Heating performance comparison of R410A and its substitutions in air-to-water heat pumps with vapor injection

•The capacities of R452B and R447B are 0.7–5% and 6–15% lower than those of R410A.•The attenuation with the ambient temperature of R452B is slower than that of R410A.•The COPs of R452B and R447B are higher than those of R410A.•The optimal injection pressure ratio is 0.35–0.45.•R452B and R447B are mo...

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