With summer driving up demand for air conditioners across the country, consumers are being advised to pay closer attention to star ratings, manufacturing year and ISEER values while purchasing ACs, as revised energy efficiency norms introduced from January 1, 2026, promise better long-term savings on electricity bills. The Bureau of Energy Efficiency (BEE) has updated star rating standards for air conditioners for the 2026–2027 period, making new AC models nearly 10 per cent more energy-efficient than those manufactured in 2025 or earlier. Under the revised norms, a 5-star split AC manufactured in 2026 must have an ISEER value of 5.6, while a 5-star window AC must have an ISEER value of 3.7.
Industry experts said consumers should avoid directly comparing old and revised star labels, as many 2025 models may now effectively fall into a lower category under the new standards. A 2025-manufactured 5-star split AC with an ISEER value of 5.0, for instance, would now be considered equivalent to a 4-star AC. Manufacturers are also increasingly using advanced cooling technologies and copper heat exchangers to improve efficiency and durability. Copper-based heat exchangers are considered more suitable for India’s tropical climate due to better corrosion resistance, easier maintenance and longer lifespan compared to aluminium alloy microchannel systems.
In Kolkata, appliance dealers said demand for energy-efficient ACs has increased sharply ahead of peak summer, with buyers showing greater awareness about electricity savings and long-term maintenance costs. Retailers noted that premium 5-star AC models are witnessing strong interest despite slightly higher upfront prices, particularly among urban households looking to reduce monthly power expenses.