Why do Daikin ACs at the same tonnage have different ISEER values?

Different series use different compressor and coil designs even at the same rated capacity. A real example: at 1.5 Ton, FTKF50 reaches ISEER 6.30, while eight other 5-star series (JTKJ, FTKU, FTKM, FTKR, GTKM, GTKU, MTKM, ATKM) all sit at 5.70 — same tonnage, same star rating, genuinely different efficiency.

📐 Calculated estimate Based on real BEE-certified data — see the exact numbers below.

Star rating is a banded range, not a single number — multiple different ISEER values can fall in the same 5-star band. Two models can carry an identical star badge while one is meaningfully more efficient than the other; checking the actual ISEER figure (not just the star count) is the only way to see this real difference.