More on U-values

I haven't yet started to plot any results, but some early observations appear: Outside, the surface temperatures are always higher than the OAT. The insulated panel is performing best - by far - and the glass is just a tad colder than the solid wood. The glass margin is almost a degree warmer than centre pane, even with Super Spacer. Inside, the glass feels much colder to the touch than either the insulated wood panel and the solid wood rail. This may be a Thermal Capacity issue, but the effect does not change with prolonged touch. The glass always feels colder than the wood. The dawn OAT has been steadily declining for the past week (3 degrees now) so the temperature gradients are becoming significant.