When comparing heat pump specifications, the refrigerant type is often listed but rarely explained. Yet the refrigerant fundamentally determines what temperatures the heat pump can achieve, how environmentally responsible it is, and what regulations apply to it. This guide explains every refrigerant used in Sunniva's product range.
R410A — Residential and Light Commercial
• Used in: Sunniva All-in-One, Monoblock, Swimming Pool series
• Max outlet water temperature: 60°C
• GWP (Global Warming Potential): 2,088 (being phased down under Kigali Amendment)
• Best for: residential hot water, swimming pools, light commercial applications
R407C — Commercial Heat Pumps
• Used in: Sunniva Commercial SE-AH series
• Max outlet water temperature: 60°C
• GWP: 1,774 (lower than R410A, same phase-down timeline)
• Zeotropic blend — small temperature glide during phase change
R134a — High Temperature Applications
• Used in: Sunniva High Temperature SE-HT series
• Max outlet water temperature: 80°C
• GWP: 1,430 | Critical temperature: 101°C — allows condensation at 75–80°C
• Best for: industrial process heating up to 80°C, commercial laundry, industrial kitchens
R245fa — Ultra High Temperature Applications
• Used in: Sunniva Ultra High Temperature SE-UHT series
• Max outlet water temperature: 120°C
• GWP: 1,030 | Critical temperature: 154°C — enables condensation at 110–120°C
• Non-flammable, low toxicity — approved for food and pharmaceutical environments
• Best for: pharmaceutical sterilisation, textile dyeing, food processing above 80°C
R1234ze — Next Generation Super High Temperature
• Used in: Sunniva Super High Temperature SE-SHT series
• Max outlet water temperature: 90°C
• GWP: 7 (ultra-low — future-proofed against F-gas regulations)
• Critical temperature: 109°C
• Best for: large industrial heating where long-term refrigerant sustainability is a priority
Regulatory Context: Kigali Amendment
India ratified the Kigali Amendment in 2021, committing to phase down HFCs
(including R410A, R407C, R134a) by 80% by 2047. Sunniva's R1234ze-based Super HT series is already Kigali-compliant. For new long-term industrial investments, specifying low-GWP refrigerants today avoids future replacement costs.
R410A — Residential and Light Commercial
• Used in: Sunniva All-in-One, Monoblock, Swimming Pool series
• Max outlet water temperature: 60°C
• GWP (Global Warming Potential): 2,088 (being phased down under Kigali Amendment)
• Best for: residential hot water, swimming pools, light commercial applications
R407C — Commercial Heat Pumps
• Used in: Sunniva Commercial SE-AH series
• Max outlet water temperature: 60°C
• GWP: 1,774 (lower than R410A, same phase-down timeline)
• Zeotropic blend — small temperature glide during phase change
R134a — High Temperature Applications
• Used in: Sunniva High Temperature SE-HT series
• Max outlet water temperature: 80°C
• GWP: 1,430 | Critical temperature: 101°C — allows condensation at 75–80°C
• Best for: industrial process heating up to 80°C, commercial laundry, industrial kitchens
R245fa — Ultra High Temperature Applications
• Used in: Sunniva Ultra High Temperature SE-UHT series
• Max outlet water temperature: 120°C
• GWP: 1,030 | Critical temperature: 154°C — enables condensation at 110–120°C
• Non-flammable, low toxicity — approved for food and pharmaceutical environments
• Best for: pharmaceutical sterilisation, textile dyeing, food processing above 80°C
R1234ze — Next Generation Super High Temperature
• Used in: Sunniva Super High Temperature SE-SHT series
• Max outlet water temperature: 90°C
• GWP: 7 (ultra-low — future-proofed against F-gas regulations)
• Critical temperature: 109°C
• Best for: large industrial heating where long-term refrigerant sustainability is a priority
Regulatory Context: Kigali Amendment
India ratified the Kigali Amendment in 2021, committing to phase down HFCs
(including R410A, R407C, R134a) by 80% by 2047. Sunniva's R1234ze-based Super HT series is already Kigali-compliant. For new long-term industrial investments, specifying low-GWP refrigerants today avoids future replacement costs.