Split ACs in India: tonnage, BEE stars and inverter truth

The split AC is now India’s default serious cooling purchase, and the label to learn is the BEE star rating with its ISEER number (Indian Seasonal Energy Efficiency Ratio — tested across India’s actual temperature distribution up to 43 °C+). The star bands tighten regularly, so a 3-star of today outperforms a 5-star of a decade ago; compare ISEER values directly, not star counts across years. A 5-star 1.5-ton inverter typically runs an ISEER above 5.0.

Tonnage follows room size and city: the working rule is roughly 0.8 ton to ~10–11 m², 1 ton to ~13–15 m², 1.5 tons to ~18–22 m², 2 tons above — then add margin for top-floor rooms, west windows and the 45 °C cities of the plains, where condensers must keep working at temperatures that would shut down lesser units (check the rated operating range; 50–52 °C figures on Indian-market models are not marketing, they are necessary). Inverter compressors have won the market for a reason: they modulate instead of slamming on and off, cutting seasonal consumption 20–40% versus fixed-speed at Indian duty cycles.

Frequently asked questions

Do I still need a voltage stabilizer?

Most current inverter ACs specify wide operating voltage (roughly 130–280 V on many models) with built-in protection, so in metros with stable supply a separate stabilizer is often unnecessary. In areas with severe swings or frequent brownouts, a stabilizer remains cheap insurance — check the manufacturer’s stated range against your reality.

What does a good split AC cost in India?

Indicative 2026 ranges: ₹30,000–₹45,000 for a 1-ton 3-star inverter, ₹35,000–₹60,000 for a 1.5-ton across 3–5 star bands, before installation charges (typically ₹1,500–₹3,000 plus materials). Festival-season discounts are real. Reference ranges, not quotes.

By city and by brand

Dry or humid — the verdict for 40 Indian cities. Brands: ACs and coolers compared. Sizing: tonnage rules.

Other equipment types: Air cooler · Window AC.