iseer: Defined: ISEER, EER, star scores and what they imply in your AC, electrical energy payments and extra


Shopping for an air conditioner (AC) isn’t as straightforward a process because it was once a number of years. There are a plethora of choices obtainable out there. If that wasn’t complicated sufficient then do you have to go for a “5 star” or “Three star” AC? Then there’s the query of whether or not an inverter AC is best or do you have to go for a non-inverter one. The scores — or star system — stay a key facet when shopping for a brand new AC. You may need seen that yellow sticker that adorns the entrance of the AC. It’s the sticker that has all the knowledge like what number of star scores it has, what’s the ISEER and what number of electrical energy items will it roughly eat in a 12 months. Right here we inform you what are the various kinds of scores — ISEER, EER — and what they imply in your AC and electrical energy consumption.

What’s ISEER score?
It’s really known as EER or Vitality Effectivity Ratio — a grading system launched by the Bureau of Energy Efficiency

(BEE). The grading system is supposed for house home equipment — primarily air conditioners and fridges. Temperatures can go fairly excessive in India through the summer season season and since air conditioners eat plenty of vitality, the BEE got here up with a season score customary known as ISEER or Indian Seasonal Vitality Effectivity Ratio.
How are ISEER scores calculated and the way does it work?
Alright, so let’s get into some extra abbreviations. ISEER is definitely the ratio of CSTL (Cooling Seasonal Complete Load) to CSEC (Cooling Seasonal Vitality Consumption). In easy phrases, that is the ratio of the annual quantity of warmth the AC can take away to the whole quantity of vitality it will probably eat in a 12 months. The vitality effectivity of any AC is calculated on the typical efficiency primarily based on temperatures — outside — between 24 levels to 43 levels celsius.

Does EER additionally matter? How is it completely different from ISEER?
Sure, EER — Vitality Effectivity Ratio — additionally issues as it’s the quantity of warmth an AC removes in an hour divided by the whole energy it consumed throughout that point. The distinction between ISEER and EER is that the previous is supposed for a season — so the phrase seasonal is prefixed earlier than it.
Do the EER and ISEER have an effect on energy consumption?
Sure, it actually does. The upper the ISEER worth, the extra is the effectivity of the air conditioner. The identical is true for EER. The upper the EER worth, the extra energy-efficient the AC will likely be.
Do ACs with greater EER and ISEER value extra?
Sure, they do find yourself costing extra. It’s like how 5-star Acs are costly as a result of they’ve higher scores. So they are going to find yourself costing extra however may assist in saving extra money in your month-to-month energy payments.
Necessary issues to bear in mind:

  • EER and ISEER change each couple of years or so.
  • EER and ISEER are completely different for window ACs and cut up ACs.
  • The EER and ISEER are scores are amended periodically and fluctuate from the 12 months of manufacture of the AC.
  • The ACs manufactured between January 1, 2018 to June 30, 2022, can have completely different scores
  • All ACs manufactured after July 1, 2022, will see a slight change within the EER and ISEER scores. These scores will likely be legitimate until December 2024, until one other modification is made.
  • The final time the values or scores have been amended was on November 10, 2021.

ISEER scores for Window and Split AC (as per BEE)

Window AC Break up AC
From January 1, 2018, to June 30, 2022 From January 1, 2018, to June 30, 2022
ISEER score ISEER score
Star Degree Minimal Most Minimal Most
1-Star 2.5 2.69 3.1 3.29
2-Star 2.7 2.89 3.3 3.49
3-Star 2.9 3.09 3.5 3.99
4-Star 3.1 3.29 4.0 4.49
5-Star 3.3 4.5


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