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  2. Viessmann - Wikipedia

    en.wikipedia.org/wiki/Viessmann

    Viessmann headquarters in Allendorf (Eder), Germany. The Viessmann Group is a German manufacturer of heating and refrigeration systems headquartered in Allendorf (Eder), Germany. With 22 production companies in 12 countries, distribution companies and representative offices in 74 countries and 120 sales offices throughout the world, Viessmann ...

  3. Annual fuel utilization efficiency - Wikipedia

    en.wikipedia.org/wiki/Annual_fuel_utilization...

    The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

  4. Condensing boiler - Wikipedia

    en.wikipedia.org/wiki/Condensing_boiler

    The lower the return temperature to the boiler the more likely it will be in condensing mode. If the return temperature is kept below approximately 55 °C (131 °F), the boiler should still be in condensing mode making low temperature applications such as radiant floors and even old cast iron radiators a good match for the technology.

  5. List of boiler types by manufacturer - Wikipedia

    en.wikipedia.org/wiki/List_of_boiler_types_by...

    Vanderbilt boiler An American design, similar to the Lentz and large launch-type boilers. [36] Velox boiler: [61] vertical boiler: flued or fire-tube designs where the main shell is a cylinder on a vertical axis, rather than horizontal. Boilers of this external form may have a great variety of internal arrangements.

  6. Thermal efficiency - Wikipedia

    en.wikipedia.org/wiki/Thermal_efficiency

    So, for a boiler that produces 210 kW (or 700,000 BTU/h) output for each 300 kW (or 1,000,000 BTU/h) heat-equivalent input, its thermal efficiency is 210/300 = 0.70, or 70%. This means that 30% of the energy is lost to the environment. An electric resistance heater has a thermal efficiency close to 100%. [8]

  7. Steak has many nutrients, but here's why you should avoid ...

    www.aol.com/steak-many-nutrients-heres-why...

    Steak is also a good source of vitamin B12, "which is crucial for energy levels, brain health, and red blood cell production," says Alex Larson, a registered dietitian, endurance athlete ...

  8. The 6 underrated destinations travel planners say will be ...

    www.aol.com/6-underrated-destinations-travel...

    Arena told BI that Uruguay is a hot spot for art and culture. "There are many museums and galleries to choose from throughout the Punta del Este, Montevideo, and Colonia del Sacramento regions in ...

  9. Boiler - Wikipedia

    en.wikipedia.org/wiki/Boiler

    A boiler is a closed vessel in which fluid (generally water) is heated.The fluid does not necessarily boil.The heated or vaporized fluid exits the boiler for use in various processes or heating applications, [1] [page needed] [2] [page needed] including water heating, central heating, boiler-based power generation, cooking, and sanitation.

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