QLW-AZ

Supply and extract air combination for installation into walls and bulkheads, one-way air discharge, for comfort zones

Displacement flow diffusers with supply and extract air functions combined in one casing

Nominal lengths 600 – 1200 mm
Volume flow rate range 12 – 45 l/s or 43 – 162 m³/h
Variant with cross-talk attenuator ensures very good transmission loss
Perforated plate, square pitch
Circular duct connections
Horizontal duct connection

Optional equipment and accessories

Exposed surface in RAL CLASSIC colours
Damper blade for volume flow rate balancing
Cross-talk attenuator
Fixing brackets

Application

Application

Type QLW-AZ displacement flow diffusers are supply and extract air combinations for use in comfort zones
Attractive design element for building owners and architects with demanding aesthetic requirements
For installation into walls or bulkheads, either individually or several diffusers arranged in a row
Low-velocity airflow, causing only low levels of induction and resulting in low-turbulence displacement ventilation.
Excellent air quality in the occupied zone
For variable and constant volume flows
For supply air to room air temperature differences from –6 to –1 K

Special characteristics

One-way air discharge
Diffuser face screw-fixed to casing, hence easy to remove
Horizontal duct connection

Nominal sizes

L: 600, 750, 900, 1050, 1200 mm

Description

Variants

QLW-AZ-ZT: Displacement flow diffuser with cross-talk attenuator

Parts and characteristics

Casing
Removable diffuser face made of perforated sheet metal
Equalising element

Attachments

Damper blade for volume flow rate balancing

Accessories

Lip seal
Wall fixing bracket

Useful additions

Retrofit cross-talk attenuator

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180

Materials and surfaces

The casing of the displacement flow diffuser, and the cross-talk attenuator casing, diffuser face and equalising element are made of galvanised sheet steel
Lip seal made of rubber
Acoustic lining of the cross-talk attenuator is mineral wool
Exposed diffuser face powder-coated RAL 9010, pure white
P1: Powder-coated, RAL CLASSIC colour

Mineral wool

To EN 13501, fire rating class A1, non-combustible
RAL quality mark RAL-GZ 388
Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
Faced with glass fibre fabric as a protection against erosion through airflow velocities of up to 20 m/s
Inert to fungal and bacterial growth

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 QLW-AZ without cross-talk attenuator

① Diffuser face
② Casing
③ Separating panel
④ Extract air spigot
⑤ Supply air spigot
Optional
⑥ Lip seal
⑦ White cord for opening the damper blade
⑧ Green cord for closing the damper blade

Functional description

Displacement flow diffusers discharge the air from air conditioning systems with a low velocity and near the floor. The low-turbulence airflow moves along the wall and towards the floor, where it eventually covers the entire floor area. 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.

Displacement ventilation is characterised by low airflow velocities and low turbulence. The air quality in the occupied zone is very high.

Displacement ventilation with air discharge near the floor is suitable only for cooling. The maximum supply air to room air temperature difference is –6 K.

Type QLW-AZ displacement flow diffusers include an equalising element which distributes the supply air flow equally across the entire diffuser area. The perforated sheet metal diffuser face helps to equalise the airflow further. One-way air discharge.

The upper part of the diffuser face is used for extract air. This solution is ideal insofar as the extract air has to be removed above the occupied zone.

Nominal sizes	600, 750, 900, 1050, 1200 mm
Minimum volume flow rate, at approx. 0.2 m/s	12 – 25 l/s or 43 – 90 m³/h
Maximum volume flow rate, at approx. 0.4 m/s	25 – 45 l/s or 90 – 162 m³/h
Supply air to room air temperature difference	–6 to –1 K

