Type VSD35

VSD35-1-AK

Nominal length up to 1500 mm: one spigot

Installation in continuous ceilings

Concealed screw fixing

Alternating horizontal air discharge

Plenum box with damper blade (optional)

Configure now

Type VSD35

Numerous variants for many different installation situations

Slot diffusers with 35 mm diffuser face (nominal width) and adjustable air control elements

Nominal length from 600 to 1950 mm, 1 to 4 slots
Volume flow rate range 15 – 135 (l/s)/m or 54 – 486 (m³/h)/m
Diffuser face made of extruded aluminium sections
For variable and constant volume flows
Suitable for continuous linear arrangement
High induction results in a rapid reduction of the temperature difference and airflow velocity
Individually adjustable air control elements to meet individual local requirements

Optional equipment and accessories

Exposed diffuser face available in RAL CLASSIC colours
Diffuser face with extended border
Damper blade for volume flow rate balancing, can be adjusted through the diffuser face
Concealed screw fixing that simplifies installation of the diffuser after the ceiling has been completed
Symmetric and asymmetric plenum boxes, with or without lining
End plates, end angles, corner sections

Initialize order code

Application

Application

Type VSD35 slot diffusers are used as supply air or extract air devices in comfort zones
They blend in inconspicuously with continuous grid ceilings and plasterboard ceilings
Air discharge is one-way or alternating horizontal, or alternating angled; turbulent flow (mixed flow ventilation)
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
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

Special characteristics

Individually adjustable air control elements to meet individual local requirements
High induction results in a rapid reduction of the temperature difference and airflow velocity
Diffuser face has been optimised for maximum volume flow rate at low sound power levels
Suitable for continuous linear arrangement

Nominal sizes

L_N: 600, 750, 900, 1050, 1200, 1350, 1500, 1650, 1800, 1950 mm
Diffuser face available in intermediate sizes from 300 to 2400 mm, in increments of 1 mm

Description

Variants

VSD35-*: 1, 2, 3 or 4 slots
VSD35-*-F: Diffuser face only
VSD35-*-E: Corner section
VSD35-...: Diffuser face without extended border
VSD35-.../B00: Diffuser face with extended border
VSD35-...: Black air control elements
VSD35-.../WW: White air control elements

Plenum box and diffuser face fixing

AK: Plenum box and clamp fixing
DK: Plenum box with lining and clamp fixing
AS: Plenum box and concealed screw fixing
DS: Plenum box with lining and concealed screw fixing
AA: Asymmetric plenum box and clamp fixing

Parts and characteristics

Diffuser face with individually adjustable air control elements
Plenum box for horizontal duct connection
Concealed screw fixing (facilitates installation of the diffuser face) or clamp fixing
Connecting pins and alignment plates to connect and align slot diffusers for a continuous linear arrangement

Attachments

M: Damper blade for volume flow rate balancing
C1, C2: Two end plates
C5, C6: Two end angles

Accessories

Lip seal

Useful additions

EP: Two end plates
EW: Two end angles
To be ordered separately for continuous linear runs

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180
Spigot with groove for lip seal (if accessory lip seal has been ordered)

Materials and surfaces

Diffuser face made from extruded aluminium sections
Air control elements made of 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 rubber
Lining is mineral wool
Diffuser face with anodised finish, E6-C-0, natural colour
P1: Powder-coated, RAL CLASSIC colour
Air control elements similar to RAL 9005, black
WW: Air control elements similar to RAL 9010, white

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 abrasion 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 the VSD35 with clamp fixing

① Diffuser face
② Adjustable air control element
③ Neck
④ Plenum box
⑤ Suspension lug
⑥ Spigot
Optional
⑦ Lip seal
⑧ Damper blade for volume flow rate balancing
⑨ Clamp fixing

Functional description

Slot diffusers direct the air from air conditioning systems into the room, either horizontally or at an angle. 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 VSD35 slot diffusers have adjustable air control elements. The air pattern can be adjusted to meet different local requirements. Air discharge is one-way or alternating horizontal. Heating mode with angled air discharge is also possible. 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 VSD35 diffusers may also be used for extract air.

