#DEPRIESTER CHART K VALUES LOW T WINDOWS#
an insulating unit incorporating 2.3 1.8 1.7 Pilkington Optitherm SN Solid wooden door 3.0 Indicative U values for windows with wood or PVC-U frames n is the emissivity of the low E glass.
an insulating unit incorporating 2.3 1.8 1.7 Pilkington Optitherm SN Solid wooden door 3.0 Indicative U values for windows with wood or PVC-U frames n is the emissivity of the low E glass.