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  2. Seasonal energy efficiency ratio - Wikipedia

    en.wikipedia.org/wiki/Seasonal_energy_efficiency...

    In the United States, the efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER) which is defined by the Air Conditioning, Heating, and Refrigeration Institute, a trade association, in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [1]

  3. Bathtub curve - Wikipedia

    en.wikipedia.org/wiki/Bathtub_curve

    This graph is used in reliability engineering and deterioration modeling. The 'bathtub' refers to the shape of a line that curves up at both ends, similar in shape to a bathtub. The bathtub curve has 3 regions: The first region has a decreasing failure rate due to early failures. The middle region is a constant failure rate due to random failures.

  4. Consumer Reports - Wikipedia

    en.wikipedia.org/wiki/Consumer_Reports

    Consumer Reports (CR), formerly Consumers Union (CU), is an American nonprofit consumer organization dedicated to independent product testing, investigative journalism, consumer-oriented research, public education, and consumer advocacy.

  5. Failure rate - Wikipedia

    en.wikipedia.org/wiki/Failure_rate

    From field failure rate reports, statistical analysis techniques can be used to estimate failure rates. For accurate failure rates the analyst must have a good understanding of equipment operation, procedures for data collection, the key environmental variables impacting failure rates, how the equipment is used at the system level, and how the ...

  6. Air changes per hour - Wikipedia

    en.wikipedia.org/wiki/Air_changes_per_hour

    The use of roof space for heating or cooling was seen as ineffectual with the maximum heating benefits occurring in winter in more southerly regions (being close to the South Pole in these southern hemisphere reports) but being equivalent only to about 0.5 kW or the heating provided by about five 100 W incandescent light bulbs; cooling effects ...

  7. Best Gas Grills of 2022, according to Consumer Reports - AOL

    www.aol.com/news/best-gas-grills-2022-according...

    Nexgrill Deluxe 720-0896B (Home Depot) $449.00 at Home Depot. Nexgrill Deluxe 720-0896B (Home Depot) $652.55 at Walmart. Best Large Gas Grills Monument Grills 77352

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