AC star ratings: the short answer

A star rating describes efficiency under the BEE schedule printed on the label. A new schedule does not physically change your AC or automatically relabel it. To compare older and newer units, check the ISEER value, label period, AC category and annual energy consumption. The calculator below is an illustration, not an official rating verification.

Walk up to any AC in your office right now and look at the sticker on the side. It probably says five stars. It probably isn’t five stars any more.

On 1 January 2026, the Bureau of Energy Efficiency revised the ISEER thresholds that decide how many stars an air conditioner earns. Every band moved up by roughly 10 to 14 per cent. Nothing about your unit changed - same compressor, same coil, same performance it had in December. What changed is the bar it is measured against. A machine that qualified as 5-star under the old norms now sits in the 4-star band.

And here is the part almost nobody mentions: the sticker does not get reprinted. The stars printed on the side of your unit are a snapshot of the standard that existed on the day it was manufactured. They stay there, unchanged and quietly out of date, for the entire life of the machine.

1. What actually changed on 1 January 2026

Three things moved together.

• The thresholds went up. Every star band now demands a higher ISEER than it did in 2025. The shift is large enough that most of the market slid down one full star - what was 5-star is 4-star, what was 4-star is 3-star, and so on down the scale.

• The test conditions got harder. Testing now reflects higher ambient temperatures and longer operating hours, which is closer to what a machine on a Delhi or Hyderabad rooftop actually faces in May.

• Label validity got shorter. Star labels are now issued against a defined label period rather than indefinitely, so claims go stale on a published schedule instead of drifting.

None of this is a scandal. It is the system working as designed - BEE has raised the bar roughly every two to three years since labelling began in 2007, and each revision is what stops “5-star” from becoming a meaningless sticker. But it does mean one thing that catches buyers out: a star rating is only comparable within its own label period.

2. What is actually printed on that sticker

Most people look at a BEE label for about two seconds, register the star count, and move on. There are five zones on it, and the stars are arguably the least useful.

The five zones of a BEE label

1. The star band The coloured strip running red to green with the filled stars. Eye-catching, and the most misleading element once a revision has passed.

2. The ISEER value Annual cooling delivered divided by electricity consumed, measured across a temperature range that reflects real Indian conditions rather than one laboratory set-point. This is the actual number.

3. Annual power consumption Rated units of electricity per year. Multiply by your commercial tariff and you have a running-cost estimate before you have bought anything.

4. The label period Printed at the bottom, usually ignored, and the line that tells you whether the stars above it still mean what they say.

5. Brand, model and registration number Enough to verify the unit against BEE’s own comparison database rather than taking a dealer’s word for it.

Compare ISEER numbers, not stars. A 2026-labelled 4-star unit can be more efficient than a 2022-labelled 5-star unit.

The older machine did not get worse. The standard got stricter.

3. Two units, same star count, different electricity bills

Even inside a single label period, a star band is a range, not a value. Two machines sitting at opposite ends of the same band can differ by roughly a thousand rupees a year in running cost on a 1.5 TR unit.

One unit, that gap is a rounding error. Across a forty-unit installation running commercial hours, it is a line item - and it is invisible if the only thing on your comparison sheet is a star count. This is the most common procurement error in commercial cooling: treating a band as a specification.

4. Where this bites a business, not a household

For a home with one AC, a star downgrade is trivia. For a business running a fleet, it touches three things.

• Your savings and ESG reporting. If your efficiency claims were built on a 5-star specification certified before 2026, the label underneath those numbers has moved. The machines still consume exactly what they consumed - but the benchmark you report against has shifted, and anyone auditing the claim will notice before you do.

• Your payback maths. Efficiency premiums are usually justified over a two to three year payback. If the comparison baseline moves mid-term, the model needs re-running rather than assuming.

• Your next purchase. There is old stock in the market carrying pre-2026 labels, legitimately manufactured before the cut-off. It is not counterfeit and it is not illegal to sell. It is simply rated against a standard that no longer applies, and the sticker will not tell you that unless you read the label period.

5. What to check before you sign the next purchase order

• Read the label period first, star count second. If it predates January 2026, mentally drop one star before comparing.

• Ask for the ISEER value in writing on the quotation, not just the star count. Any supplier who resists this has answered a different question.

• Check the date of manufacture against the label period. Old stock is the most common way a pre-revision label reaches a 2026 buyer.

• Verify the model against BEE’s public database using the registration number on the label.

• Compare annual power consumption against your own tariff, not the brochure’s assumed one. Commercial tariffs in most Indian cities run well above the residential rate the marketing maths is built on.

The part nobody selling you an AC will mention

This will happen again. BEE has revised thresholds roughly every two to three years for nearly two decades, and there is no reason to expect the next revision to be gentler - efficiency standards ratchet in one direction only. Which means that on a purchase model, the day you take delivery is the most efficient your fleet will ever be relative to the standard. From there it only slides.

You have paid capex for a machine, and the benchmark it was bought against walks away from it while the machine sits on your wall for the next ten years.

That is the structural argument for Cooling as a Service, and it is not a marketing one. At CircoLife the units belong to us, so their efficiency is our cost, not yours. When the standard moves, keeping the fleet current is on our balance sheet. You pay a fixed monthly subscription for units that are efficient today and stay that way, IoT-monitored so you are reading actual consumption rather than a rated figure on a sticker, with maintenance included by default. Zero capex, and roughly 30% lower electricity bills alongside it.

Find out what your fleet is actually rated at

Most businesses do not know what label period their units were certified under, because nobody has had a reason to look until now. Send us the model numbers - or a photo of the sticker on any one unit - and we will tell you what those machines rate at under the 2026 norms, what they are costing you at your tariff, and whether the gap is worth doing anything about.

Free, and no obligation.

Frequently asked questions

Does a new BEE schedule make my AC consume more electricity?

No. A standards revision changes the comparison benchmark, not the machine’s physical performance. Actual consumption depends on operating conditions, usage and maintenance.

Can I find my current rating from the printed stars alone?

No. Check the model’s ISEER, label validity period and AC category against the applicable BEE schedule. A blanket one-star deduction is only a simplified illustration.

How do I estimate my fleet’s electricity cost?

For a comparable annual usage basis, multiply annual electricity consumption in kWh by your tariff per kWh and the number of units. Label estimates may differ from measured commercial usage.

Where can I verify a BEE label?

Consult the Bureau of Energy Efficiency and its Standards & Labelling programme for the relevant room-air-conditioner schedule and model details.