HEAT LOSS THROUGH GLAZING MEASURED IN U-VALUE
SINGLE GLAZING.....................................................................5.5
SECONDARY GLAZING............................................................2.9
DOUBLE GLAZING...................................................................2.8
DOUBLE GLAZING ARGON GAS FILLED...................................2.6.
NEW REGULATIONS L2............................................................2.2
NEW REGULATIONS L3............................................................2.0
SECONDARY GLAZING LOW-E GLASS.....................................1.9
DOUBLE GLAZING LOW-E GLASS............................................1.8
DOUBLE GLAZING LOW-E GLASS ARGON GAS FILLED............1.6
THE ABOVE IS AN APPROXIMATE GUIDE
