New one for me today. 2-story, 4000 s.f. built in 2002. All static vents in attic have been very neatly sealed off. Two of the former static vents (now with sealed covers) have a six-inch flexible metal duct attached and the bottom end of the duct is hanging near the attic decking floor level. Two "power vents" (thermostatically controlled) had also been installed ... only one was working the motor was toast on the other. BTW - I dislike power vent fans as i can't wrap my head around spending money on electricity to "save money on electricity" to move air from an attic in the summer. The static vents work just fine ... no moving parts, no electricity, etc.. Anyway ... I'm not sure what the former homeowner was trying to do as I've not run across such. Anyone else seen such? Sealed static vent port Click to Enlarge 49.32 KB Sealed static vent port with 6-inch flexible attached Click to Enlarge 42.5 KB Bottom of flexible at attic floor deck level Click to Enlarge 81.77 KB