TSD

Plenum box with side entry connection

Spigot with optional damper blade

Plenum box with top entry connection

Flat face slot diffuser, available in numerous variants for many different installation situations

Slot diffusers with 15 mm or 20 mm diffuser face (nominal width) and adjustable air control blades
■ Nominal length 300 – 1800 mm, 1, 2, 3 or 4 slots
■ Volume flow rate range 3 – 360 l/s or 12 – 1297 m³/h
■ Adjustable air control blades for horizontal or vertical air discharge
■ Uniform air pattern increases comfort and reduces noise level
■ Air control blades have positive stop to allow for precise positioning on site

Optional equipment and accessories
■ Attractive appearance due to extruded aluminium sections with RAL CLASSIC polyester powder-coat finish
■ Variable height plenum box with optional internal lining and spigot mounted damper for volume flow rate balancing
■ End plates, end angles, mitred corner sections
■ Different looks due to choice of black or white air control blades

General information

Application

Type TSD slot diffusers are used as supply air or extract air devices in comfort zones
Unobtrusive diffuser due to its sleek flat face design
Installation into suspended ceilings or plasterboard margin
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 or vertical air discharge
Mixed flow system with adjustable 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 increases comfort and reduces noise level
Horizontal, or vertical air discharge by means of manually adjustable air control blades
Comfortable indoor climate due to high induction and rapid reduction of temperature differences and airflow velocities
High-quality look thanks to extruded aluminium sections with RAL CLASSIC polyester powder coating
Diffuser face has been optimised for maximum volume flow rate at low sound power levels and low pressure
Suitable for continuous linear arrangement

Nominal sizes

Single diffuser

LN : 300mm up to 1800mm

Linear diffuser

LN : > 1801mm & ≤ 3600mm linear diffusers supplied as two equal length end sections

LN : > 3600mm linear diffusers supplied as n x 1800mm middle section(s) and two equal length end sections.

For a continuous linear arrangement the diffuser should be ordered with total run nominal length. Diffuser will be supplied in sections (2 x equal length end sections or n x 1800mm middle

sections and 2 x equal length end sections depending on nominal length) with alignment pins for joining on site by others. End plates or end angles have to be specified and will be factory

fitted to diffuser end sections.

Intermediate sizes in 1mm increments available on request.

Variants

TSD15-*: 1, 2, 3 or 4 slots (15mm slot)
TSD20-*: 1, 2, 3 or 4 slots (20mm slot)
TSD**-0: Continuous air control blade for oneway horizontal or vertical airflow
TSD15-*-0-B: Black air control blades
TSD15-*-0-W: White air control blades
TSD**-*-FL: Extended flange for surface mounting
TSD**-*-NF: No-flange for flush mounting
TSD**-*-PL: Extended border to suit plank ceiling systems (300 mm wide). TSD20-3 or 4 slot only
TSD**-*-P: Plaster-in border
TSD-CS: Mitred corner section

Attachments

A'x': End angles (*-FL border only)
P'x': End plates (*-NF, -P borders only)
L'x': Offset angles (*-NF border only)
PL'x': End angles (*-PL border only)

'x': Quantity 1 or 2. Diffusers are factory fitted with end plates or angles.

Construction features

High quality aluminium extrusions with flat face profiles
Manually adjustable air control elements with positive stop that makes it easier to adjust the airflow direction
Continuous air control blades for one-way or vertical air direction control
Diffuser face sizes from 300 to 1800 mm, in increments of 1 mm
Plenum box nominal lengths 300 to 1800 mm, in increments of 100mm

Material and surfaces

TSD diffuser face and air control blades made from extruded aluminium sections
End plates made of galvanised sheet steel
End angles made of aluminium
TSD-AKV: Plenum box made of galvanised sheet steel
TSD-RA: Extract air plenum box made of galvanised sheet steel, powder-coated RAL 9005, black
Optional with 5 mm inner thermal insulation lining, Class 0 rated
Diffuser face powder-coated finish RAL 9010, pure white, GU 50%, or anodised E6-C-0
P1: Powder-coated in RAL CLASSIC colours
B: Air control blades similar to RAL 9005, black
W: Air control blades similar to RAL 9010, white

