R744 - CO2

• Natural refrigerant with a wide temperature range

• Non-toxic and non-flammable

• Excellent choice for air-sourced heat pumps for direct use in the energy collectors and with high delta T on the heat sink side

• Optimal for medium-temperature water-sourced heat pumps, chillers and combined heating and cooling applications

• Medium-high temperature level on heat sink (up to 85°C supply temp) with high delta T on the heat sink (dT: 30-40K)

R600a - Isobutane 

• High-temperature natural refrigerant

• Suitable for water-sourced heat pumps and chillers

• Can be used in a wide temperature range on both the heat source and heat sink sides

• Robust operation under various operating conditions

• Use of efficient screw compressors and high COP of the cycle

• High temperature level on heat source (up to 40°C evap. temp)

• High temperature level on heat sink (up to 95°C supply temp) and ideal with low delta T on heat sink - serial coupling on water side at higher delta T

R290 - Propane

• Low-temperature natural refrigerant

• Suitable for lower temperature water-sourced heat pumps and chillers

• Low temperature level on heat source (down to -30 °C evap. temp)

• Medium temperature level on heat sink (up to 75 °C supply temp)

• Ideal with low delta T on sink and heat source

• High refrigeration capacity ensures compact solutions with small footprint

• Can be combined with isobutane in serial hydraulic couplings