PURELINE18

Spigot with optional damper blade and optional lip seal

Alternating horizontal air discharge

Detachable diffuser face fixing

PL18-2/.../B00/P1-RAL 9010, installation in continuous ceilings

Available online - configure now

PURELINE18

Particularly slim diffuser face, available in many variants and with various air pattern options for many installation situations

Slot diffusers with 18 mm diffuser face (nominal width) and adjustable air control elements
■ Volume flow rate range 5 – 84 l/s or 17 – 302 m³/h
■ Individually adjustable air control elements for horizontal, angled or vertical air discharge
■ One-way or alternating air discharge allows for meeting local and project-specific requirements
■ Uniform air pattern reduces contamination of the ceiling due to induced room air
■ Air control elements have grooves that allow for precise positioning

Optional equipment and accessories
■ Attractive appearance due to extruded aluminium sections with anodised finish or powder coating
■ Diffuser face can be placed symmetrically or asymmetrically
■ Plenum box with lining
■ End plates, end angles, corner sections

■ Different looks due to choice of black, grey or white air control elements■ Different looks due to choice of black, grey or white air control elements

Initialize order code

General information

Application

Slot diffusers are used as supply air or extract air devices in comfort zones
Particularly unobtrusive diffusers due to their sleek design
Installation into suspended ceilings
For room heights up to 4 m (lower edge of suspended ceiling)
For suspended ceilings; suitable for restricted ceiling voids
due to the low overall height of the plenum box
Suitable for continuous linear arrangement
Adjustable air control elements allow for horizontal, angled or
vertical air discharge
Mixed flow system with one-way or alternating air discharge,
can be adapted to the building structure
High induction results in a rapid reduction of the temperature
difference and airflow velocity (supply air variant)
For variable and constant volume flows
For supply air to room air temperature differences from -10 to +10 K

Special features

Uniform air pattern reduces contamination of the ceiling due to induced room air
Horizontal, angled or vertical air discharge by means of manually adjustable air control elements
Comfortable indoor climate due to high induction and rapid reduction of temperature differences and airflow velocities
Attractive appearance thanks to anodised extruded aluminium sections (E6-C-0, natural colour) or powder coating (RAL CLASSIC colour)
Diffuser face has been optimised for maximum volume flow rate at low sound power levels
Suitable for continuous linear arrangement

Nominal sizes

FLN: 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000 mm
Intermediate sizes of the diffuser face are also available (in increments of 1 mm)

Variants

PL18-... :

-*: 1 to 2 slots
-DF: only front rail with B00 profile and spring clip
-DS: only front rail with B00 profile and screw fixing
-PB: Plenum box only (for combination with DS)
-PF: Combination of diffuser face and plenum box with fixed connection
-SF: Combination of diffuser face and plenum box with detachable screw fixing
-CD: Overflow rail which can be integrated into a slotted belt. The front rail has openings at the back through which air can flow. The fixing of the overflow rail must be done on site. The supplied connectors are used only for positioning and aligning the overflow rail
-BD: Blind rail that can be integrated into a slotted band. The diffuser face is closed on the reverse side so that there is no air flow through the blind rail. The blind rail must be fixed on site. The supplied connectors are used only for positioning and aligning the overflow rail
-CS: Corner section

Position of the plenum box on the diffuser face, if the plenum box is shorter than the diffuser face

Central position of plenum box
Plenum box on the left (LE)
Plenum box on the right (RI)

Plenum box variant

Symmetrical plenum box with horizontal connection (HS)
Symmetrical plenum box with vertical connection (VS)
Asymmetrical plenum box with horizontal connection (HA)

Construction

Diffuser face finish

With anodised finish, E6-C-0, natural colour
P1: Powder-coated RAL 9010, pure white, GU50
P1: Powder-coated RAL 9006, white aluminium, GU30
P1: Powder-coated in any other RAL CLASSIC colour, GU70

Attachments

D: Damper blade for volume flow rate balancing
LS: Lip seal
L: inner lining
EP: 2 end plates
EA: 2 end angles

Single diffusers are factory fitted with end plates or end angles. Either end plates or end angles can be used for the front end for continuous linear arrangements.

Accessories

EP: 2 end plates
EA: 2 end angles

For slot diffusers as continuous linear arrangement, the end plates or end angles must be ordered separately and installed on site. 2 alignment plates for connecting the front rails to each other are supplied separately with each slot diffuser without a factory-fitted end piece.

