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ConceptSystem 77 Hidden Vent

Technical information

Performance

Energy

Thermal insulation - Uw Double
0.24 Btu/hr.ft².°F
Thermal insulation - Uw Triple
0.18 Btu/hr.ft².°F

Comfort

Air tightness
0.04 cfm/ft³
Water tightness
12 psf
AMAA rating
Class AW
PG rating
120
Acoustics STC
43 dB
Acoustics OITC
34 dB

Safety

Opening & closing resistance
Class 3
* Note: Performances and properties may be different depending on the profile combinations

Properties

Max. dimensions & weight

Min. height of element
26 5/16 inch
Min. width of element
20 3/8 inch
Min. height of vent
23 5/8 inch
Max. height of vent
94 1/2 inch
Min. width of vent
17 11/16 inch
Max. width of vent
31 1/2 inch
Max. weight of vent
264 lbs

Sightlines

Min. frame width (inward opening)
3 inch
Min. frame-vent width (inward opening)
3 inch
Min. vent-vent width (inward opening)
4 5/8 inch
Min. width T-profile
4 inch
Depth frame
2 11/16 inch
Depth Vent
2 7/8 inch
Depth frame-vent
3 1/16 inch

Glazing

Rebate height
3/4 inch
Glazing method
Dry glazing Siliconized glazing Internal glazing External glazing Glazing bead
Min. glass thickness - frame/element
3/16 inch
Max. glass thickness - frame/element
1 7/8 inch
Min. glass thickness - vent
13/16 inch
Max. glass thickness - vent
1 7/8 inch