X

HFM – Window Glass – Thermal transmittance – Horizontal vs. Vertical Measurement

Inhomogeneous glass sample – U-value – Thermal Conductivity

A 3-layer window glass with argon filler has been investigated by Linseis HFM 300 in the temperature range from 10 °C to 50 °C. The measurement was performed in a horizontal (standard) and vertical setup.

App. Nr. 02-005-02 HFM – Window Glass – Thermal transmittance – Horizontal vs. Vertical Measurement

App. Nr. 02-005-02 HFM – Window Glass – Thermal transmittance – Horizontal vs. Vertical Measurement

The diagram shows a significant difference in the U-value results between vertical and horizontal measurement setup, which are due to convection effects within the insulation layer. This measurement clearly indicates that inhomogeneous building materials need to be measured in the direction of their final use to get accurate values of the thermal conductivity and the thermal transmittance (U-value).

Related instruments

HFM

HFM – Heat Flow Meter – The perfect solution for isolating materials

Temperature range:

  • Fixed 0 to 40°C
  • var. 0 to 100°C
  • -20 up to 75°C
  • var. -30 to 90°C
  • var. -20 to 70°C

Details