Blue Star 0.8 Ton 3 Star Inverter Split AC IA309TNU
Blue Star
8.0/10
₹27,99028% off
- 0.8 ton
- 3 star
- Split
Small rooms of up to about 100 sq ft
View details
🧊 Air conditioner
Brand: Blue Star
Blue Star 0.8 Ton 3 Star Window AC WFE309L
The lowest-priced AC on our list — a 0.8 ton window unit
7.4/10
Our editorial score
Good — right for the specific buyer
Rooms of up to about 90 sq ft: a study, a PG room or a single hostel room
- Capacity
- 0.8 ton
- Energy rating
- 3 star · ISEER 3.15
- Type
- Window
- Compressor warranty
- 5 years
About this air conditioner
- Stabiliser-free across stabiliser-free operation (range not stated)
- One of the lowest prices on our list for a 1 ton 3-star window AC
- One box, no outdoor unit — it moves with you to the next flat without a split AC's reinstallation bill
- Copper condenser with anti-corrosive Blue Fins
- 5-year compressor warranty
How it scores
Cooling performance6.9
Build & coil quality8.1
Value for money8.7
Electricity cost5.7
Installation & service8.8
Our verdict
At ₹23,590 this is the lowest-priced AC we list. It is a 3-star 0.8 ton window unit with 2,490 W of rated cooling, a copper condenser with anti-corrosive blue fins, self-diagnosis, stabiliser-free operation and five years on the compressor.
0.8 ton is genuinely small. It suits a room of up to about 90 sq ft; in a standard 120 sq ft bedroom it will run flat out and still fall behind on a hot afternoon. Its product photo is the one Blue Star uses for the 1 ton WFE312L, which shares the same body.
What we like
- Stabiliser-free across stabiliser-free operation (range not stated)
- One of the lowest prices on our list for a 1 ton 3-star window AC
- One box, no outdoor unit — it moves with you to the next flat without a split AC's reinstallation bill
- Copper condenser with anti-corrosive Blue Fins
- 5-year compressor warranty
What we don't
- 0.8 ton is genuinely small — it cannot keep up in a standard 120 sq ft bedroom
- Fixed-speed compressor switches on and off instead of slowing down — louder and costlier to run than an inverter
- 2,490 W rated cooling is 29% below a true 1 ton (3,517 W), so size it for a smaller room
- Louder than a split, and needs a window or wall opening of the right size
- The BEE annual-units figure is not on the product page, so a rupee running cost has to be read off the label on the unit
Full specifications
| Type | Window AC, fixed-speed compressor |
|---|---|
| Model code | WFE309L |
| Capacity | 0.8 ton — 2,490 W rated cooling |
| Energy rating | 3 star (2025 BEE label) |
| ISEER | 3.15 |
| Refrigerant | R32 |
| Condenser | Copper |
| Coil protection | anti-corrosive Blue Fins |
| Rated ambient | Cools up to 52°C outdoors |
| Wi-Fi | Not listed |
| Stabiliser-free range | stabiliser-free operation (range not stated) |
| Indoor noise | 53 dB(A) at the lowest fan speed |
| Warranty | 5 years on the compressor, 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 Window AC WFE309L — frequently asked questions
What room size is the Blue Star WFE309L suitable for?
Rated at 2,490 W, it suits a middle-floor room of up to about 90 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 efficient is the Blue Star WFE309L?
Blue Star publishes an ISEER of 3.15 for it. ISEER is cooling delivered per unit of electricity across a typical Indian season, so a higher number means a lower bill for the same cooling — 3-star inverter splits usually sit around 4.3-4.5 and the best 5-star units near 5.8. Blue Star does not publish the BEE annual-units figure on the product page, so a rupee estimate cannot be made from the brand's own numbers.
What warranty does the Blue Star WFE309L come with?
5 years on the compressor, 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 WFE309L at the best price?
We list ₹23,590 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.
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