Construction features#

Spigot suitable for circular ducts to EN 1506 or EN 13180
4 suspension lugs on plenum box for mounting by the customer
Manually adjustable air control elements with detent for defined adjustment of the air distribution
Spigot with groove for lip seal (only for lip seal version)
Diffuser face available in mm increments between 600 and1950 mm
Plenum boxes only available in nominal lengths
Extract air variant without air control elements (E)
If the diffuser face is longer than the plenum box, the rear side of the protruding diffuser face ends are covered.
Factory set for a particular air pattern, manually adjustable on site (by others)
Diffuser face fixing material for variants -SF and -DS supplied separately

Materials and surfaces

Diffuser face made from extruded aluminium section
Air control elements made of ABS plastic, UL 94, V-0, flame retardant
Plenum box made of galvanised sheet steel
End plates and end angles made of aluminium
Lip seal made of Evoprene
Lining made of mineral wool and closed-cell vinyl foam
Diffuser face with anodised finish, E6-C-0, natural colour
P1: powder-coated colour according to RAL CLASSIC
Air control elements similar to RAL 9005, black
G: Air control elements similar to RAL 9006, grey
W: Air control blades similar to RAL 9010, white

Mineral wool

Mineral wool faced with glass fibre fabric on the surfaces in contact with the air, abrasion-resistant up to 20 m/s
To EN 13501, fire rating class A1, non-combustible
RAL quality mark RAL-GZ 388
Non-hazardous to health thanks to being highly biosoluble in accordance with the Ordinance on Hazardous Substances and Note Q of the European Directive (EC) No. 1272/2008
Inert to fungal and bacterial growth

Standards and guidelines

Sound power level of the air-regenerated noise measured according to EN ISO 5135
Conforms to VDI 6022

Maintenance

Low maintenance as construction and materials are not subject to wear and tear
Inspection and cleaning to VDI 6022

TECHNICAL INFORMATION

Schematic illustration of PL18-*-SF

1 Diffuser face, 1 slot or 2 slots

2 Adjustable air control element
3 Screw fixing
6 Neck
7 Plenum box
8 Suspension lug
9 Spigot

Optional

4 End plate
5 End angle
10 Lip seal
11 Damper blade for volume flow rate balancing

Slot diffusers direct the supply air from ventilation and air conditioning systems into the room, either horizontally, at an angle or vertically. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and indoor air. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone. Type PURELINE18 slot diffusers are factory fitted with manually adjustable air control elements. The airflow direction can be adjusted to meet various local requirements. Air discharge is one-way or alternating. Heating operation with vertical flow is also possible, as is angled air discharge. The supply air to room air temperature difference may range from –10 to +10 K. A damper blade (optional) enables volume flow rate balancing for commissioning. To give rooms an aesthetic, uniform look, Type PURELINE18 diffusers may also be used for extract air.

Nominal lengths	600 – 2000 mm, in increments of 100 mm
Number of slots	1 or 2
Neck extension	21, 46, 71, 96, 120 mm
minimum volume flow rate at Δtz = -10 K	5 l/s or 17 m³/h
maximum volume flow rate, at LWA ≅ 50 dB(A)	84 l/s or 302 m³/h
Supply air to room air temperature difference	-10 – +10 K

PL18

–

1200 × 1000 × 98

–

B00

P1 - RAL 9016

1 Type
PL18 Slot diffuser PURELINE18

2 No. of slots
1, 2

3 System
S Supply air
E Extract air (without air control elements as standard)
E1 Extract air (with air control elements)

4 Variant
DF Diffuser face with spring clip (only together with B00)
DS Diffuser face with fixing screws (only together with B00)
CD Air transfer section
BD Non-active diffuser
PB Plenum box only
PF Diffuser face fixed to the plenum box, non-detachable
SF Diffuser face fixed to the plenum box, detachable (only together with B00)

5 Plenum box variant
HS Symmetrical, with horizontal spigot
VS Symmetrical, with vertical spigot
HA Asymmetrical, with horizontal spigot

6 Nominal size [mm]
Diffuser face length × plenum box length × spigot diameter

Diffuser face length
600 – 2000

Plenum box length
600 – 2000 (in increments of 100 mm)

Spigot diameter
78 (with 1 slot)
98 (with 1 or 2 slots)
123 (with 2 slots)

