QSH

FOR INDUSTRIAL ZONES WITH AIR POLLUTING PROCESSES

Displacement flow diffusers with bell-shaped, low turbulence air discharge in cooling mode

Nominal sizes 250, 355, 450, 560 mm
Volume flow rate range 205 – 1570 l/s or 738 – 5652 m³/h
Casing made of galvanised sheet steel
For variable and constant volume flows
Installation either free hanging or on walls or pillars
Low-turbulence displacement ventilation
Discharge direction can be adjusted manually or with an actuator
Chain pull for adjusting the discharge direction manually

Optional equipment and accessories

Exposed diffuser parts in RAL CLASSIC colours
Electric and thermal actuators for adjusting the air discharge direction
Bowden cable for adjusting the discharge direction manually
Wall mount

Application

Application

Type QSH displacement flow diffusers are used primarily for industrial zones with air polluting work processes
Bell-shaped air discharge in cooling mode, vertical air discharge in heating mode
Low-turbulence displacement of polluted or contaminated air in the occupied zone
For variable and constant volume flows
For supply air to room air temperature differences from –8 to +12 K
Installation at heights between 3.5 m and 10 m, either free hanging or on walls or pillars
Installation preferably outside of occupied zones, e.g. in corridors
Ideal for use with TDC temperature difference control module

Special characteristics

Bell-shaped, low-turbulence air discharge in cooling mode
Air discharge direction is adjusted manually or with an electric or thermal actuator

Nominal sizes

250, 355, 450, 560 mm

Description

Parts and characteristics

Perforated sheet metal casing
Air control disc to control the air discharge direction
Top entry spigot for connection to a vertical duct

Attachments

Chain pull for manual adjustment, approx. 2.0 m
B: Bowden cable for manual adjustment, approx. 2.8 m
E*: Electric actuator
T: Thermal actuator

Accessories

W00: Wall mount
K00: Chain fixing
WK0: Wall mount and chain fixing

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180

Materials and surfaces

Casing with base plate, cross bar and air control disc made of galvanised sheet steel
Chain pull made of galvanised steel
Pulley wheels made of plastic, UL 94, V-0, flame retardant
B: Hand lever made of galvanised steel, Bowden cable made of galvanised steel and with PE sheath
P0: Powder-coated RAL 9010, pure white
P1: Powder-coated, RAL CLASSIC colour

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

Function, Technical data, Quick sizing, Specification text, Order code

Schematic illustration of QSH with electric actuator

① Casing
② Base plate
③ Air control disc
④ Cross bar
⑤ Spigot
Optional
⑥ Cable gland
⑦ Electric actuator

Functional description

Displacement flow diffusers discharge the air from air conditioning systems vertically and with a low velocity into the room, causing very little turbulence. This results in a very good air quality in the occupied zone.

Type QSH displacement flow diffusers are used primarily for industrial zones with air polluting work processes. They are installed preferably outside of occupied zones, e.g. high up in corridors. An adjustable air control disc allows for adapting the air discharge direction to heating or cooling mode. The supply air to room air temperature difference may range from –8 to +12 K.

Cooling mode

In cooling mode the supply air is discharged outside the occupied zone, from above and in a bell-shaped air pattern. This creates a pool of fresh air over the entire floor area, similar to displacement ventilation where the air is supplied near the floor. The convection from people and other heat sources causes the fresh air from the pool to rise and create comfortable conditions in the occupied zone.

Heating mode

In heating mode the air is discharged vertically.

The air control disc can be adjusted manually or with a thermal or electric actuator.

Extract air units should be installed in the upper part of a room, above the occupied zone.

Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

The maximum volume flow rates apply to a sound power level of approx. 55 dB (A).

