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Old 12-20-2007, 08:31 PM   #1
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Burner Air Supply - Negitive Pressure Home


I have a Rheem 90 high efficiency furnace. I have been told that it creates a negitive pressure in the home when it sucks air out of the home for combustion and then blows it outside via the exhaust. I understand this and can believe what I'm told. Here is the question: should I run an air supply tube from outside to my furnace so that home air pressure is neutral? pros & cons please?

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Old 12-20-2007, 08:47 PM   #2
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Burner Air Supply - Negitive Pressure Home


Most 90 percenters have two pvc pipes going into the furnace. One is the air intake and the other is the flue gas exhaust.

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Old 12-20-2007, 08:50 PM   #3
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Burner Air Supply - Negitive Pressure Home


yes i see it there. should I pipe it to outside? what is benefit?
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Old 12-22-2007, 08:06 PM   #4
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Burner Air Supply - Negitive Pressure Home


Not using inside air for combustion is the benefit. Outside air for combustion makes less carbon monoxide than using inside air. Pipe it outside.
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