Nominal length	600, 750, 900, 1050, 1200, 1350, 1500, 1650, 1800, 1950 mm
Number of slots	1, 2, 3, 4
Neck extension	0, 30, 55, 80, 104, 105, 129 mm
Minimum volume flow rate	15 – 50 (l/s)/m or 54 – 180 (m³/h)/m
Maximum volume flow rate, with L_WA≅ 50 dB(A)	45 – 135 (l/s)/m or 162 – 486 (m³/h)/m
Supply air to room air temperature difference	–10 to +10 K

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. 50 dB (A) with damper blade position 0°.

Exact values for all parameters can be determined with our Easy Product Finder design programme.

Sizing example

Given data

V = 60 l/s (216 m³/h)

Slot diffuser for ceiling installation

Maximum sound power level 40 dB(A) with damper blade position 45°

Alternating angled air discharge

Quick sizing

Type VSD35

Nominal sizes: VSD35-1/1950×123, VSD35-2/1200×138, VSD35-1/1500×123, VSD35-3/600×158, VSD35-3/750×138

Selected: VSD35-2/1200×138

VSD35-1, supply air, alternating horizontal air discharge, sound power level and total differential pressure

Nominal length	V		Damper blade position
Nominal length	V		0°				45°				90°
Nominal length	V		D = 98		D = 123		D = 98		D = 123		D = 98		D = 123
Nominal length	V		Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA
Nominal length	l/s	m³/h	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)
600	7	25	4	<15	4	<15	5	<15	4	<15	8	<15	5	<15
600	15	54	17	27	15	22	23	27	18	23	35	27	23	23
600	20	72	30	35	27	31	41	35	31	31	62	36	40	32
600	30	108	66	47	60	44	91	48	70	44	139	49	90	44
750	10	36	5	<15	5	<15	8	<15	6	<15	14	<15	8	<15
750	20	72	21	31	18	27	32	32	22	27	53	32	31	28
750	25	90	32	38	28	34	49	38	35	34	83	39	48	34
750	35	126	63	48	55	44	96	49	68	44	162	50	94	45
900	11	40	5	<15	4	<15	9	<15	6	<15	15	<15	8	<15
900	20	72	16	28	13	24	27	29	18	24	48	30	26	25
900	30	108	35	40	29	36	60	41	39	36	108	42	59	37
900	40	144	63	49	52	45	106	50	69	45	192	51	104	46
1050	15	54	7	19	6	<15	14	19	8	15	26	19	13	15
1050	25	90	20	32	16	28	37	33	23	28	71	34	36	29
1050	30	108	29	37	23	33	53	38	33	34	101	39	52	34
1050	45	162	65	50	51	45	120	51	73	46	228	52	116	47
1200	15	54	6	17	5	<15	13	17	7	<15	25	18	12	<15
1200	30	108	25	35	18	31	49	36	28	31	97	37	48	32
1200	40	144	43	44	33	39	87	45	50	40	172	46	84	41
1200	50	180	68	50	51	46	136	52	78	47	269	53	132	48
1350	20	72	10	23	7	18	21	23	11	19	42	24	20	19
1350	30	108	22	33	16	29	46	34	25	30	94	35	45	30
1350	40	144	38	42	27	37	82	43	45	38	167	44	79	39
1350	50	180	60	48	42	44	128	50	70	45	261	51	124	46
1500	20	72	9	21	6	<15	20	22	11	17	41	22	19	18
1500	30	108	20	32	13	27	44	33	23	28	92	34	43	29
1500	40	144	35	40	24	36	78	41	41	36	163	43	76	37
1500	55	198	65	49	44	45	148	51	78	46	309	53	143	47
1650	20	72	5	17	4	<15	8	17	6	<15	14	17	8	<15
1650	45	162	25	38	21	34	40	39	27	35	70	40	39	35
1650	50	180	31	41	26	37	50	42	34	38	86	43	48	38
1650	70	252	60	52	51	48	97	53	66	48	169	54	95	49
1800	25	90	7	21	6	17	12	21	8	17	21	22	11	18
1800	40	144	18	33	15	29	30	34	19	30	53	35	29	30
1800	60	216	39	45	32	41	66	46	43	42	119	47	64	42
1800	70	252	53	50	44	46	90	51	59	46	162	52	88	47
1950	25	90	6	20	5	16	11	20	7	16	20	21	11	17
1950	40	144	16	32	13	28	28	33	18	28	51	34	27	29
1950	50	180	24	39	20	34	43	39	27	35	80	40	42	36
1950	70	252	47	49	38	44	84	50	53	45	156	51	82	46

