chimney.
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Old 12-28-2011, 05:36 PM   #3
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Furnace connector rise?


I have only seen a required height requirement on a vent one time and I think it was on a PVC off a 90% furnace.
YURI is right you want "B" vent from the furnace and it wouldn't hurt anything if you had a 1" rise on that 4' length too.
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Old 12-28-2011, 06:09 PM   #4
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Furnace connector rise?


Yep. you do need some rise on the horz pipe, 1" at least.
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Old 12-28-2011, 06:46 PM   #5
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Furnace connector rise?


Quote
It is in the basement, the only appliance on the type b vent. It needs to rise up - bend 45, run horizontal for about 4 feet, bend again and then go straight up 20 feet through the roof.

Doesn't this mean that what he calls horizontal is already rising at a 45 degree angle?
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Old 12-28-2011, 07:30 PM   #6
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Furnace connector rise?


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It is in the basement, the only appliance on the type b vent. It needs to rise up - bend 45, run horizontal for about 4 feet, bend again and then go straight up 20 feet through the roof.

Doesn't this mean that what he calls horizontal is already rising at a 45 degree angle?
Quite right and it would be more than an inch which is good.
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Old 12-28-2011, 07:32 PM   #7
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Furnace connector rise?


Now my head hurts thinkin about it. Will have to talk to my cousin Jethro about dem der matheematics. 1 gizinta two gizinta.
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Old 12-28-2011, 07:44 PM   #8
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Furnace connector rise?


set your rise at 1/4" per foot min to 1st 45...then continue with your plan....will work fine..
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