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  2. Fill power - Wikipedia

    en.wikipedia.org/wiki/Fill_power

    A thicker layer of trapped air gives more insulation. This thickness is often called "loft." A comforter that uses 550 fill power down, for example, would have to use approximately 40%-50% greater weight of down than a similar item that uses 800 fill power down to provide the same loft.

  3. Overhead power line - Wikipedia

    en.wikipedia.org/wiki/Overhead_power_line

    An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy along large distances. It consists of one or more conductors (commonly multiples of three) suspended by towers or poles.

  4. Hydropower policy of the United States - Wikipedia

    en.wikipedia.org/wiki/Hydropower_policy_of_the...

    A calculation of the historic average annual hydropower production baseline for the facility, along with the supporting water flow information and corresponding actual annual power production data for the period of record. Such calculations must be based on the units operating capacities as authorized under a Commission's license or exemption.

  5. List of countries by tax rates - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_tax_rates

    0% (free zone companies, [239] as well as mainland companies with less than 375,000 AED a year in profit, [240] may need to fill out a tax return) 9% (for mainland companies with a net profit over AED 375,000 annually, taxation paid to other countries credited towards UAE taxation, tax return required) [ 240 ]

  6. List of countries by GDP (PPP) per capita - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_GDP...

    Top 10 Tax haven (Conduit OFC) 4 Brunei: Oil & Gas 5 Ireland: Top 10 Tax haven (Conduit OFC) 6 Norway: Oil & Gas 7 Kuwait: Oil & Gas 8 United Arab Emirates: Oil & Gas 9 Switzerland: Top 10 Tax Haven (Conduit OFC) — Hong Kong: Top 10 Tax Haven (Sink OFC) 10 San Marino: Tax haven (Sink OFC) 11 United States: 59,495 12 Saudi Arabia: Oil & Gas 13

  7. Hydroelectricity - Wikipedia

    en.wikipedia.org/wiki/Hydroelectricity

    The Three Gorges Dam in Central China is the world's largest power-producing facility of any kind.. Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power).

  8. Russia in the European energy sector - Wikipedia

    en.wikipedia.org/wiki/Russia_in_the_European...

    In 2021, it was the largest exporter of oil and natural gas to the European Union, (90%) [1] [2] and 40% of gas consumed in the EU came from Russia. [3] [4] The Russian state-owned company Gazprom exports natural gas to Europe. It also controls many subsidiaries, including various infrastructure assets. [5]

  9. Heat recovery ventilation - Wikipedia

    en.wikipedia.org/wiki/Heat_recovery_ventilation

    Diagramatic operation of a thermal wheel Ljungström air preheater by Swedish engineer Fredrik Ljungström (1875–1964). A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of air-handling units or rooftop ...