VSD35-2, supply air, alternating horizontal air discharge, sound power level and total differential pressure

Nominal length	V		Damper blade position
Nominal length	V		0°				45°				90°
Nominal length	V		D = 123		D = 138		D = 123		D = 138		D = 123		D = 138
Nominal length	V		Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA
Nominal length	l/s	m³/h	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)
600	15	54	5	<15	4	<15	7	<15	6	<15	12	<15	9	<15
600	30	108	18	31	17	29	28	31	23	29	48	32	35	30
600	33	120	23	34	21	32	35	35	29	32	59	35	44	33
600	55	198	61	49	56	47	94	50	77	48	159	51	118	49
750	20	72	6	17	5	15	11	17	8	15	19	18	14	16
750	35	126	18	32	16	30	32	32	25	30	58	33	41	31
750	50	180	37	42	32	40	64	43	50	41	118	44	84	42
750	65	234	62	50	55	48	108	51	84	49	199	53	141	50
900	25	90	8	20	6	18	14	21	11	18	28	21	19	19
900	40	144	19	33	16	30	36	33	27	31	71	34	49	32
900	55	198	35	42	30	40	68	43	51	40	133	44	92	42
900	70	252	57	49	48	47	111	50	82	48	216	52	149	49
1050	25	90	6	18	5	16	13	19	10	17	27	19	18	17
1050	45	162	20	34	16	31	42	35	31	32	86	36	58	33
1050	60	216	35	42	29	40	75	43	54	41	152	44	103	42
1050	75	270	55	49	45	46	117	50	84	47	237	52	160	49
1200	30	108	8	21	6	19	18	22	13	19	37	22	25	20
1200	50	180	22	35	17	32	49	36	35	33	103	37	69	34
1200	70	252	42	44	34	42	96	46	68	43	201	47	134	44
1200	85	306	62	50	49	48	141	52	100	49	296	54	197	51
1350	35	126	10	23	8	21	23	24	16	22	50	25	33	22
1350	55	198	24	36	18	33	57	37	39	34	122	38	80	35
1350	75	270	44	44	34	42	105	46	73	43	226	48	149	45
1350	90	324	62	50	49	48	152	52	105	49	326	54	215	51
1500	35	126	9	22	7	20	23	23	15	20	49	23	32	21
1500	55	198	22	34	17	32	55	35	38	33	120	37	79	34
1500	75	270	40	43	31	40	102	44	70	42	223	46	146	43
1500	95	342	64	50	49	47	164	52	112	49	357	54	234	51
1650	40	144	6	21	5	19	11	21	8	19	20	21	14	19
1650	65	234	15	33	13	31	28	34	21	32	53	35	37	33
1650	90	324	29	43	25	41	53	44	41	41	101	45	71	42
1650	115	414	47	50	41	48	87	51	66	49	165	53	115	50
1800	45	162	7	22	6	20	13	23	10	21	25	24	17	21
1800	70	252	16	34	14	32	31	35	23	33	60	36	41	34
1800	95	342	29	43	25	41	56	44	42	42	110	45	76	43
1800	120	432	46	50	39	48	89	51	67	49	175	53	120	50
1950	45	162	6	21	5	19	12	22	9	20	24	22	17	20
1950	70	252	15	33	12	31	29	34	22	32	58	35	40	32
1950	95	342	26	42	22	39	54	43	39	40	107	44	73	41
1950	125	450	45	50	38	48	93	51	68	49	185	53	126	50

