Enter the temperature difference (K) and the heat flux through the insulation (W/m^2) into the calculator to determine the Insulation Efficiency. 

Insulation Efficiency Formula

The following formula is used to calculate the Insulation Efficiency. 

Eins = dT / q
  • Where Eins is the Insulation Efficiency ((K-m^2/W))
  • dT is the temperature difference (K) 
  • q is the heat flux through the insulation (W/m^2) 

To calculate the insulation efficiency, divide the temperature difference by the heat flux through the insulation.

How to Calculate Insulation Efficiency?

The following two example problems outline how to calculate the Insulation Efficiency.

Example Problem #1:

  1. First, determine the temperature difference (K). In this example, the temperature difference (K) is given as 132.
  2. Next, determine the heat flux through the insulation (W/m^2). For this problem, the heat flux through the insulation (W/m^2) is given as 321.
  3. Finally, calculate the Insulation Efficiency using the equation above: 

Eins = dT / q

Inserting the values from above and solving the equation: 

Eins = 132 / 321 = .411 ((K-m^2/W))

FAQ

What factors can affect insulation efficiency?

Several factors can impact the efficiency of insulation, including the type of insulation material used, the thickness of the insulation, the temperature gradient across the insulation, and the presence of moisture or air leaks. The overall condition of the insulation over time can also affect its efficiency.

How can you improve the insulation efficiency of a building?

Improving insulation efficiency can be achieved by selecting the appropriate insulation material for the specific application, ensuring that the insulation is installed correctly without gaps, increasing the thickness of the insulation where feasible, and sealing any air leaks. Regular inspections and maintenance can also help maintain the insulation’s effectiveness over time.

Why is insulation efficiency important in energy conservation?

Insulation efficiency is crucial for energy conservation because it directly affects the amount of heat loss or gain within a building. Efficient insulation reduces the need for heating and cooling systems to work harder to maintain comfortable indoor temperatures, leading to lower energy consumption and costs. Additionally, it contributes to reducing the carbon footprint of buildings by decreasing the demand on energy resources.