Sanden Eco Heat Pump] Why employ R744 (CO2 ) refrigerant


Eco-Friendly - Why employ R744 (CO2 ) refrigerant?

✅ It offers no ozone layer depletion and minimal global warming (ie. as per table below) versus other commonly used refrigerants, should the system leak.

✅ It performs higher compression efficiency, with lower energy consumption, thereby allowing more heat to be transferred to the water, for less energy used (i.e. excellent thermodynamic ability).

✅ The refrigerant temperature gets very hot, very quickly, so water temperature of 65ºC, is achieved almost instantly.

✅ Sanden is the only currently available HWHP in Australia, to employ “ozone friendly” R744 (CO2) refrigerant.

Refrigerant ASHRAE Number IUPAC Chemical Name Net GWP per 100 years
R744 Carbon Dioxide 1
R12 Dichlorodifluoromethane 10,900
R22 Chlorodifluoromethane 1,810
R134a 1,1,1,2-Tetrafluoromethane 1,430
R410a R32/R125 (50/50) 2,087.5

Global warming potential (GWP)

Global warming potential (GWP) is a measure of how much a given mass of greenhouse gas is estimated to contribute to global warming. It is a relative scale which compares the gas in question to that of the same mass of carbon dioxide (whose GWP is by convention equal to 1). A GWP is calculated over a specific time interval and this time interval must be stated whenever a GWP is quoted or else the value is meaningless.

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