Quick question regarding vent lengths


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Old 08-14-13, 03:30 PM
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Quick question regarding vent lengths

this maybe a dumb question... but I am looking to install a rheem tankless water heater and it says in the manual the max length of the vent using 3" pipe and with four 90 degree elbows is 33.5 feet. Does this mean the intake and exhaust can each be 33.5 feet or does it mean the intake and exhaust collectively need to be 33.5 feet in length?
 
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Old 08-14-13, 07:58 PM
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I believe each may be up to 33.5 feet.
 
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Old 08-15-13, 10:10 AM
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This is what the manual says

This was from the manual.

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Old 08-15-13, 10:19 AM
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I read it as each pipe...not combined lengths. Quick call to Rheem should give you an answer.
 
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Old 08-15-13, 03:33 PM
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One more thing: Those elbows must be of the long radius type.
 
 

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