Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Fiberglass Insulation

Thermal conductivity of fiberglass insulation - temperature and k-values.

Fiberglass is made of molten glass spun into micro fibers and is one of the most common types of insulation used.

Fiberglass thermal conductivity vs. temperature are indicated in the charts below:

Fiberglass - Thermal Conductivity vs. Temperature - Metric Units

Fiberglass - Thermal Conductivity vs. Temperature - Imperial Units

Calcium Silicate Insulation
Thermal conductivity of calcium silicate insulation - temperature and k-values.
Insulation Materials - Operating Temperature Limits
Temperature limits for commonly used insulation materials.
Mineral Wool Insulation
Thermal conductivity - k-values - vs. temperature.
Perlite Insulation
Thermal conductivity - k-values - vs. temperature.
Pipes - Insulated Heat Loss Diagrams
Heat loss (W/m) from 1/2 to 6 inches insulated pipes - ranging insulation thickness 10 to 80 mm and temperature differences 20 to 180 degC.
Polyurethane Insulation
Thermal conductivity - k-values - vs. temperature.
Thermal Conductivity of Water: Temperature and Pressure Data
Figures and tables showing thermal conductivity of water (liquid and gas phase) with varying temperature and pressure, SI and Imperial units.
Thermal Resistivity and Conductivity
The ability of a material to resist flow of heat.