Furnace exhaust slope

Old 10-15-14, 10:22 AM
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Furnace exhaust slope

I understand the vent of a high effiency furnace is supposed to slope back toward the furnace so condensate runs back to the furnace.

However, is the air intake also supposed to slope back toward the furnace the same way?
Old 10-16-14, 05:09 PM
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If you have a 2 pipe application, yes both should slope back to the furnace.

Refer to the installation manual of your furnace.

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