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  2. Appliance classes - Wikipedia

    en.wikipedia.org/wiki/Appliance_classes

    This is usually achieved at least in part by having at least two layers of insulating material between live parts and the user, or by using reinforced insulation. In Europe, a double insulated appliance must be labelled Class II or double insulated or bear the double insulation symbol: ⧈ (a square inside another square). As such, the ...

  3. Insulated glazing - Wikipedia

    en.wikipedia.org/wiki/Insulated_glazing

    Fitting a second pane of glass to improve insulation began in Scotland, Germany, and Switzerland in the 1870s. [3] Insulating glass is an evolution from older technologies known as double-hung windows and storm windows. Traditional double-hung windows used a single pane of glass to separate the interior and exterior spaces.

  4. Insulation system - Wikipedia

    en.wikipedia.org/wiki/Insulation_system

    Basic insulation is any material added to protect a user from accidental contact with energized parts. Supplemental insulation is rated to withstand 1500 volts AC. Double insulation is a design concept where failure of one insulation system will not expose the user to a shock hazard due to the presence of a second independent layer of insulation.

  5. Window insulation - Wikipedia

    en.wikipedia.org/wiki/Window_insulation

    Clear double glazing has a U-factor between 1.8 and 3 W/(m 2 ⋅K) or between 0.3 and 0.5 Btu/(h⋅ft 2 ⋅°F) (about R-2) Clear triple glazing has a U-factor between 0.5 and 1 W/(m 2 ⋅K) or between 0.1 and 0.2 Btu/(h⋅ft 2 ⋅°F) (about R-3). Double and triple glazing are critical for energy efficiency. Single glass windows are no longer ...

  6. Double insulation - Wikipedia

    en.wikipedia.org/?title=Double_insulation&...

    This page was last edited on 14 February 2011, at 02:05 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  7. Insulation - Wikipedia

    en.wikipedia.org/wiki/Insulation

    Thermal insulation, use of materials to reduce rates of heat transfer List of insulation materials; Building insulation, thermal insulation added to buildings for comfort and energy efficiency Insulated siding, home siding that includes rigid foam insulation; Insulated glazing, a thermally insulating window construction

  8. Building insulation - Wikipedia

    en.wikipedia.org/wiki/Building_insulation

    Mineral wool insulation A semi-detached house with one half of the facade in the original state and the other half after insulation with polystyrene Old brick houses in Sosnowiec, Poland, insulated with polystyrene A single-family house in Bielsko-Biała, Poland, during the implementation of thermal insulation A historic building in Kuźnia Raciborska, Poland, during the implementation of ...

  9. Insulator (electricity) - Wikipedia

    en.wikipedia.org/wiki/Insulator_(electricity)

    Class II insulation means that the device is double insulated. This is used on some appliances such as electric shavers, hair dryers and portable power tools. Double insulation requires that the devices have both basic and supplementary insulation, each of which is sufficient to prevent electric shock. All internal electrically energized ...

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