24 rows · * g – value depends on which thermal insulation glass is selected as inner pane ** g – value depends on which thermal insulation glass is selected as inner pane (all based on 4 mm thickness) For higher g -values please refer to our Thermal Insulation glass product range; For thicknesses other than above calculate using Pilkington Spectrum, 1/18/2018 · Generally, most windows will have a g-value that ranges between 0.2 and 0.7 while a window with solar control glazing should have a g-value of no more than 0.5. In colder climates, solar gain from windows is used to the homeowner’s advantage. Large windows are positioned on the south-facing walls of properties to maximise solar gain.
The g-value is a measure of how much solar heat (infrared radiation) is allowed in through a particular part of a building. A low g-value indicates that a window lets through a low percentage of the solar heat. The g-value can be improved by having the outer glass pane coated with an IR-reflecting surface which reflects some of the radiant heat.
g-values can refer to the centre-of- glass g-value, or can relate to the entire window, including frame (gglass or gwindow). Generally, a higher g-value will be beneficial in cooler climates and a lower g-value in warmer climates. Typically g-values will range between 0.2 and 0.7, with solar control glazing having a g-value of less than 0.5.
G-value is the coefficient used in Europe to measure the solar energy transmittance of glass – called a Solar Factor (%) ie, 53% = 0.53. G-values range from 0 to 1, a lower value representing less solar gain. Shading coefficient values are calculated using the sum of the primary solar transmittance (T-value) and the secondary transmittance.
G-value in buildings – Designing Buildings Wiki, U-value & g-value | Hammerglass (EN), U-value & g-value | Hammerglass (EN), G Value – Glass Block Technology Limited is a stockist and …