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

QLW-AZ, sound power level and total differential pressure

Nominal size	V		v₀	Damper blade position
Nominal size	V		v₀	0°			45°			90°
Nominal size	V		v₀	Δp_t ①	Δp_t ②	L_WA	Δp_t ①	Δp_t ②	L_WA	Δp_t ①	Δp_t ②	L_WA
Nominal size	l/s	m³/h	m/s	Pa		dB(A)	Pa		dB(A)	Pa		dB(A)
600	12	43	0.18	7	<3	<15	9	3	<15	16	10	17
600	15	54	0.23	11	3	19	13	5	21	26	15	24
600	20	72	0.30	19	5	31	24	10	32	46	27	34
600	25	90	0.38	30	7	40	37	15	41	72	42	42
750	15	54	0.18	8	<3	16	10	6	19	24	16	21
750	20	72	0.24	14	4	26	18	10	29	42	28	31
750	25	90	0.30	21	6	34	28	16	37	65	43	39
750	30	108	0.36	31	9	41	41	24	43	94	63	45
900	20	72	0.20	11	4	24	16	9	27	38	28	29
900	25	90	0.25	17	6	31	25	15	35	59	44	36
900	30	108	0.30	24	9	37	36	21	41	85	63	43
900	35	126	0.35	33	12	42	49	29	46	116	86	48
1050	20	72	0.17	10	4	23	16	10	28	37	29	31
1050	25	90	0.22	15	6	30	25	15	36	58	45	38
1050	30	108	0.26	22	8	36	36	22	41	84	65	43
1050	40	144	0.35	39	15	45	64	39	51	149	116	52
1200	25	90	0.19	13	5	29	20	15	34	58	43	39
1200	30	108	0.23	19	8	35	29	22	40	84	61	44
1200	35	126	0.27	25	10	39	40	30	45	114	83	48
1200	45	162	0.34	42	17	46	66	49	52	189	138	55

① Supply air

② Extract air

QLW-AZ-ZT, sound power level and total differential pressure

Nominal size	V		v₀	Damper blade position
Nominal size	V		v₀	0°			45°			90°
Nominal size	V		v₀	Δp_t ①	Δp_t ②	L_WA	Δp_t ①	Δp_t ②	L_WA	Δp_t ①	Δp_t ②	L_WA
Nominal size	l/s	m³/h	m/s	Pa		dB(A)	Pa		dB(A)	Pa		dB(A)
600	7	25	0.11	5	3	<15	5	4	<15	7	6	<15
600	10	36	0.15	10	7	15	10	8	17	14	11	19
600	15	54	0.23	22	15	28	22	17	30	31	26	31
600	20	72	0.30	40	27	38	40	31	39	54	46	40
750	10	36	0.12	9	6	15	9	7	15	13	10	20
750	15	54	0.18	20	15	28	20	15	28	29	22	32
750	20	72	0.24	35	26	36	35	27	37	51	39	40
750	25	90	0.30	55	41	43	55	42	44	79	61	47
900	15	54	0.15	18	14	26	19	16	28	26	16	30
900	20	72	0.20	32	25	35	33	29	37	47	29	38
900	25	90	0.25	50	40	41	52	46	43	73	46	44
900	30	108	0.30	73	57	46	75	66	49	106	66	49
1050	20	72	0.17	32	25	35	33	31	38	47	46	40
1050	25	90	0.22	50	39	42	52	49	44	74	72	46
1050	30	108	0.26	73	56	47	74	70	50	106	103	51
1050	35	126	0.30	99	77	52	101	95	54	145	141	55
1200	25	90	0.19	50	37	42	51	46	43	76	68	45
1200	30	108	0.23	73	54	47	74	66	48	109	98	50
1200	35	126	0.27	99	73	51	101	90	53	149	134	55
1200	40	144	0.30	129	96	55	132	117	57	194	175	59

① Supply air

② Extract air

Displacement flow diffusers as supply and extract air combinations, suitable for comfort zones with special demands on architecture and design.

With one-way air discharge for low-turbulence displacement ventilation. For wall and bulkhead installation.

Ready-to-install component which consists of a casing with horizontal spigots, an equalising element, and a perforated sheet metal diffuser face.

Spigot suitable for ducts to EN 1506 or EN 13180.

