The system will supply fresh air that is controlled at a constant temperature and humidity. This will make for the flow of fresh clean healthy air at comfortable temperatures. The unit has F9 (PM2.5) particulate filtration along with Carbon filtration and a G4 Pre filter (dust filter) to ensure the best quality fresh air is entering your home. So now we have a complete ventilation system that also heats and cools and controls humidity. The Heat Pump FAS does not require an outdoor unit. This is a great advantage for apartment developments with limited space for outdoor AC units, there is even a vertical mount model for installation into a cupboard (great for apartments with limited ceiling space). These also come in a Ceiling Mount model for low energy single storey housing, the units are typically installed inside the ceiling space and ducted throughout the rooms.