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  2. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    Tier 2 are those that are 25% to 29.9% more efficient. Tier 3 is the highest qualification, for those refrigerators that are at least 30% more efficient than Federal standards. [42] About 82% of the Energy Star qualified refrigerators are Tier 1, with 13% qualifying as Tier 2, and just 5% at Tier 3. [citation needed]

  3. Data centre tiers - Wikipedia

    en.wikipedia.org/wiki/Data_centre_tiers

    Tier III: full N+1 redundancy of all systems, including power supply and cooling distribution paths Tier IV : as Tier III, but with 2N+1 redundancy of all systems A Tier III system is intended to operate at Tier II resiliency even when under maintenance, and a Tier IV system is intended to operate at Tier III resiliency even when under maintenance.

  4. Wikipedia:Tiers of reliability - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Tiers_of_reliability

    Toggle Tier 1: most reliable subsection. 1.1 Peer-reviewed publications. 1.2 Academic books. 2 Tier 2: more reliable. ... RSP would be at least in this tier; Example ...

  5. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. [ 1 ] [ 2 ] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs.

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  7. BEE Star Label - Wikipedia

    en.wikipedia.org/wiki/BEE_Star_Label

    The process for determining star ratings differs between various categories. For instance, the BEE had announced in 2016 that it would be switching to ISEER (Indian Seasonal Energy Efficiency Ratio) to calculate star ratings for air conditioners. This is an evolution of the SEER method used in the US.

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