Ok, I duct taped my shop vac motor to the top of the chimney and used my homade manometer to take some measurements at the base of the stack..
Fan on, primary and secondary inlets blocked off: 0.9" wc
Fan on, primary air inlet open: Not measurable
Fan on, secondary air inlet opem: 0.1" wc
So it appears that the unit flows quite well. I'll use these measurements to select a fan......
Fan on, primary and secondary inlets blocked off: 0.9" wc
Fan on, primary air inlet open: Not measurable
Fan on, secondary air inlet opem: 0.1" wc
So it appears that the unit flows quite well. I'll use these measurements to select a fan......