Sizing example

Given data

V = 500 l/s (1800 m³/h)

Displacement flow diffuser for installation in corridors

Maximum sound power level 50 dB(A)

Quick sizing

Type QSH

Nominal sizes: 355, 450

Selected: QSH/355

QSH supply air, horizontal air discharge, sound power level and total differential pressure

Nominal size	V		Δp_t	L_WA
Nominal size	l/s	m³/h	Pa	dB(A)
250	205	738	12	31
250	270	972	20	41
250	340	1224	32	48
250	410	1476	47	55
355	335	1206	11	34
355	435	1566	18	43
355	535	1926	27	50
355	635	2286	39	55
450	470	1692	9	27
450	625	2250	16	39
450	780	2808	25	48
450	940	3384	36	55
560	785	2826	14	29
560	1050	3780	25	40
560	1310	4716	39	49
560	1570	5662	56	55

QSH supply air, vertical air discharge, sound power level and total differential pressure

Nominal size	V		Δp_t	L_WA
Nominal size	l/s	m³/h	Pa	dB(A)
250	205	738	12	36
250	265	954	21	44
250	335	1206	33	51
250	385	1386	44	55
355	335	1206	11	38
355	420	1512	17	45
355	505	1818	25	51
355	590	2124	34	55
450	470	1692	10	33
450	595	2142	16	42
450	725	2610	24	49
450	855	3078	33	55
560	785	2826	15	36
560	990	3564	24	45
560	1180	4248	34	51
560	1370	4932	46	55

Accessories, Dimensions and weight, Product details

Wall mount (accessory) 00205500_0

① Diffuser
② Centre of diffuser
③ Wall mount, inner part
④ Wall mount, outer part
⑤ Wall bracket

QSH

Chain pull for manual adjustment

QSH

Nominal size	ØD₁ mm	ØD mm	m kg
250	252	248	4.8
355	357	353	7.2
450	452	448	9.9
560	562	558	12.8

Chain fixing

① Chain fixing

Installation details, Basic information and nomenclature

Installation above the aisle area

For industrial zones with air polluting work processes
Installation preferably outside of occupied zones, e.g. in corridors

Installation and commissioning

Installation preferably at heights between 3.5 m and 10 m
Freely suspended installation
Vertical duct connection
The spigot has to be screw-fixed to the duct and the entire system has to be securely fixed and suspended (by others)
Fixing to walls or pillars with optional wall mount
Attach the chain fixing and the hand lever of the Bowden cable to the wall or pillar, if necessary

These are only schematic diagrams to illustrate installation details.

Downloads

product information

Product data sheet Actuators – Heating/Cooling

PD_2017_03_Heating_cooling_DE_en Product data sheet 670 KB pdf
Product data sheet Actuators – Thermal actuators

PD_2017_03_Thermal_DE_en Product data sheet 230 KB pdf
Product data sheet Actuators – Modulating actuators

PD_2017_03_Variable_DE_en Product data sheet 430 KB pdf
Product data sheet Type QSH

Product data sheet 1,4 MB pdf

certificates

Environmental Product Declaration QSH

QSH_EPD_2024_11_DE_en Environmental Product Declaration 940 KB pdf
Non-CE Manufacturer's statement QSH

QSH_NotCE_2022_02_08_14_32_26_DE_en Certificate 1,2 MB pdf

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Nominal sizes	250, 355, 450, 560 mm
Minimum volume flow rate	205 – 785 l/s or 738 – 2826 m³/h
Maximum volume flow rate, with L_WA ≅ 55 dB(A)	410 – 1570 l/s or 1476 – 5652 m³/h
Supply air to room air temperature difference	–8 to +12 K

Actuator	24 V AC/DC, 3-point
Nominal size	450 mm
Fixing	Without
Exposed surface	RAL 9016, traffic white, gloss level 70 %

QSH

FOR INDUSTRIAL ZONES WITH AIR POLLUTING PROCESSES

Application

Description

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

Accessories, Dimensions and weight, Product details

Installation details, Basic information and nomenclature

Downloads

product information

Product data sheet Actuators – Heating/Cooling

Product data sheet Actuators – Thermal actuators

Product data sheet Actuators – Modulating actuators

Product data sheet Type QSH

certificates

Environmental Product Declaration QSH

Non-CE Manufacturer's statement QSH

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE