Thermal resistance and thermal transmittance in the hot box


© Fraunhofer IBP
Measurement Thermal resistance R and thermal transmittance U
Standards DIN EN ISO 12567-1, DIN EN ISO 12567-2, DIN EN 12412-2, DIN EN 12412-4, DIN EN ISO 8990, DIN EN 16012
Measurement object Windows (frame and glazing), profiles, skylights, doors, roller shutter casings, roof elements, continuous and individual roof lights, façade elements, walls, reflective insulation products

Technical data

Test opening, test specimen dimensions
(W × H)
1230 × 1480 mm
1400 × 1600 mm
1100 × 1600 mm
Small specimens From approx. 1.5 m², measurements can be conducted by means of masks made of insulating material
Larger specimens Measurement in the climate simulator


Special Feature

Horizontal sample installation Testing of continuous and individual rooflights according to DIN EN ISO 12567-2 in horizontal position



The test laboratory is recognized by the Deutsches Institut für Bautechnik (DIBt) as a testing facility under applicable building regulations LBO No. BWU10 and as a Notified Body No. 1004 to the terms of the Regulation of Construction Products (EU-BauPVO). It has been granted flexible accreditation under DIN EN ISO/IEC 17025 by the Deutsche Akkreditierungsstelle GmbH (DAkkS) under accreditation No. D‑PL‑11140‑11-04.