Among the four air conditioners, the efficiency of the
R410A A/C which had the same appearance size as
the R22 baseline A/C was about 3% higher than that
of the R22 A/C. The efficiency of the high-efficiency
R410A A/C was about 12% higher than that of R22
A/C. Meanwhile, it was found that with the decreasing
of ambient temperature, R410A A/C could be more
and more efficient than the counterpart R22 A/C.