VRF Fresh Air Indoor Units

Conditioning outdoor air through VRF

A VRF fresh air indoor unit cools or heats incoming outdoor air before supplying it to the building. Unlike a recirculating indoor unit, it operates against the full outdoor air load. It can support ventilation design in offices, hotels, clinics, restaurants and other occupied buildings.

Ventilation load requires a separate calculation

Fresh air volume is determined from occupancy, room use, operating schedule and applicable ventilation requirements. Outdoor temperature and humidity create additional summer load, while low winter temperature increases heating demand. These conditions must be included in outdoor unit selection and the permitted connection ratio.

Not the same as an AHU connection kit

A fresh air indoor unit is a complete factory assembled product. An AHU expansion valve and control kit is used to connect a separate air handling unit to a VRF circuit. This category includes only complete fresh air units and excludes control panels and connection kits.

Air volume, filtration, external static pressure, drainage and frost protection are checked from the selected model data. Euroclima evaluates the unit together with the ventilation load and the complete VRF design.