7 No. of spigots
1 (up to plenum box length 1200 mm)
2 (from plenum box length 900 mm)

8 Damper blade for volume flow rate balancing
No entry: without damper blade
D With damper blade

9 Lip seal
No entry: without lip seal
LS With lip seal

10 Lining
No entry: without lining
L With lining

11 Position of plenum box
No entry: centre
LE Left side
Rl Right side

12 Air pattern
No entry: alternating horizontal
AS Alternating angled
HL Horizontal left
HR Horizontal right
V Vertical

13 Extended border – diffuser face
No entry: without extended border
B00 With extended border

14 End pieces
No entry: without end pieces
EP End plate
EA End angle
To be ordered separately for continuous linear runs

15 Surface
No entry: anodised, E6-C-0 (no colour)
P1 Powder-coated, specify RAL CLASSIC colour

Gloss level
RAL 9010 GU50
RAL 9006 GU30
All other RAL colours GU70

16 Colour of air control elements
No entry: similar to RAL 9005 (jet black)
W Similar to RAL 9010 (pure white)
G Similar to RAL 9006 (white aluminium)Order example: PL18-1-S-PF-HS/1200×1200×98/1

Type	PURELINE18
Number of slots	1
System	Supply air
Variant	Diffuser face fixed to the plenum box, non-detachable
Plenum box variant	Symmetrical plenum box with side entry spigot
Nominal size	Diffuser face 1200 mm, plenum box 1200 mm, spigot diameter 98 mm
No. of spigots	1
Damper blade for volume flow rate balancing	Without
Lip seal	Without
Lining	Without
Position of plenum box	Centre
Air pattern	Alternating horizontal
Extended border	Without
End pieces	Without
Surface	Anodised, E6-C-0, natural colour
Colour of air control elements	Black

PL18

–

100 × 100 × 90

B00

P1 - RAL 9016

1 Type
PL18 Slot diffuser PURELINE18

2 No. of slots
1, 2

3 System
S Supply air
E Extract air (without air control elements as standard)
E1 Extract air (with air control elements)

4 Variant
CS Corner section

5 Dimensions
Leg length E [mm]
100 – 300 (in increments of 1 mm)

Leg length F [mm]
100 – 300 (in increments of 1 mm)

Angle [°]
45 – 175 (in increments of 1 degree)

6 Extended border – diffuser face
No entry: without extended border
B00 With extended border

7 Surface
No entry: anodised, E6-C-0 (no colour)
P1 Powder-coated, specify RAL CLASSIC colour

Gloss level
RAL 9010 GU50
RAL 9006 GU30
All other RAL colours GU70

8 Colour of air control elements
No entry: similar to RAL 9005 (jet black)
W Similar to RAL 9010 (pure white)
G Similar to RAL 9006 (white aluminium),

PL18	–	EA	/	2	–	B00	/	P1 - RAL 9016
\|		\|		\|		\|		\|
1		2		3		4		5

1 Type
PL18 Slot diffuser PURELINE18

2 Variant
EP 1 pair of end plates
EA 1 pair of end angles

3 No. of slots
1, 2

4 Extended border
No entry: without extended border
B00 With extended border

5 Surface
No entry: anodised, E6-C-0 (no colour)
P1 Powder-coated, specify RAL CLASSIC colour

Gloss level
RAL 9010 GU50
RAL 9006 GU30
All other RAL colours GU70

Downloads

product information

Product data sheet PURELINE18

PURELINE18_PD_2026_01_21_DE_en Product data sheet 1,5 MB pdf
The clean solution!

Air terminal devices – PURELINE slot diffuser 660 KB pdf

certificates

Declaration of hygiene conformity PURELINE18

PL18_HC_2024_05_DE_en Certificate 1,2 MB pdf
Environmental Product Declaration Pureline 18

Pureline18_EPD_2024_11_DE_en Environmental Product Declaration 1 MB pdf
Non-CE Manufacturer's statement PURELINE18

PL18_NotCE_2022_02_08_14_37_50_DE_en Certificate 1,2 MB pdf

operation manuals

Installation manual PURELINE18

PL18_IM_A00000063831_V4_2026_01_14_GB_en Installation manual 950 KB pdf

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PURELINE18

Particularly slim diffuser face, available in many variants and with various air pattern options for many installation situations

General information

TECHNICAL INFORMATION

Downloads

product information

Product data sheet PURELINE18

The clean solution!

certificates

Declaration of hygiene conformity PURELINE18

Environmental Product Declaration Pureline 18

Non-CE Manufacturer's statement PURELINE18

operation manuals

Installation manual PURELINE18

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