ConceptWall 50 Attic Window

Performance

Energy

Thermal insulation - Uw Double

0.23 Btu/hr.ft².°F

Thermal insulation - Uw Triple

0.25 Btu/hr.ft².°F

Comfort

Air tightness

0.02 cfm/ft³

Acoustics STC

41 dB

Acoustics OITC

35 dB

Properties

Max. dimensions & weight

Min. intertia mullion - Ix

14 cm⁴

Max. intertia transom - Ix

612 cm⁴

Min. intertia transom - Iy (glass load)

8 cm⁴

Max. intertia transom - Iy (glass load)

59 cm⁴

Sightlines

Min. width T-profile

1 15/16 inch

Min. visible width (interior view)

1 15/16 inch

Min. visible width (exterior view)

1 15/16 inch

Min. depth mullion

1 5/8 inch

Max. depth mullion

11 13/16 inch

Min. depth transom

3/16 inch

Glazing

Glazing method

Dry glazing - External glazing - Glazing bead - Structural Glued Glazing - Structural Glued Stepped Glazing