TAMNOZ wrote:Understood, but since I have direct vent draft is not an issue. Also, since the opening in the side of the fan is only about 2" in diameter do I only need to feed it with that size or should I go 3" or 4" pipe?
Draft is always an issue that should be measured, be it natural draft or forced exhaust (DV or PV). During the burning season fly ash can build up over time and reduce the draft. The make up air would be supplied to the combustion blower. When your combustion blower isn't feeding the fire, the DV is pulling air in through the gate used to regulate combustion air.
Do the direct vents come with a rheostat to control the draft? I know the SWG PV does.
Check out homesaver
's pic from earlier in this thread.