VSD35-3, supply air, alternating horizontal air discharge, sound power level and total differential pressure

Nominal length	V		Damper blade position
Nominal length	V		0°				45°				90°
Nominal length	V		D = 138		D = 158		D = 138		D = 158		D = 138		D = 158
Nominal length	V		Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA
Nominal length	l/s	m³/h	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)
600	25	90	6	18	6	16	11	18	8	16	19	19	13	16
600	40	144	16	30	14	28	27	31	21	28	49	32	33	29
600	60	216	36	42	31	40	61	43	46	40	109	44	74	41
600	75	270	55	49	49	47	95	50	71	47	171	51	116	48
750	30	108	7	20	6	17	13	20	9	18	25	21	17	18
750	50	180	19	33	16	31	36	34	26	31	70	35	45	32
750	70	252	36	43	30	40	70	44	50	41	137	46	89	42
750	85	306	53	49	44	46	103	50	74	47	201	52	131	49
900	35	126	8	21	6	19	16	22	11	19	33	22	21	20
900	55	198	18	33	15	31	39	34	27	31	80	35	51	32
900	75	270	34	42	27	39	73	43	50	40	149	45	94	42
900	95	342	54	49	43	47	117	51	80	48	239	52	151	49
1050	35	126	7	19	5	16	15	20	10	17	32	20	20	18
1050	55	198	16	31	12	28	37	32	24	29	78	33	48	30
1050	80	288	33	42	26	39	78	43	51	40	165	44	102	41
1050	105	378	57	50	44	47	134	51	88	48	283	53	175	50
1200	45	162	10	24	7	21	24	25	15	22	51	25	31	22
1200	70	252	23	36	17	33	57	37	37	34	123	38	76	35
1200	95	342	42	44	31	42	105	46	68	43	227	48	139	44
1200	115	414	62	50	46	47	153	52	99	49	333	54	203	51
1350	50	180	11	25	8	22	28	26	18	23	62	27	38	24
1350	75	270	24	36	18	33	63	37	40	34	140	39	85	35
1350	100	360	43	44	31	41	112	46	71	43	248	48	150	44
1350	120	432	62	50	44	47	162	52	103	48	357	54	216	50
1500	55	198	12	26	9	23	33	27	21	24	74	28	45	25
1500	80	288	26	36	18	33	70	38	44	35	157	39	95	36
1500	105	378	45	44	31	41	121	46	76	43	271	48	163	44
1500	130	468	68	50	48	47	185	52	116	49	415	55	249	51
1650	60	216	7	23	6	21	14	24	10	22	27	25	17	22
1650	90	324	15	34	12	32	30	35	21	32	61	36	39	33
1650	120	432	26	42	22	40	54	44	38	41	108	45	69	42
1650	155	558	44	50	36	47	90	51	62	49	179	53	114	50
1800	65	234	7	24	6	22	15	25	11	22	31	26	20	23
1800	100	360	17	36	13	33	36	37	25	34	73	38	46	35
1800	130	468	28	43	22	41	60	45	41	42	123	46	78	43
1800	165	594	45	50	36	48	97	52	66	49	199	54	125	51
1950	70	252	8	25	6	23	17	26	12	23	35	27	22	24
1950	100	360	16	35	12	32	35	36	23	33	72	37	45	34
1950	135	486	28	43	22	41	63	44	42	42	131	46	82	43
1950	170	612	44	50	35	47	99	52	67	49	207	54	129	50

