Between ₹40,000 and ₹50,000 you are buying one of three upgrades over the best-value 1.5 ton units: 5-star efficiency, built-in smart features, or winter heating. This page ranks all of them, so decide which one you actually need before choosing.
For efficiency, Lloyd's GLS18V5AGGGW (₹45,990, ISEER 5.75) and Haier's HSU19K (₹45,000, ISEER 5.05 with 5,460 W and a 12-year compressor warranty) are the cheapest 5-star 1.5 ton units here. For smart control with energy caps, Blue Star's IA518GXUS at ₹49,990. For heating, Samsung's AR50H19C1XH at ₹45,490 or Voltas' 183INVHC at ₹41,000.
Compare ISEER before the star count. ISEER is the cooling an AC delivers per unit of electricity across a typical Indian season, and the star is cut from it — so two 5-star units on this page can still differ by a fifth in what they cost to run. Where a brand does not publish ISEER or annual units, we say so on the product, because that silence is information too.