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

Special characteristics

One-way air discharge
Diffuser face screw-fixed to casing, hence easy to remove
Horizontal duct connection

Materials and surfaces

The casing of the displacement flow diffuser, and the cross-talk attenuator casing, diffuser face and equalising element are made of galvanised sheet steel
Lip seal made of rubber
Acoustic lining of the cross-talk attenuator is mineral wool
Exposed diffuser face powder-coated RAL 9010, pure white
P1: Powder-coated, RAL CLASSIC colour

Mineral wool

To EN 13501, fire rating class A1, non-combustible
RAL quality mark RAL-GZ 388
Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
Faced with glass fibre fabric as a protection against erosion through airflow velocities of up to 20 m/s
Inert to fungal and bacterial growth

Technical data

Nominal sizes: 600, 750, 900, 1050, 1200 mm
Minimum volume flow rate, at approx. 0.2 m/s: 12 – 25 l/s or 43 – 90 m³/h
Maximum volume flow rate, at approx. 0.4 m/s: 25 – 45 l/s or 90 – 162 m³/h
Supply air to room air temperature difference: –6 to –1 K

Sizing data

V _______________________ [m³/h]
Δp_t _______________________ [Pa]

Air-regenerated noise

L_WA _______________________ [dB(A)]

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

Type
QLW-AZ Displacement flow diffuser

Cross-talk attenuator
No entry: none
ZT With cross-talk attenuator

Damper blade for volume flow rate balancing
No entry: none
M With

Lip seal
No entry: none
L With

Nominal size [mm]
600
750
900
1050
1200

Fixing
No entry: none
W00 With mounting bracket for wall mounting (supplied separately)

Exposed surface
       No entry: powder-coated
       RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Order example: QLW-AZ–ZT/750/P1-RAL 9016

Cross-talk attenuator	With
Damper blade for volume flow rate balancing	Without
Lip seal	Without
Nominal size	750 mm
Exposed surface	RAL 9016, traffic white, gloss level 70 %

Variants, Dimensions and weight

QLW-AZ

QLW-AZ

The nominal size (nominal width × nominal height) is equal to the discharge opening.

QLW-AZ

Nominal length mm L_N	QLW-AZ m kg	QLW-AZ-ZT m kg	B₁ mm	B₂ mm
600	5.5	7.5	640	600
750	6.5	9.5	790	750
900	7.5	11.0	940	900
1050	8.5	12.5	1090	1050
1200	10.0	14.0	1240	1200

Installation details, Basic information and nomenclature

Installation opening 00221147_0

Installation and commissioning

If necessary, carry out volume flow rate balancing with the damper blade

These are only schematic diagrams to illustrate installation details.

Principal dimensions

B₁ [mm]

Width of diffuser face

B₄ [mm]

Width of a rectangular spigot

ØD [mm]

Outer diameter of the spigot

ØD₁ [mm]

Casing diameter

H₁ [mm]

Height of diffuser face

T₁ [mm]

Casing depth

T₄ [mm]

Depth of a rectangular spigot

m [kg]

Weight

Nomenclature

L_WA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

v₀ [m/s]

Theoretical airflow velocity across the diffuser area, at a distance of 0 m from the diffuser face

L_nz [m]

Near zone of the displacement flow diffuser, where the comfort criteria may not be achieved

The near zone is at least 0.5 m, independent of the airflow velocity

At distance L_nz the airflow velocity is 0.2 m/s max., measured 0.1 m above the floor

Δt_z [K]

Supply air to room air temperature difference, i.e. supply air temperature minus room temperature

Δp_t [Pa]

Total differential pressure

A_eff [m²]

Effective air discharge area

All sound power levels are based on 1 pW.

Downloads

product information

Print page QLW-AZ
Product data sheet Type QLW-AZ

Product data sheet 1,6 MB pdf

certificates

Non-CE Manufacturer's statement QLW-AZ

QLW-AZ_NotCE_2022_02_08_14_36_34_DE_en Certificate 1,2 MB pdf

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QLW-AZ

Supply and extract air combination for installation into walls and bulkheads, one-way air discharge, for comfort zones

Application

Description

Technical information

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

Variants, Dimensions and weight

Installation details, Basic information and nomenclature

Downloads

product information

Print page QLW-AZ

Product data sheet Type QLW-AZ

certificates

Non-CE Manufacturer's statement QLW-AZ

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE