You are currently on the SWS 2017 legacy website. To view the current 2020 SWS website, please visit https://sws.nrel.gov.
The SWS 2017 website will be taken down in September 2022. You can access an archive of 2017 specifications from the 2020 SWS website under News & Updates.
Consistent, uniform
thermal boundaryThermal boundary
The separation between the interior and exterior environments of a building that slows heat flow
between conditioned and unconditioned space