![ashrae 90.1 insulation thickness ashrae 90.1 insulation thickness](https://d3i71xaburhd42.cloudfront.net/f34af4f48956406aaeac627e5ad2257471be7001/57-TableA.3-1.png)
![ashrae 90.1 insulation thickness ashrae 90.1 insulation thickness](https://cdnassets.hw.net/e9/03/7cd02ffa4e09a69759b4278c520a/how-to-spec-rigid-insulation-hero.jpg)
#ASHRAE 90.1 INSULATION THICKNESS CODE#
To meet the energy code requirement, a minimum pipe insulation thickness of 3.5 in. In this example, an insulation that has thermal conductivity in the range of 0.29 to 0.32 at 200☏ mean temperature would be applicable. IPS pipe operating at 300☏, select the temperature from the far left column and then select the pipe diameter from a column in the nominal pipe area. To determine the minimum pipe insulation thicknesses needed for 3-in. It is important to understand the energy requirements of the specific job before determining the insulation thickness needed. ASHRAE 189.1-2009 and IECC 2009 featured changes to their required energy code thickness tables (see Figures 4 and 5). Tables 6.8.2A and 6.8.2B (see Figure 3) can be used to determine the insulation thickness for both supply and return air ductwork.ĪSHRAE 90.1-2010 includes a new, more stringent table. To meet the energy code requirement, a minimum pipe insulation thickness of 4.5 in. It is important to ask energy code questions before starting the project and consult ASHRAE tables such as the ones excerpted in this article.įor instance, consider Table 6.8.3A in Figure 2. The commercial energy code map in Figure 1 indicates that the 2006 International Energy Conservation Code (IECC), 2009 IECC, and American Society for Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) 90.1 standard are gaining momentum, as more states begin to comply with the federal mandate of the 1992 Energy Policy Act, which requires all states to have a policy to reduce energy usage that meets or exceeds ASHRAE 90.1.Īs Figure 1 demonstrates, it is not easy to determine what insulation thickness is needed for energy code compliance. Nationwide, the requirements for complying with commercial energy codes have changed, and there may be new requirements in your state.