Standards and guidelines

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

Maintenance

Maintenance-free as construction and materials are not subject to wear
Inspection and cleaning to VDI 6022

TECHNICAL INFORMATION

{249}

1 TSD diffuser face; 1, 2, 3 or 4 slots
2 Air control blade
3 End plate/angle (optional)
4 Concealed plenum fixing S11 (optional)
5 AKV TSD plenum box
6 Plenum box support hole (11 × 7)
7 Plenum box support bracket (11 × 7)
8 Spigot
9 Spigot damper (optional)

Slot diffusers direct the air from air conditioning systems into the room, either horizontally 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 room 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 TSD slot diffusers are factory fitted with manually adjustable air control blades. The diffuser can be supplied with continuous air control blades for one-way/two-way horizontal airflow or vertical airflow or blades made up of 300mm sections for alternating horizontal airflow to provide additional control to meet different local requirements. Air discharge is one-way (1 slot) or two-way (2 or more slots) or alternating (AH). Other patterns: heating mode with vertical air discharge. The supply air to room air temperature difference may range from –10 to +10 K. A damper blade (optional) simplifies volume flow rate balancing for commissioning. To give rooms an aesthetic, uniform look, Type TSD diffusers may also be used for extract air. Type TSD-AKV plenum boxes and return air baffles are available to suit the local requirements of the installation with optional 12mm internal lining.

TSD15

Nominal lengths	300 – 1800 mm, in increments of 1 mm
No. of slots	1, 2, 3 or 4
Minimum volume flow rate, with Δtz = -10 K	3 l/s or 12 m³/h
Maximum volume flow rate, with LWA ≅ 50 dB(A)	293 l/s or 1055 m³/h
Supply air to room air temperature difference	–10 to +10 K

TSD20

Nominal lengths	300 – 1800 mm, in increments of 1 mm
No. of slots	1, 2, 3 or 4
Minimum volume flow rate, with Δtz = -10 K	4 l/s or 15 m³/h
Maximum volume flow rate, with LWA ≅ 50 dB(A)	360 l/s or 1297 m³/h
Supply air to room air temperature difference	–10 to +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 TSD, with 15 or 20mm nominal slot width, individually manually adjustable air control blades and 1, 2, 3 or 4 slot configuration. Factory fitted with manually adjustable air

control blades. The diffuser can be supplied with continuous air control blades for one-way/two-way horizontal airflow or vertical airflow or blades made up of 300mm sections for alternating

horizontal airflow to provide additional control to meet different local requirements. The slot diffusers are intended to be installed in suspended ceilings and are suitable for supply air and extract

air. Ready-to-install component which consists of a diffuser face with a choice of black or white air control blades. TSDAKV plenum boxes have 1 or 2 spigots with side entry or top entry connection. The plenum boxes are fitted with 4 suspension lugs with optional 12mm internal lining. Side entry spigots can be fitted with optional spigot mounted damper for volume flow rate

balancing. 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 characteristics

Uniform air pattern increases comfort and reduces noise level
Horizontal, or vertical air discharge by means of manually adjustable air control blades
Comfortable indoor climate due to high induction and rapid reduction of temperature differences and airflow velocities
High-quality look thanks to extruded aluminium sections with RAL CLASSIC polyester powder coating
Diffuser face has been optimised for maximum volume flow rate at low sound power levels and low pressure
Suitable for continuous linear arrangement

Construction

Diffuser face finish

P3: Powder-coated RAL 9010, pure white, gloss level 20%
P2: Powder-coated RAL 9006, white aluminium, gloss level 30%
P4: Powder-coated RAL 9005, black gloss level 20%
P6: Powder-coated in any other RAL CLASSIC colour, gloss level 30%