VSD35-4, supply air, alternating horizontal air discharge, sound power level and total differential pressure

Nominal length	V		Damper blade position
Nominal length	V		0°				45°				90°
Nominal length	V		D = 158		D = 198		D = 158		D = 198		D = 158		D = 198
Nominal length	V		Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA	Δp_t	L_WA
Nominal length	l/s	m³/h	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)	Pa	dB(A)
600	30	108	5	17	4	<15	9	17	6	<15	16	17	9	<15
600	55	198	17	32	14	28	29	33	19	29	53	34	29	29
600	75	270	32	41	26	37	54	42	35	38	99	43	53	39
600	100	360	56	50	46	46	96	51	62	47	175	53	94	48
750	40	144	7	21	5	17	13	21	8	17	26	22	13	17
750	65	234	18	34	14	29	35	34	21	30	68	36	34	31
750	90	324	34	43	26	39	67	44	39	40	131	46	65	40
750	110	396	51	49	39	45	100	51	58	46	195	52	97	47
900	45	162	7	21	5	17	15	22	9	18	31	22	15	18
900	70	252	17	33	12	29	37	34	20	29	76	35	36	30
900	100	360	35	43	24	39	75	45	41	40	154	46	73	41
900	125	450	54	50	38	46	117	52	64	47	240	53	114	48
1050	50	180	8	22	5	18	18	22	9	18	38	23	17	19
1050	75	270	17	33	11	28	40	34	21	29	84	35	39	30
1050	105	378	33	42	22	38	78	44	40	39	164	45	75	40
1050	135	486	54	50	36	45	128	51	66	46	272	54	124	48
1200	55	198	8	23	5	19	21	23	10	19	44	24	20	19
1200	85	306	20	34	12	30	49	35	24	30	106	37	47	31
1200	115	414	36	43	22	38	89	44	44	39	193	46	86	41
1200	145	522	56	50	35	45	141	52	70	46	307	54	137	48
1350	65	234	11	25	6	21	28	26	13	22	61	27	27	22
1350	95	342	23	36	13	31	59	37	28	32	130	38	57	33
1350	125	450	39	43	23	39	102	45	49	40	225	47	99	41
1350	155	558	59	50	35	45	156	52	75	47	346	54	151	48
1500	70	252	12	26	7	22	31	27	15	22	70	28	30	23
1500	100	360	23	36	13	31	64	37	30	32	143	39	62	33
1500	135	486	43	44	24	39	116	46	54	41	260	48	112	42
1500	165	594	63	50	36	45	173	52	81	47	388	55	168	49
1650	80	288	7	25	5	21	14	25	8	21	28	26	14	22
1650	120	432	15	35	11	31	31	36	18	32	62	37	30	33
1650	160	576	27	44	20	39	55	45	31	40	111	46	54	41
1650	200	720	42	50	30	46	86	52	49	47	173	54	84	48
1800	85	306	7	25	5	21	15	26	8	22	31	26	15	22
1800	125	450	15	35	11	31	32	36	18	32	66	37	32	33
1800	170	612	28	44	18	39	60	45	31	40	122	47	55	41
1800	210	756	42	50	30	46	91	52	49	47	186	54	88	48
1950	90	324	7	25	5	22	16	26	9	22	34	27	16	23
1950	133	480	16	36	11	32	36	37	19	32	74	38	35	33
1950	177	636	28	44	19	39	62	45	33	40	130	47	60	42
1950	220	792	42	50	29	46	96	52	51	47	201	54	93	49

Slot diffusers with individually manually adjustable air control elements and an aesthetically shaped face section with one to four slots, for one-way horizontal, alternating horizontal or alternating angled air discharge. For supply air or extract air. For installation into suspended ceilings.

Ready-to-install component which consists of the diffuser face with individually adjustable black or white air control elements, and of a plenum box with side entry spigot and suspension lugs.

Clamp fixing or concealed screw fixing

Spigot suitable for circular ducts to EN 1506 or EN 13180.

