Window Maker’s Glossary

D

• Dew point

F

• Frame installation depth

G

• Glazing Heat Transfer Coefficient – Ug

P

• Psi (Ψg) – Linear Heat Transfer Coefficient at the Frame-Glass Junction (Spacer Frame)

S

• Specialty Windows / Custom Shapes

T

• Triangular windows

U

• Uf-value: Frame Heat Transfer Coefficient

W

• Window Sound Insulation Rw
• Window thermal transmittance Uw