VELUX Venting Curb-Mounted Skylight Specifications
 

Models VCE and VCM
 ventilating skylight
2222		 ventilating skylight
2234		 ventilating skylight
2246		 ventilating skylight
3030

W x H W x H W x H W x H
Inside Curb (in) 22-1/2 x
22-1/2		 22-1/2 x
34-1/2		 22-1/2 x
46-1/2		 30-1/2 x
30-1/2
Outside Curb (in) 25-1/2 x
25-1/2		 25-1/2 x
37-1/2		 25-1/2 x
49-1/2		 33-1/2 x
33-1/2
Maximum skylight clearance (in) 26-1/4 x
26-1/4		 26-1/4 x
38-1/4		 26-1/4 x
50-1/4		 34-1/4 x
34-1/4
Daylight Area-glass (in) 20.62 x
18.62		 20.62 x
30.709		 20.62 x
42.72

28.62 x
26.69
Daylight Area (sq ft) 2.67 4.40 6.12 5.30
Ventilation area (opening) (sq ft) 1.46 3.84 4.73 2.01
Net Weight (lbs) 59 82 90 85

 

Models VCE and VCM
 ventilating skylight
3046		 ventilating skylight
3434		 ventilating skylight
4646

W x L W x L W x L
Inside Curb (in) 30-1-2 x
46-1/2		 34-1/2 x
34-1/2		 46-1/2 x
46-1/2
Outside Curb (in) 33-1/2 x
49-1/2

37-1/2 x
37-1/2

 49-1/2 x
49-1/2
Maximum skylight clearance (in) 34-1/4 x
50-1/4		 38-1/4 x
38-1/4		 50-1/4 x
50-1/4
Daylight Area-glass (in) 28.62 x
42.72

32.62 x
30.709

 44.62 x
42.72
Daylight Area (sq ft) 8.49 6.96 13.24
Ventilation area (opening) (sq ft) 5.13 4.65 6.50
Net Weight (lbs) 117 103 149

Models VCE and VCM Test Results
 
AIR INFILTRATION
1.60 psf
75 Pa
0.08 cfm/ft2 0.41
l/s/m2
WATER RESISTANCE
7.50 psf
@ 5 US gal/ft2/h
 360 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)
Laminated,
Tempered
92-174 (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 		0.55 (1.81)
0.29
0.48		 0.55 (1.81)
0.29
0.47
FADING PROTECTION %
GLAZING CLASSICAL UV
PROTECTION %		 TOTAL FADING
PROTECTION %
Tempered (75)
Laminated (74) 		87%
99.9% 		75%
83%

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