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

Special characteristics

Individually adjustable air control elements to meet individual local requirements
High induction results in a rapid reduction of the temperature difference and airflow velocity
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 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 rubber
Lining is mineral wool
Diffuser face with anodised finish, E6-C-0, natural colour
P1: Powder-coated, RAL CLASSIC colour
Air control elements similar to RAL 9005, black
WW: Air control elements similar to RAL 9010, white

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 abrasion through airflow velocities of up to 20 m/s
Inert to fungal and bacterial growth

Technical data

Nominal length: 600 – 1950 mm
Number of slots: 1, 2, 3, 4
Neck extension: 0, 30, 55, 80, 104, 105, 129 mm
Minimum volume flow rate: 15 – 50 (l/s)/m or 54 – 180 (m³/h)/m
Maximum volume flow rate with L_WA ≅ 50 dB(A): 45 – 135 (l/s)/m or 162 – 486 (m³/h)/m
Supply air to room air temperature difference: –10 to +10 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
VSD35 Slot diffuser

Number of slots
1
2
3
4

Connection
F       Diffuser face only
E       90° corner section only
       Plenum box
AK       With clamp fixing
DK       With lining and clamp fixing
AS       With concealed screw fixing
DS       With lining and concealed screw fixing
AA       Asymmetric and with clamp fixing
Diffusers with a shorter plenum box as well as non-active diffusers require a rear blanking plate

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

Accessories
No entry: none
L With lip seal

Nominal size [mm]
Nominal length L_N
600
750
900
1050
1200
1350
1500
1650
1800
1950

       Specify ØD and Y only for AK, DK, AS, DS and AA
       Up to L_N 1500 with one spigot, from L_N 1650 with two spigots
       spigot diameter ØD
98       1 slot
123       1 or 2 slots
138       2 or 3 slots
158       3 or 4 slots
198       4 slots

Neck extension Y
No entry: 0
30
55
80
105
129
(129 only AK, DK and AA)

End pieces
       No entry: without
       Both ends with end angles factory fitted
C1       to profile 000
C2       to profile B00
       Both ends with end plates factory fitted
C5       to profile 000
C6       to profile B00
       To be ordered separately for slot diffusers for linear arrangement

Extended border
No entry: without (only AK, DK, AA)
B00 With extended border

Exposed surface
No entry: anodised, E6-C-0, natural colour
P1 Powder-coated, specify RAL CLASSIC colour

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

Air pattern
       No entry: alternating horizontal (WH)
WS       Alternating angled
HL       Horizontal left (opposite direction from spigot)
HR       Horizontal right (same direction as spigot)

Colour of air control elements
No entry: similar to RAL 9005, black
WW Similar to RAL 9010, white

Order example: VSD35-2-AK-M-L/1200×123/C2/B00/P1–RAL 9010

Number of slots	2
Connection	Plenum box with clamp fixing
Damper blade for volume flow rate balancing	With
Accessories	Lip seal
Nominal size / spigot diameter	1200 × 123 mm
Neck extension	Without
End pieces	End angle
Extended border	With
Exposed surface	RAL 9010, pure white, gloss level 50 %
Air pattern	Alternating horizontal
Colour of air control elements	Black

Variants, Attachments, Dimensions and weight, Product details

VSD35-1

Diffuser face without extended border, black air control elements

VSD35-*-AS

Variant

Slot diffuser with plenum box for concealed screw fixing
Concealed screw fixing only with profile B00 (with extended border)

Parts and characteristics

Plenum box for horizontal duct connection
Concealed screw fixing
Damper blade (optional)
Lip seal (optional)

VSD35-*-DS

Variant

Slot diffuser with plenum box for concealed screw fixing
Plenum box with lining
Concealed screw fixing only with profile B00 (with extended border)

Parts and characteristics

Plenum box for horizontal duct connection
Concealed screw fixing
Thermal and acoustic insulation (lining)
Damper blade (optional)
Lip seal (optional)

