Categories Spunstrand New ICC-ESR-1681 Listing For Non Insulated Duct & R-4, R-6, R-8, R-10, R-12 Duct Post author By spunstrand Post date February 8, 2023 ESR-1681 Final Report ← Introducing Spunstrand, Inc. – Video from Live Webinar → Spunstrand Thermal Insulation Manufacturer License # T1494