Passive Houses have very low heating and cooling loads because of R60 walls and ceiling, carefully placed triple glazed windows and minimal infiltration. Passive Houses do not recirculate air - fresh air comes in through the HRV, gets distributed, and then exhausted. It's very hard to appropriately size HVAC equipment for such a house. Mini-splits are attractive because their inverters let them work efficiently at very low levels. For energy savings you need to get by with just the fans on the HRV, and not run a standard air handler.
One strategy for cooling and dehumidifying such a house is to dump fresh air in a central hall way cooled by a mini-split, then use jump ducts from the hall way to the rooms and finally exhaust stale air from the rooms through the ducts back to the HRV. This is the opposite of what Lstiburek generally recommends where you push air into the rooms and exhaust using jump ducts to centralized collection points.
Does anyone see problems with using a central supply and ducted returns? Would this run afoul of any building codes?