🔧 1. Why CO₂ (R744)?

Carbon dioxide (R744) is a natural, non-flammable gas with zero ozone depletion potential (ODP = 0) and a very low global warming potential (GWP = 1). This means that in terms of ecology, CO₂ outperforms both R134a (GWP = 1300) and R1234yf (GWP = 4).

🌱 2. Environmental and technical benefits

• Minimal impact on the climate: Thanks to GWP = 1, CO₂ emissions from the AC system are marginal.
• Energy efficiency: CO₂ systems cool the interior of the car faster and with lower energy consumption than R134a or R1234yf systems, as confirmed by tests conducted by ADAC and German agencies.
• Versatility: The system can act as a heat pump, heating the vehicle in winter.

🔩 3. Service challenges

• High operating pressures: R744 operates at an air pressure of around 120 bar, compared to 30 bar for R134a.
• Specialised workshop equipment:
  • Handling equipment must be designed for high pressure, precise filling (accuracy ±10 g) and CO₂ sensor monitoring.
  • High-quality pipes and heat exchangers resistant to pressures exceeding 130 bar are also required.

🛠 4. Stages of professional R744 service

1. Diagnostics and leak testing – checking the tightness of pipes, sensors and high-pressure components.
2. Extraction of old refrigerant and oil – using special equipment to prevent CO₂ from escaping into the atmosphere.
3. Component replacement – installation of dedicated compressors, heat exchangers and safety valves.
4. Filling and calibration – accurate to ±10 g, in accordance with the manufacturer’s instructions (e.g. Mercedes, Sanden).
   5. System performance test – checking operating parameters and monitoring CO₂ concentration for the safety of the service technician.

🚗 5. Examples from the market

• Since 2017, Mercedes has been introducing CO₂ air conditioning systems in its models.
• Compressor manufacturer Sanden has been supplying CO₂ system technology to Daimler (Mercedes) since May 2017.

💡 6. What does professional AC service mean for you?

• Added value for customers: the air conditioning service of the future – environmentally friendly, efficient and innovative.
• Investment in specialised equipment (e.g. ECO2KARE, KONFORT 744) will enable us to offer comprehensive servicing of R744 systems.
• An opportunity to position your company as a leader in environmentally friendly technologies that comply with future EU regulations.

Summary

CO₂ air conditioning service is not only a response to growing environmental requirements, but also an opportunity to develop premium services and stand out in the automotive market. With specific knowledge, precise equipment and experienced specialists, you can offer your customers air conditioning service that fits the new trend: ecological, efficient and safe.