Partial Translation General Technical Approval number Z -23.11-1662 Date: 01 July 2010 Please note: This translation of the original version has not been audited by the German Institute for Building Technology (DIBt).

General Technical Approval Deutsches Institut für Bautechnik (DIBt) (German Institute for Building Technology) A PUBLIC BODY Approval body for building products and methods Testing authority for building technology Member of the European Organisation for Technical Approvals (EOTA) and the European Union of Agrément (UEAtc) Tel.: +49 30 78730-0 Fax: +49 30 78730-320 E-mail: [email protected] Date: 01 July 2010 Approval number: This Approval is valid until: Applicant: Porextherm Dämmstoffe GmbH Heisinger Straße 8, 87437 Kempten, Germany Approved Item: Fumed silica vacuum insulation panels "Vacupor NT-B2",...

General Technical Approval Z -23.11-1662 Approved Item and Area of Application Approved Item The General Technical Approval applies for the manufacture and use of vacuum insulation panels (VIPs) bearing the designations "Vacupor NT-B2", “Vacuspeed", "Vacupor PS-B2", "Vacupor RP-B2", "Vacupor XPS-B2", "Vacupor TS-B2", "Vacupor NT-B2-S", "Vacupor PSB2-S", "Vacupor RP-B2-S", "Vacupor XPS-B2-S" and "Vacupor TS-B2-S" (hereinafter called “VIP elements”). The "Vacupor NT-B2" and "Vacuspeed" VIP elements consist of a supporting core made of microperforate fumed silica, heat-sealed under vacuum in triple-metallised...

General Technical Approval Z -23.11-1662 Thermal conductivity In the case of "Vacupor NT-B2" and "Vacuspeed" VIP elements, on testing to DIN 52612-16 or DIN EN 126677, the measured value for thermal conductivity λ10,tr (initial values prior to commencement of aging) should not exceed 0.0053 W/(m ּ◌K). In the case of "Vacupor NT-B2-S" VIP elements, on testing to DIN 52612-16 or DIN EN 126677, the measured value for thermal conductivity λ10,tr (initial values prior to commencement of aging) should not exceed 0.0044 W/(m ּ◌K). 2.1.7 Compressive strain at 10% compression On testing of the VIP elements...

General Technical Approval Z-23.11-1662 Provisions relating to design and dimensioning Design value for thermal conductivity For verification calculations of thermal resistance of the components, the following thermal conductivity design values apply for the VIP elements (without the particular lining): "Vacupor NT-B2", "Vacuspeed", "Vacupor PS-B2", "Vacupor RP-B2", "Vacupor XPS-B2" and “Vacupor TS-B2” λ = 0.0080 W/(m* ּ◌K) "Vacupor NT-B2-S", "Vacupor PS-B2-S", "Vacupor RP-B2-S", "Vacupor XPS-B2-S" and “Vacupor TS-B2-S” λ = 0.0070 W/(m* ּ◌K) These include allowance for additional thermal losses...