Panasonic 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W)

Panasonic 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W) is a 1-ton 4-star inverter split AC with an ISEER of 5.2 and a rated cooling capacity of 3,450 W. Panasonic gives a 10-year warranty on the compressor and it uses R32 refrigerant. It is one of 10 Panasonic air conditioners and 121 air conditioners compared on Comparezi.

Panasonic 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W) at a glance

• Type: Split
• Capacity: 1 ton
• BEE star rating: 4 star
• ISEER: 5.2
• Inverter: Yes
• Cooling capacity (rated): 3,450 W
• Annual energy (BEE label): 514 kWh
• Condenser coil: Copper
• Refrigerant: R32
• Indoor noise (lowest): 32 dB
• Compressor warranty: 10 years
• Model number: CS/CU-NU12BKY4W

Cooling and energy use

BEE rates it 4 star. Its ISEER (Indian Seasonal Energy Efficiency Ratio, the figure behind the BEE stars) is 5.2; a higher ISEER means less electricity for the same cooling over an Indian summer. The BEE label puts annual consumption at 514 kWh, measured on the standard 1,600 hours of use; your bill depends on your hours, thermostat setting and tariff. Rated at full load: 3,450 W of cooling. The inverter compressor changes speed instead of switching on and off, which is why inverter ACs use less power over a long evening. Panasonic says it keeps cooling at outdoor temperatures up to 55 °C. Convertible modes: 8-in-1 (it can run at lower capacity to save power when the room needs less).

Build and features

Condenser coil: Copper. Refrigerant: R32. The lowest indoor noise Panasonic states is 32 dB. Filters: PM0.1 Filter. It connects to Wi-Fi for app and voice control. It has a self-clean function.

Warranty

Panasonic states a warranty of 1 year on the product and 10 years on the compressor. Terms as written: 1 year on product, +4 years on PCB and +9 years on compressor.. Installation is usually charged separately; check with the brand before you buy.

How the Panasonic 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W) compares

Of the 25 about 1-ton split ACs on Comparezi with a stated ISEER, 10 have a higher ISEER. Of the 22 about 1-ton split ACs on Comparezi with a BEE annual energy figure, 9 use less energy a year. Of the 19 about 1-ton split ACs on Comparezi with a stated indoor noise level, 8 are quieter and 6 are level with it.

Similar 1-ton ACs from other brands

• O General 1 Ton 4 Star Inverter Split AC (ASGG12CGAA-B): 1 ton, 4 star, ISEER 5.04 (compare with the 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W))
• Carrier 1 Ton 5 Star Inverter Split AC (CAI12PE5R36W0): 1 ton, 5 star, ISEER 5.6 (compare with the 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W))
• Hitachi 1 Ton 5 Star Inverter Split AC (RAS.V512PCDIST): 1 ton, 5 star, ISEER 5.6 (compare with the 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W))
• Voltas 1 Ton 5 Star Inverter Split AC (125INV Vectra Zen Silver): 1 ton, 5 star, ISEER 5.6 (compare with the 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W))

Other Panasonic air conditioners

• Panasonic 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W): 1 ton, 5 star, ISEER 5.8 (compare)
• Panasonic 1 Ton 3 Star Inverter Split AC (CS/CU-SU12BKY3T): 1 ton, 3 star, ISEER 4.5 (compare)
• Panasonic 1.5 Ton 4 Star Inverter Split AC (CS/CU-NU18BKY4WX): 1.5 ton, 4 star, ISEER 5.2 (compare)

See every Panasonic product on Comparezi.

Sources

• Brand store page (store.in.panasonic.com)
• Brand store page (store.in.panasonic.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.