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

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 projectspecific 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

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 characteristics

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

LN: 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 or 2 slot diffuser face
-DF: only front rail with B00 profile and cross bar for fixing
-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

Symmetric position of plenum box, side entry spigot (HS)
Symmetric position of plenum box, top entry spigot (VS)
Asymmetric position of plenum box, side entry spigot (HA)

Construction

Surface diffuser face

Anodised, E6-C-0, natural colour
P1: Powder-coated RAL 9010, pure white, GU 50
P1: Powder-coated RAL 9006, white aluminium, GU 30
P1: Powder-coated in any other RAL CLASSIC colour, GU 70

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 grooves to lock the elements for a particular air pattern
Spigot with groove for lip seal (only for lip seal version)
Diffuser face sizes from 600 to 2000 mm, in increments of 1 mm
Plenum boxes are 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)
The optionally available neck extension in the standard dimensions 22, 47, 72, 97 and 121 mm can be used to compensate for structural conditions
Diffuser face fixing material for variants -SF and -DS supplied separately

Materials and surfaces

Diffuser face made from extruded aluminium section
Air control blades 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 blades similar to RAL 9005, jet black
G: Air control elements similar to RAL 9006, grey
W: Air control blades similar to RAL 9010, white

Mineral wool

Mineral wool on surfaces in contact with air laminated with glass fibre fabric, abrasion-resistant up to 20 m/s
Acc. to EN 13501, fire rating class A1, non-combustible
RAL quality mark RAL-GZ 388
Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (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 there is no wear and tear due to design and materials used
Inspection and cleaning according to VDI 6022

Disclosure of Chemicals

RoHS EU Directive 2011/65/EU (RoHS)

This product or single variants comply with EU Directive 2011/65/EU (RoHS) on the restriction of the use of certain hazardous substances in electrical and electronic equipment. For more information, please refer to our Environmental Product Declarations.

REACH 1907/2006 (EC Regulation REACH)

This product or single variants comply with the provisions of EC Regulation No. 1907/2006, also known as REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). For more information, please refer to our Environmental Product Declarations.

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

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Specification text

Slot diffusers of Type PURELINE18 with individually manually adjustable air control elements and 1 or 2 slots.

Air distribution can be alternating horizontal, alternating angled, vertical, one-way horizontal to the left or one-way horizontal to the right.

The slot diffusers are intended to be installed in suspended ceilings and are suitable for supply air and extract air. Ready-toinstall component which consists of a diffuser face with black, grey or white air control elements.

Variants with plenum box have 1 or 2 spigots. Symmetrically positioned plenum boxes may have side entry or top entry spigots. Asymmetrically positioned plenum boxes have only side entry spigots.

The plenum boxes are fitted with 4 suspension lugs.

The diffuser face fixing can be detachable or non-detachable.

Spigots are suitable for circular ducts according to EN 1506 or EN 13180. The sound power level of air-regenerated noise is measured according to EN ISO 5135.

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 due to extruded aluminium sections with anodised finish or powder coating (RAL CLASSIC colour)
The diffuser face has been optimised for maximum volume flow rate at low sound power levels
Suitable for continuous linear arrangement

Materials and surfaces

Diffuser face made from extruded aluminium sections
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 is mineral wool with vinyl closed cell foam
Diffuser face with anodised finish, E6-C-0, natural colour
P1: Powder-coated, RAL CLASSIC colour
Air control elements similar to RAL 9005, black
G: Air control elements similar to RAL 9006, grey
W: Air control elements 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

Construction

Surface diffuser face

Anodised, E6-C-0, natural colour
P1: Powder-coated RAL 9010, pure white, GU 50
P1: Powder-coated RAL 9006, white aluminium, GU 30
P1: Powder-coated in any other RAL CLASSIC colour, GU 70

Technical data

Nominal lengths: 600 – 2000 mm, in increments of 100 mm
Diffuser face: 1 slot or 2 slots
Minimum volume flow rate, with Δtz = -10 K: 5 l/s or 17 m³/h
Maximum volume flow rate with LWA ≅ 50 dB(A): 84 l/s or 302 m³/h
Supply air to room air temperature difference: -10 to +10 K

Sizing data

qv [m³/h]
Δpt [Pa]
LWA [dB(A)]

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 (standard: without air control blades)
E1 Extract air (with air control blades)

4 Variant

DF Front rail with crossbar (only with B00)
DS Front rail with fixing screws (only with B00)
CD Transfer rail
BD Blind rail
PB Plenum box only
PF Front rail fixed to the plenum box, non-detachable
SF Front rail fixed to the plenum box, detachable (only with B00)

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

6 Nominal size [mm]

Front rail length × plenum box length × spigot diameter × neck extension

Front rail 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)

Neck extension
No entry: without neck extension
21, 46, 71, 96, 120

7 Number of spigots
1 (up to plenum box length 1200 mm)
2 (from plenum box length 900 mm)

8 Damper blade for volume flow 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
Rl right

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

13 Extended border – front rail
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 GU 50
RAL 9006 GU 30
All other RAL colours GU 70

16 Colour of air control blades
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-SF-HS/1200×1000×98×21/2-D-LS-L-RI/AS/B00/EA/P1-RAL9016/W

Type	PL18 - Slot diffuser PURELINE18
Number of slots	1
System	Supply air
Variant	Front rail fixed to the plenum box, detachable
Plenum box variant	Symmetrical, with horizontal connection
Nominal size [mm]	Front rail length 1200× plenum box length 1000× spigot diameter 98× neck extension 21
Number of spigots	2
Damper blade for volume flow balancing	with damper blade
Lip seal	with lip seal
Lining	With lining
Position of plenum box	right
Airflow settings	Alternating angled
Extended border Front rail	With extended border
End pieces	End angle
Surface	Powder-coated, RAL 9016 (traffic white)
Colour of air control blades	Similar to RAL 9010 (pure white)

Downloads

product information

Product data sheet PURELINE18

PURELINE18_PD_2026_03_02_DE_en Product data sheet 1,6 MB pdf
The clean solution!

Air terminal devices – PURELINE slot diffuser 660 KB pdf

certificates

Declaration of hygiene conformity Type PURELINE18

PURELINE18_HC_2025_10_en Declaration of hygiene conformity 840 KB pdf
Environmental Product Declaration Pureline 18

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

PURELINE18_MS_CE_2026_01_DE_en Manufacturer's statement 700 KB 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 Type PURELINE18

Environmental Product Declaration Pureline 18

Non-CE Manufacturer's statement PURELINE18

operation manuals

Installation manual PURELINE18

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