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CarFix Garage Offers R744 Car Air Con Regassing and Servicing

As R744 is still not widely used we are one of the few air-conditioning service companies that has invested in the necessary equipment to be able to offer this service.

Your air-conditioning system purifies and dehumidifies the air inside your car, as well as keeping the cabin temperature at the desired level. Air conditioning systems lose gas pressure as they are used, reducing output and causing your air conditioning system components to work harder and become less efficient. R744 CO2, R134A, HFO1234yf.

R744 is a refrigerant grade of CO2 gas and is used in car air conditioning systems as a replacement for R134a and R1234yf gases. It is becoming increasingly popular due to its strong “green” credentials. With an Ozone Depleting Potential (ODP) rating of 0 and Global Warming Potential (GWP) of 1, it is seen as an excellent gas to be used by car manufacturers.

R744 is the refrigerant name for carbon dioxide, which first appeared in high-end cars from German brands including Mercedes-Benz and Volkswagen Group on the European market.

CO2 requires operating pressures up to ten times higher than R134a. Although it has been used for some time in stationary equipment, getting R744 systems to work for automotive applications has been a significant engineering challenge, with unique components and system layouts required for this refrigerant.

The high pressures involved bring their own safety considerations when working on R744 systems.

As a result, working with R744 will require new service equipment meeting the relevant SAE standards, as well as technical training about the major differences.

The decision by some automotive manufacturers to adopt R744 came from flammability concerns about R1234yf, particularly Mercedes-Benz parent company Daimler. Mercedes-Benz was first to market with R744 systems in the S-Class but has since dropped it from internal combustion vehicles.

Volkswagen Group’s Audi A8 and electric vehicles based on the MEB platform also use R744 on certain variants sold on the European market.

CarFix Garage provides Air Con servicing London on different systems, including R134A, HFO1234yf and CO2 R744.

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