July 01, 2025
The increasing demand for commercial air conditioning systems with low GWP makes Daikin’s new CO2 VRV the perfect choice to achieve BREEAM / LEED.
Daikin’s RXYN-B uses HFC-free refrigerant CO2 (R-744) with a low GWP of 1, making it one of the most sustainable refrigerants on the market.
It enables you to deliver projects requiring “natural” refrigerants: A non-flammable (A1) refrigerant, simplifying system design.
RXYN-B incorporates all typical VRV benefits:
- Quick and easy to design and install
- Precise zone control with quick response to changing load
- Connectable to Daikin’s latest controllers such as Daikin Cloud Plus.
Benefits of CO2 R-744
- R-744 is a “natural” refrigerant
- Low GWP value of 1, making it one of the most sustainable refrigerants
- Classified as non-flammable (A1), simplifying system design.
Benefits of CO2 VRV
- Enables you to deliver projects requiring “natural” refrigerants
- Maximise your BREEAM / LEED refrigerant score, thanks to the low GWP of 1
- BREEAM V7: 3 of 3 credits in Pollution 01
- LEED V5: 2 of 2 points in Enhanced Refrigerant Management
Roundflow Cassette for CO2 VRV R-744

Newly designed for the new CO2 VRV, is Daikin’s Roundflow ceiling cassette, FXFN-B.
Available in white or black, with or without the self-cleaning panel, the FXFN-B delivers 360° air discharge for optimum efficiency and comfort.
Features include:
- Floor and presence sensor
- Auto-cleaning filter
- A range of decoration panels: designer panels in white (RAL9010) and black (RAL9005) and standard panels in white (RAL9010) with grey louvres or full white
- Optimised design for CO2 refrigerant (R-744)
- Bigger flaps and unique swing pattern, and individual flap control
- Lowest installation height in the market: 214mm for class 20-63
- UV streamer kit - purifies the air of pollutants such as viruses, bacteria, fine dust (PM1.0), odours, allergens, etc.
- Optional fresh air intake
- Standard drain pump with 675mm lift
Concealed Ceiling Unit for R-744

Again, redesigned for R-744, Daikin’s CO2 VRV Concealed ceiling unit - FXSN-B - is the slimmest, most powerful medium static pressure unit on the market.
- Only 245mm (300mm built-in height)
- Quiet operation: down to 25dBA
- Medium external static pressure up to 150Pa facilitates using flexible ducts of varying lengths
- Possibility to change ESP via wired remote control allows optimisation of the supply air volume
- Discretely concealed in the wall: only the suction and discharge grilles are visible
- 15 class unit, developed for small or well-insulated rooms such as hotel bedrooms or small offices
- Optional fresh air intake
- Fresh air intake integrated in the same system
- Standard built-in drain pump with 625mm lift.
Please get in touch for further technical support or to discuss any low GWP applications.
DOWNLOAD DAIKIN CO2 VRV BROCHURE