VELUX Non-Venting Curb-Mounted Skylight Specifications
 

Model QFS
 ventilating skylight
150
156		 ventilating skylight
302 		ventilating skylight
306		 ventilating skylight
656

W x H W x H W x H W x H W x H
Outside Frame (in) 23-1/4 x
23-7/16		 23-1/4 x
46-1/4		 30-9/16 x
30-1/2		 30-9/16 x
46-1/4		 47-1/4 x
46-1/4
Rough Opening/ Finished Framing (in) 22-7/16 x
22-1/2		 22-7/16 x
45-5/16		 29-11/16 x
29-9/16		 29-11/16 x
45-5/16		 46-7/16 x
45-5/16
Daylight Area-glass (in) 19-15/16 x
20-1/8		 19-15/16 x
42-15/16		 27-1/4 x
27-3/16

27-1/4 x
42-15/16

 43-15/16 x
42-15/16
Daylight Area (sq ft) 2.78 5.94 5.15 8.12 13.10
Net Weight (lbs) 37 57 51 68 115

 

Model QFS Test Results
 
AIR INFILTRATION
1.57 psf
75 Pa
0.16 cfm/ft2 0.80
l/s/m2
WATER RESISTANCE
12.0 psf
@ 5 US gal/ft2/h
 575 Pa
@ 3.4 l/m2/min
No Entry No Entry
STRUCTURAL PERFORMANCE

DOWNWARD LOAD WIND UPLIFT
Laminated,
Heat-Strengthened 		59-135 (psf) 23-63 (psf)

THERMAL PERFORMANCE
(Complete unit values)
All thermal performance SHGC Vt values for VELUX® skylights are NFRC certified, labeled and listed in the NFRC product directory. (In accordance with NFRC procedures.)
GLASS
New 20° slope ratings shown		 Tempered (75)
Tempered,
Low-E2,
Argon
Gas-filled 		Laminated (74)
Laminated,
Low-E2,
Argon
Gas-filled
U-factor (R-Factor)
SHGC
Vt 		0.49 (2.04)
0.29
0.49		 0.49 (2.04)
0.29
0.48
FADING PROTECTION %
GLAZING CLASSICAL UV
PROTECTION %		 TOTAL FADING
PROTECTION %
Tempered(75)
Laminated (74) 		87%
99.9% 		75%
83%

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