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1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W) vs 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W)

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Quick verdict

  • 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W) is better for low electricity bills.
  • 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W) leads on overview.
  • 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W) leads on cooling and efficiency.
  • 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W) offers better overall value (20.9 points per ₹10,000).
  • 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W) has the higher Comparezi Score (85.6).
  • 1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W) is the cheaper option at ₹37,990.

Computed from stored specifications, the published air conditioners scoring rules and recorded prices. Not an opinion.

Winners by area

Overview 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W)
Cooling and efficiency 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W)
Value 1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W)

Specifications side by side

Spec
1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W)
1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W)
Overview
Type
Split
Split
Capacity
1 ton
1 ton
Energy rating
4 star
5 star (better)
Inverter compressor
Yes
Yes
Model number
CS/CU-NU12BKY4W
CS/CU-NU12BKY5W
Launched
2026
2026
Cooling and efficiency
ISEER
5.2 W/W
5.8 W/W (better)
Cooling capacity
3,450 W
3,450 W
Annual energy use
514 kWh/year
460.65 kWh/year (better)
Cools at outdoor temperature up to
55 °C
55 °C
Convertible modes
8-in-1
8-in-1
Build
Condenser coil
Copper
Copper
Copper condenser
Yes
Yes
Refrigerant
R32
R32
Noise level
32 dB
32 dB
Features
Wi-Fi / app control
Yes
Yes
Filters
PM0.1 Filter
PM0.1 Filter
Self-clean
Yes
Yes
Colours
White
White
Warranty
Product warranty
1 year
1 year
Compressor warranty
10 years
10 years
Warranty terms
1 year on product, +4 years on PCB and +9 years on compressor.
1 year on product, +4 years on PCB and +9 years on compressor.

A tick marks the better value where the category rules say higher (or lower) is better. Text values are shown without a winner. Ties have no winner.

Price and availability

Store links are not paid: prices are copied from each store's own page with the date checked, and Comparezi earns only from labelled ads. How we earn

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

₹37,990

1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W)

₹40,990

Pros and cons

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

  • Pro: Wi-Fi control from a phone app

1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W)

  • Pro: ISEER of 5.8, higher than 96% of the 25 1-ton split ACs on Comparezi that state it
  • Pro: BEE-label energy use of 460.7 kWh a year, lower than 95% of the 22 1-ton split ACs on Comparezi that state it
  • Pro: Wi-Fi control from a phone app

Which should you buy?

1 Ton 5 Star Inverter Split AC (CS/CU-NU12BKY5W) if you want the strongest overall specification: it has the higher Comparezi Score (85.6).

1 Ton 4 Star Inverter Split AC (CS/CU-NU12BKY4W) if price matters most: it is the cheaper option at ₹37,990.

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