Burner Air Supply - Negitive Pressure Home

taglaser62

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?

Buckeyetech

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

taglaser62

yes i see it there. should I pipe it to outside? what is benefit?

bigMikeB

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