HFC Fixed skylight module
	HVC Motorized comfort venting skylight module Opening up to 410 mm
	HVC Motorized smoke venting skylight module Opening up to 700 mm in less than 60 seconds

All modular skylight solutions are based on the same single skylight module and the same basicinstallation process. In other words, you are not required to specify different modules to differentsolutions. The modular concept is in every sense a “one module fits all”, meaning you can applythe same module specifications, regardless of whether you prefer longlight, ridgelight, northlightor other. This unique modular feature makes the design process much more straightforward,leaving more time to develop aesthetics, ventilation properties, heat and daylight control etc.

Remote control	Power supply and control unit	Rain and wind sensor unit	Wall switch	Interface for external wall switch	Interface for external control devices
KLR 200	KLC 400	KLA S105	KLI 110	KLF 050	KLF 200

The main structural profiles of VELUX Modular Skylights consist of pultruded composite, containing approximately 80% continuous fibreglass treads and 20% two-component polyurethane resin.

The composite guarantees high heat insulating performance and thermal stability as well as excellent profile shiftiness and strength. In combination, the characteristics of the VELUX composite gives the slim profiles self-supporting strength and an ability to support installations of considerable size. In addition the material is maintenance-free, non-corrosive and electrical non-conductive.

In combination with low-energy glazing units the VELUX ­Modular Skylights are able to achieve one of the lowest overall U-values for frame and glazing assembly within the skylight market. 

HFC Frame for fixed skylight module	HVC Frame and sash for venting skylight module

Sources:
¹⁾ Accredited external tests   ²⁾ According to EN ISO 10077-2   ³⁾ Value identical to fibreglass   ⁴⁾ www.engineeringtoolbox.com   ⁵⁾ Internal VELUX test

VELUX Modular Skylights come with a standard low-energy double-glazing unit. Alternatively the skylight modules can be supplied with improved solar protection or a triple-glazing unit for extra-low U-value. All glazing units include a toughened outer glass layer and a 3+3 or 5+5 mm safety inner glass layer with two layers of 0.38 mm interlayer PVB foil. For technical values on glazing units, please refer to the chapter about Product Data.

The triple-glazing units have a heat-strengthened middle glass layer. Heat strengthened glass is also utilised for the inner pane of triple-glazed units with a 5+5mm inner pane.The cavity between the panes of the glazing units is filled with argon gas as a default.

All glazing units consist of a warm edge spacer and they areproduced with warm edge technology to minimise the risk of condensation at the pane edges to provide the glazing units with the most durable insulation capabilities.

Glazing with low emissivity coating (LowE)

T-value = 79%
g-value = 59%
Ra = 96.4

Glazing with light sun protection coating (Sun1)

T-value = 49%
g-value = 27%
Ra = 91.2

Glazing with advanced sun protection coating (Sun2)

T-value = 18%
g-value = 16%
Ra = 90.7

Classification: EN 12210

Classification of resistance to wind load
Wind load class	A	B	C
1	A1	B1	C1
2	A2	B2	C2
3	A3	B3	C3
4	A4	B4	C4
5	A5	B5	C5 •
Exxxx	Aexxxx	Bexxxx	Cexxxx

Note: In resistance to wind load classification the number refers to the wind load class, see table 1 and the letter to the relative frontal deflection, see table 2

•	VELUX modular skylights: Class C5 Frontal deflection measured at P1: 2000 Pa is less than L/300. 50 cycle pressure test P2: 1000 Pa After that repeated Air permeability test passed Safety test done at P3: 3000 Pa passed with no released part

Classification
A1, A2, B:	Non-combustable and not very combustable product. Over 20 minutes to flashover.
C:	Moderate combustable products. Between 10 and 20 minutes to flashover.
D:	Moderate combustable products. Between 2 and 10 minutes to flashover.
E:	Moderate combustable products.
F:	Highly combustable products (or products whose reaction to fire has not been assessed).

Sub-class
s1:	Low smoke production.
s2:	Medium smoke production.
s3:	High smoke production.

Flaming droblets sub-classification
d0:	No flaming droplets.
d1:	Flaming droplets that persist for less than 10 s.
d2:	Flaming droplets.

VELUX modular skylights: Clas B, s1-d0 or d2 B: Very low combustibility (A: Incumbustable eg steel and concrete) s1: Lowest smoke volume d0: No droplets in T pane variants d2: Droplets in standard pane variant

Classification: EN 13501-2+A1

Presentation of classification
Load bearing capacity	Integrity	Insulation
R	E	I

Fixed module (HFS): REI30
Venting module (HVS): EI30

Test 1 – with burning brands

Test 4 – two stages incorporating burning brands, wind and supplementary radiant heat

Classification: EN 13501-5 + A1

Test 1

Class	Classification criteria
BROOF (t1) •	All of the following conditions shall be satisfied for any one test: externel and internal fire spread upwards < 0,700 m external and internal fire spread downwards < 0.600 m maximum burned length external and internal < 0,800 m no burning material (droplets or debris) falling from exposed side no burning/glowing particles penetrate the roof construction no single through opening > 25 mm2 sum of all spreed opening < 4500 mm2 lateral fire spread does not reach the edges of the meassuring zone no internal glowing combustionmaximum radius of fire spread on “horizontal” roofs, external and internal < 0,200 m
FROOF (t1)	No performance determined.

Test 4

Class	Classification criteria
BROOF (t4) •	No penetration of roof system within 1 h. In preliminary test, after withdrawal of the test flame, specimens burn for < 5 min. In preliminary test, flame spread < 0,38 m across region of burning.
CROOF (t4)	No penetration of roof system within 30 min. In preliminary test, after withdrawal of the test flame, specimens burn for < 5 min. In preliminary test, flame spread < 0,38 m across region of burning.
DROOF (t4)	Roof system is penetrated within 30 min but is not penetrated in the preliminary test. In preliminary test, after withdrawal of the test flame, specimens burn for < 5 min. In preliminary test, flame spread < 0,38 m across region of burning.
EROOF (t4)	Roof system is penetrated within 30 min but is not penetrated in the preliminary test. Flame spread is not controlled.
FROOF (t1)	No performance determined.

•	VELUX modular skylights BROOF (t1) BROOF (t4)

Classification: EN 12208

Water tightness
Classification	Presure (Pa)	Wind (Km/h)
1 A	0	0
2 A	50	32
3 A	100	45
4 A	150	55*
5 A	200	63
6 A	250	71
7 A	300	78
8 A	450	95
9 A	600	110
E 750	750	123**
E 900 •	900	134

* Equal to depression
** Equal to tropical storm

•	VELUX modular skylights: E900 No water penetration up to 900 Pa. 900 Pa equals 134 Km/h.