It does 5 full (filtered) air exchanges with outside air per hour. There are a further ~10 full circulations of internal air through the full filtering system.

It does 5 full (filtered) air exchanges with outside air per hour. There are a further ~10 full circulations of internal air through the full filtering system. That level of air movement remains comfortable because we have a lot of ducting (we detailed in a lot of grilles, not just one single one per room) so it is a low-velocity high throughput system. You never get a lot of air blowing out of one place, but you get a lot of placed blowing a little air.