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Heated slabs-on-grade will feature hot water pipes or coils embedded within or beneath the slab to provide space heating. Unheated slab-on-grade floor: a slab-on-grade floor that is not a heated slab-on-grade floor. Heated slab-on-grade floor: a slab-on-grade floor with a heating source either within or below it. Let's unpack the issue in the context of ANSI/ASHRAE/IES Standard 90.1 - Energy Standard for Buildings Except Low-Rise Residential Buildings.įirst, the standard defines two classes of slab-on-grade: Slab-on-Grade Insulation Requirements in ASHRAE Standard 90.1 When it does, project teams will often lean on energy codes and standards to settle the issue.
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#Ashrae 90.1 insulation requirements code
Since most installing contractors and designers are not using this alternate compliance method, and the change is recent enough that hard copy and most electronic versions of the code don't include it, Partners will still need to ensure that their buildings comply with ASHRAE 90.1-2004.\r\rThe notice of the adoption of ASHRAE Standard 90.The prospect of slab-on-grade insulation can become complicated. This means if you ensure your project complies with ASHRAE 90.1-2004 you will automatically comply with the NYS ECCC and thus the Minimum Performance Standard.
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For climate zone 10b, which we used as an example yesterday, this is R-0 or no required insulation.\r\rPer ASHRAE 90.1 and the simulation guidelines slab penetrations should be modeled as separate wall sections \(height equal to the slab thickness\) and have the same insulation requirements as a wall with the same construction.\r\rI was also informed that as of ApASHRAE 90.1-2004 has been adopted as an alternate compliance path and replaced the previous reference to ASHRAE 90.1-2001. The NYS ECCC required insulation levels for the perimeters of intermediate floor slabs are those listed under the "Slab or below-grade wall" category. Since most installing contractors and designers are not using this alternate compliance method, and the change is recent enough that hard copy and most electronic versions of the code don't include it, Partners will still need to ensure that their buildings comply with ASHRAE 90.1-2004.The notice of the adoption of ASHRAE Standard 90.1 2004 is located at:)/Rect/Contents(\r\r\r\r\r\r\r\rAdditional Information for Octobers NC Tech Tip-\r\rIn response to the question asked during Thursdays NC Partner Conference Call, I contacted the NYS technical assistance help line \(1-51, open 8am-5pm\). For climate zone 10b, which we used as an example yesterday, this is R-0 or no required insulation.Per ASHRAE 90.1 and the simulation guidelines slab penetrations should be modeled as separate wall sections \(height equal to the slab thickness\) and have the same insulation requirements as a wall with the same construction.I was also informed that as of ApASHRAE 90.1-2004 has been adopted as an alternate compliance path and replaced the previous reference to ASHRAE 90.1-2001. Additional Information for Octobers NC Tech Tip-In response to the question asked during Thursdays NC Partner Conference Call, I contacted the NYS technical assistance help line \(1-51, open 8am-5pm\).