Material and surfaces

TSD diffuser face and air control blades made from extruded aluminium sections
End plates made of galvanised sheet steel
End angles made of aluminium
TSD-AKV: Plenum box made of galvanised sheet steel
TSD-RA: Extract air plenum box made of galvanised sheet steel, powder-coated RAL 9005, black
Optional with 5 mm inner thermal insulation lining, Class 0 rated
Diffuser face powder-coated finish RAL 9010, pure white, GU 50%, or anodised E6-C-0
P1: Powder-coated in RAL CLASSIC colours
B: Air control blades similar to RAL 9005, black
W: Air control blades similar to RAL 9010, white

Technical data

Nominal length: 300 – 1800 mm, in increments of 1mm
Number of slots: 1, 2, 3 or 4
Minimum volume flow rate, with Δtz = –10 K: 3 l/s or 12 m³/ h
Maximum volume flow rate, with LWA ≅ 50 dB(A): 360 l/s or 1296 m³/h
Supply air to room air temperature difference: –10 to +10 K

Sizing data

qv [l/s, m³/h]
Δpt [Pa]

Air-regenerated noise

LWA [dB(A)]

TSD

–

1800

S11

P6 - 9016:30%

1 Type
TSD TSD slot diffuser

2 Slot width
15 15mm slot diffuser
20 20mm slot diffuser

3 Number of slots
1 1 slot
2 2 slots
3 3 slots
4 4 slots

4 Airflow type
No entry: alternating horizontal (TSD20, white blades only)
0 one-way air discharge (black blades only)

5 Diffuser style
B Black blades
W White blades

6 Border style
FL Flanged
NF No flange
P Plaster-in
PL Plank (TSD20-3 / 4 only)

7 End cap
0 Without
Ax Angle (border style FL only)
Px Plate (border style NF, P only)
Lx Offset angle (border style NF only)
PL2 Plank (border style PL only)
'x': quantity required 1 or 2

8 Nominal diffuser length (mm)
Single diffuser
Min: 300mm / Max: 1800mm

Linear diffuser
Min: 1801 mm / Max: 3600mm
Linear diffuser: 2 x equal length end sections

Min: 3601 mm / Max: n/a
Linear diffuser: 'n' x 1800mm middle sections + 2 x equal length end sections

9 Fixings
0 No fixings (border style P only)
SB With support bracket for diffuser installation without plenum box (border style FL, NF, PL only)
GP With goal-post bracket for diffuser installation without plenum box (border style FL, NF only)
S11 Concealed fixing for use with TSD-AKV & RA plenum boxes (border style FL, NF, PL only). Includes 1x GP (border style FL, NF) or 2x SB (border style PL)

10 Finish
P2 Powder-coat RAL 9006, Gloss level 30%
P3 Powder-coat RAL 9010, Gloss level 20%
P4 Powder-coat RAL 9005, Gloss level 20%
P6 Powder-coat RAL CLASSIC, Gloss level 30%

Order example: TSD20-2-0-B-FL-A2 / 1200 / S11 / P6 - 9003:30%

TSD slot type	TSD20 (20mm nominal slot width)
Number of slots	2
Airflow type	One-way air discharge (Continuous blade)
Diffuser style	Black blades
Border style	Flanged border
End cap	Angle ends (2 off)
Nominal diffuser length	1200mm
Fixings	Concealed fixings and goal-post fixings
Finish	RAL 9003:30%

Order example: TSD20-3-W-P-P2 / 4200 / 0 / P3 - 9010:20%

TSD slot type	TSD20 (20mm nominal slot width)
Number of slots	3
Airflow type	alternating horizontal
Diffuser style	White blades
Border style	Plaster-in border
End cap	Plate (2 off)
Nominal diffuser length	1x 1800mm middle and 2x 1200mm end sections
Fixings	No fixings
Finish	RAL 9010:20%

Downloads

product information

Product data sheet TSD

TSD_-Version-UK-_PD_2025_10_20_DE_en Product data sheet 1,2 MB pdf

certificates

Non-CE Manufacturer statement - Type TSD

TSD--AKV-TSD_Not_CE_2023_08_10_DE_en | Type TSD 670 KB pdf

operation manuals

Type TSD Slot DIffuser

TSD_IOM_2023_06_16_UK_en | Installation and Operation Manual Installation instructions - Type TSD Slot DIffuser 12 MB pdf

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