🏆 Best 1 Ton AC
Hitachi 1 Ton 5 Star Yoshi Inverter Split AC RAS.V512PCDIST
Hitachi
8.3/10
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- 1 ton
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Small bedrooms run for long nights, including top-floor rooms
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🧊 Air conditioner
Brand: Blue Star
Blue Star 0.8 Ton 3 Star Inverter Split AC IA309TNU
The lowest-priced inverter split on our list
8.0/10
Our editorial score
Very good — recommended
Small rooms of up to about 100 sq ft
- Capacity
- 0.8 ton
- Energy rating
- 3 star · ISEER 3.9
- Type
- Split, inverter
- Compressor warranty
- 10 years
About this air conditioner
- 10-year compressor warranty and 5-year PCB warranty
- 5-in-1 convertible — runs as a smaller AC on mild nights and draws less power
- 28 dB(A) at its lowest fan speed — quiet enough for a bedroom
- One of the lowest prices on our list for a 1 ton 3-star split AC
How it scores
Cooling performance7.5
Build & coil quality8.6
Value for money9.1
Electricity cost6.7
Installation & service8.8
Our verdict
At ₹27,990, this is the least expensive inverter split AC we compare, and it keeps the features that matter: five convertible steps, a quiet 28 dB(A) lowest fan speed, 544 declared units a year, a copper condenser with blue fins and 10 and 5 years of compressor and PCB warranty. Wi-Fi is a ₹1,699 add-on.
It is a 0.8 ton unit with 2,740 W of rated cooling, which limits it to rooms of about 100 sq ft. Buying it for a 130 sq ft bedroom to save ₹5,000 over a 1 ton is a false economy.
What we like
- 10-year compressor warranty and 5-year PCB warranty
- 5-in-1 convertible — runs as a smaller AC on mild nights and draws less power
- 28 dB(A) at its lowest fan speed — quiet enough for a bedroom
- One of the lowest prices on our list for a 1 ton 3-star split AC
What we don't
- ISEER 3.9 is low for an inverter split — expect noticeably higher bills than a 5-star unit
- 2,740 W rated cooling is 22% below a true 1 ton (3,517 W), so size it for a smaller room
- Wi-Fi is not built in: wi-fi and voice control need a ₹1,699 add-on
Full specifications
| Type | Split AC, inverter compressor |
|---|---|
| Model code | IA309TNU |
| Capacity | 0.8 ton — 2,740 W rated cooling |
| Energy rating | 3 star (2025 BEE label) |
| ISEER | 3.9 |
| Annual energy use | 544 units/year declared (BEE 1,600-hour season) ≈ ₹4,352 at ₹8/unit |
| Refrigerant | R32 |
| Condenser | Copper |
| Coil protection | anti-corrosive Blue Fins |
| Rated ambient | Cools up to 52°C outdoors |
| Convertible modes | 5-in-1 |
| Wi-Fi | Wi-Fi and voice control need a ₹1,699 add-on |
| Indoor noise | 28 dB(A) at the lowest fan speed |
| Warranty | 10 years on the compressor and 5 years on the PCB, as listed by Blue Star |
| Price source | Blue Star official store, checked 2026-09-14 |
Specifications are from manufacturer literature and were checked at the last price-verification date. Brands occasionally revise stage counts, tank sizes and warranty terms without changing the model name — confirm against the current listing before purchasing.
About Blue Star
India's strongest commercial-refrigeration engineering house, now selling domestic refrigerators too. The commercial heritage is the point: Blue Star's deep freezers, visi-coolers and glass-door merchandisers are the default choice for Indian shops and restaurants, and the domestic range inherits that build discipline. For a shop, a clinic or a restaurant, this is usually the first brand to call.
Service: very goodPrice band: midHQ: Mumbai, Maharashtra
Blue Star 0.8 Ton 3 Star Inverter Split AC IA309TNU — frequently asked questions
What room size is the Blue Star IA309TNU suitable for?
Rated at 2,740 W, it suits a middle-floor room of up to about 100 sq ft with a 10 ft ceiling, or about 70 sq ft on a top floor with strong afternoon sun. Each person beyond two adds load, and a room open to a kitchen needs more. Our AC tonnage calculator works this out for your exact room.
How much electricity does the Blue Star IA309TNU use?
Its BEE label declares 544 units a year, measured over a 1,600-hour cooling season — about 5 hours a day for 11 months, or 8 hours a night for 6-7 months. At ₹8 a unit that is roughly ₹4,352 a year, at an ISEER of 3.9. Real use varies with room size, set temperature and how hot your summer is; setting 24-26°C rather than 18°C cuts it substantially.
What warranty does the Blue Star IA309TNU come with?
10 years on the compressor and 5 years on the PCB, as listed by Blue Star. Warranty on an inverter AC matters most for the compressor and the PCB, the two most expensive parts to replace, so check both are listed on your invoice and register the product with Blue Star after installation.
Where can I buy the Blue Star IA309TNU at the best price?
We list ₹27,990 from Blue Star official store on 2026-09-14. AC prices move weekly and are often lower on Amazon and Flipkart, especially in bank-offer weeks, so compare all three before buying — and check what installation is included, because extra copper pipe and an outdoor stand are usually charged separately.
Alternatives at a similar price
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