Quadruple glazing

Multipane glazing is often designed with thinner intermediate glass panes in order to save weight.

[7][5] With more than three glass panes, special care must be taken of the spacer and sealant temperatures as intermediate glass panes in contact with these glazing elements can readily exceed design temperature limits of respective materials due to solar radiation (irradiance) heating.

Calculating static equilibrium with thin glass panes used in multipane glazing may involve nonlinear plate mechanics.

Recent price reductions in the thin glass used in both smartphones and flat-screen TVs, as well as in the krypton gas used in halogen lights, however, have made it possible to build lighter, high- efficiency quad-pane windows at a lower cost.

Researchers from the National Renewable Energy Laboratory evaluated two configurations of Alpen High Performance (an American manufacturer) quad-pane windows at an office building at the Denver Federal Center.

Standard quadruple glazed window - openable
The quadruple glazing, Q-Air, on Deg 8 building in Oslo, Norway (2020). Renovation brings U g value of 0,29 W/(m 2 K) [R-value 20
Measured and clear-sky calculated seasonal dependence of the direct solar energy transmittance in multipane glazing. [ 1 ]
Cold downdraught analysis in multipane glazing. [ 1 ]
Peak solar radiation heating induced temperature profile of the triple- and quadruple-pane glazing comprising low-E coatings and argon gas fill. [ 1 ]
Angle-dependent view through the quad glazing from inside of the Deg 8 building in Oslo.