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  2. Cellulose insulation - Wikipedia

    en.wikipedia.org/wiki/Cellulose_insulation

    The cellulose insulation lost 26.4% less heat energy over time compared to the fiberglass insulation. It also was shown to tighten the structure more than 30%. [ 8 ] Subsequent real world surveys have cellulose performing 20–30% better at reducing energy used for heating than fiberglass.

  3. List of insulation materials - Wikipedia

    en.wikipedia.org/wiki/List_of_insulation_materials

    This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.

  4. Building insulation material - Wikipedia

    en.wikipedia.org/wiki/Building_insulation_material

    Wet-spray cellulose insulation is similar to loose-fill insulation, but is applied with a small quantity of water to help the cellulose bind to the inside of open wall cavities, and to make the cellulose more resistant to settling. Spray application provides even better protection against air infiltration and improves wall rigidity.

  5. Dynamic insulation - Wikipedia

    en.wikipedia.org/wiki/Dynamic_insulation

    Dynamic insulation works best with a good thickness of insulation so taking 200 mm of cellulose insulation (k = 0.04 W/m °C) the dynamic U value for an air flow of 0.31 mm/s is calculated using equation above to be 0.066 W/m 2 °C. If a lower dynamic U-value is required then a material with lower air permeability than fibreboard would need to ...

  6. Building insulation - Wikipedia

    en.wikipedia.org/wiki/Building_insulation

    Thermal insulation in buildings is an important factor in achieving thermal comfort for its occupants. [4] Insulation reduces unwanted heat loss or gain and can decrease the energy demands of heating and cooling systems. It does not necessarily deal with issues of adequate ventilation and may or may not affect the level of sound insulation.

  7. R-value (insulation) - Wikipedia

    en.wikipedia.org/wiki/R-value_(insulation)

    Installed faced fiberglass batt insulation with its R-value visible (R-21) [1]. The R-value (in K⋅m 2 /W) is a measure of how well a two-dimensional barrier, such as a layer of insulation, a window or a complete wall or ceiling, resists the conductive [2] flow of heat, in the context of construction. [3]

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