Blue Star 1.5 Ton 5 Star Inverter Window AC (WIA518LXU)

Blue Star 1.5 Ton 5 Star Inverter Window AC (WIA518LXU) is a 1.5-ton 5-star inverter window AC with an ISEER of 3.73 and a rated cooling capacity of 5,070 W. Blue Star gives a 10-year warranty on the compressor and it uses R32 refrigerant. It is one of 15 Blue Star air conditioners and 121 air conditioners compared on Comparezi.

Blue Star 1.5 Ton 5 Star Inverter Window AC (WIA518LXU) at a glance

• Type: Window
• Capacity: 1.5 ton
• BEE star rating: 5 star (2026 label)
• ISEER: 3.73
• Inverter: Yes
• Cooling capacity (rated): 5,070 W
• Power input (rated): 1,550 W
• Annual energy (BEE label): 1053.51 kWh
• Condenser coil: Copper (with anti-corrosion coating)
• Refrigerant: R32
• Indoor noise (lowest): 53 dB
• Compressor warranty: 10 years
• Model number: WIA518LXU

Cooling and energy use

BEE rates it 5 star on the 2026 table. Its ISEER (Indian Seasonal Energy Efficiency Ratio, the figure behind the BEE stars) is 3.73; a higher ISEER means less electricity for the same cooling over an Indian summer. The BEE label puts annual consumption at 1053.51 kWh, measured on the standard 1,600 hours of use; your bill depends on your hours, thermostat setting and tariff. Rated at full load: 5,070 W of cooling and 1,550 W of power input. The inverter compressor changes speed instead of switching on and off, which is why inverter ACs use less power over a long evening. Blue Star says it keeps cooling at outdoor temperatures up to 52 °C. Convertible modes: 5-in-1 (it can run at lower capacity to save power when the room needs less).

Build and features

Condenser coil: Copper (with anti-corrosion coating). Refrigerant: R32. The lowest indoor noise Blue Star states is 53 dB.

Warranty

Blue Star states a warranty of 1 year on the product and 10 years on the compressor. Terms as written: Standard Warranty of 1 Year from the date of installation, on the entire range of Window ACs, Fixed Speed Split ACs, Inverter Split ACs .... Installation is usually charged separately; check with the brand before you buy.

How the Blue Star 1.5 Ton 5 Star Inverter Window AC (WIA518LXU) compares

Of the 9 about 1.5-ton window ACs on Comparezi with a stated ISEER, 2 have a higher ISEER. Of the 9 about 1.5-ton window ACs on Comparezi with a BEE annual energy figure, 2 use less energy a year. Of the 7 about 1.5-ton window ACs on Comparezi with a stated indoor noise level, 5 are quieter and 1 is level with it.

Similar 1.5-ton ACs from other brands

• Godrej 1.5 Ton 5 Star Inverter Window AC (AC 1.5T TR WIC 18F5TG WA): 1.5 ton, 5 star, ISEER 3.75 (compare with the 1.5 Ton 5 Star Inverter Window AC (WIA518LXU))
• Voltas 1.5 Ton 5 Star Inverter Window AC (185INV Topaz): 1.5 ton, 5 star, ISEER 3.7 (compare with the 1.5 Ton 5 Star Inverter Window AC (WIA518LXU))
• LG 1.5 Ton 5 Star Inverter Window AC (AW-Q18WUZA): 1.5 ton, 5 star, ISEER 3.81 (compare with the 1.5 Ton 5 Star Inverter Window AC (WIA518LXU))
• Whirlpool 1.5 Ton 3 Star Inverter Window AC (MAGICOOL 15T 3S INV WAC W6O2PP0): 1.5 ton, 3 star, ISEER 3.45 (compare with the 1.5 Ton 5 Star Inverter Window AC (WIA518LXU))

Other Blue Star air conditioners

• Blue Star 1.5 Ton 5 Star Inverter Split AC (IA518IXUS): 1.5 ton, 5 star, ISEER 5.63 (compare)
• Blue Star 1.5 Ton 5 Star Inverter Split AC (IA518ZXUS): 1.5 ton, 5 star, ISEER 5.63 (compare)
• Blue Star 1.5 Ton 5 Star Inverter Split AC (IA518DXU): 1.5 ton, 5 star, ISEER 5.7 (compare)

See every Blue Star product on Comparezi.

Sources

• Brand page (consumer.bluestarindia.com)
• Brand page (consumer.bluestarindia.com)

Checked 18 October 2026. Figures the brand does not state are left out rather than estimated. Prices on this page come from dated store checks, not from this text. See how Comparezi checks data.