VSD35-*-AK

Variant

Slot diffuser with plenum box for clamp fixing

Parts and characteristics

Plenum box for horizontal duct connection
Damper blade (optional)
Lip seal (optional)

VSD35-*-DK

Variant

Slot diffuser with plenum box for clamp fixing
Plenum box with lining

Parts and characteristics

Plenum box for horizontal duct connection
Concealed screw fixing
Thermal and acoustic insulation (lining)
Damper blade (optional)
Lip seal (optional)

VSD35-*-AA

Variant

Slot diffuser with plenum box for clamp fixing
Asymmetric plenum box

Parts and characteristics

Plenum box for horizontal duct connection
Asymmetric plenum box
Damper blade (optional)
Lip seal (optional)

End angles on both ends

VSD35VSD35

Nominal length mm L_N	L₁ mm
600	600
750	750
900	900
1050	1050
1200	1200
1350	1350
1500	1500
1650	1650
1800	1800
1950	1950

Variant	000 P mm	B00 P mm
VSD35-1	35	55
VSD35-2	62	82
VSD35-3	89	109
VSD35-4	116	136

Diffuser face VSD...-*-F

VSD35VSD35-*-ASVSD35-*-DSVSD35-*-AK, VSD35-*-AAVSD35-*-DKVSD35-*-ASVSD35-*-DSVSD35-*-AK, VSD35-*-AAVSD35-*-DK

Y: Neck extension, resulting neck lengths 76, 106, 131, 156, 180 mm

Y: Neck extension, resulting neck lengths 51, 81, 106, 131, 156, 180 mm

Nominal length mm L_N	L₁ mm	L₃ mm
600	600	595
750	750	745
900	900	895
1050	1050	1045
1200	1200	1195
1350	1350	1345
1500	1500	1495
1650	1650	1645
1800	1800	1795
1950	1950	1945

Variant	Y = 0 H₃ mm	Y = 0 A mm	Y = 30 H₃ mm	Y = 30 A mm	Y = 55 H₃ mm	Y = 55 A mm	Y = 80 H₃ mm	Y = 80 A mm	Y = 104 H₃ mm	Y = 104 A mm	B₃ mm	H₄ mm	ØD mm	C mm
VSD35-1/... × 98	228	153	258	183	283	208	308	233	332	257	100	152	98	48
VSD35-1/... × 123	228	153	258	183	283	208	308	233	332	257	100	152	123	46
VSD35-2/... × 123	258	168	288	198	313	223	338	248	362	272	138	182	123	46
VSD35-2/... × 138	258	168	288	198	313	223	338	248	362	272	138	182	138	40
VSD35-3/... × 138	276	177	306	207	331	232	356	257	380	281	176	200	138	40
VSD35-3/... × 158	276	177	306	207	331	232	356	257	380	281	176	200	158	48
VSD35-4/... × 158	308	193	338	223	363	248	388	273	412	297	214	232	158	48
VSD35-4/... × 198	308	193	338	223	363	248	388	273	412	297	214	232	198	48

Variant	Y = 0 H₃ mm	Y = 0 A mm	Y = 30 H₃ mm	Y = 30 A mm	Y = 55 H₃ mm	Y = 55 A mm	Y = 80 H₃ mm	Y = 80 A mm	Y = 104 H₃ mm	Y = 104 A mm	B₃ mm	H₄ mm	ØD mm	C mm
VSD35-1/... × 98	248	153	278	183	303	208	328	233	352	257	138	172	98	48
VSD35-1/... × 123	248	153	278	183	303	208	328	233	352	257	138	172	123	46
VSD35-2/... × 123	278	168	308	198	333	223	358	248	382	272	176	202	123	46
VSD35-2/... × 138	278	168	308	198	333	223	358	248	382	272	176	202	138	40
VSD35-3/... × 138	296	177	326	207	351	232	376	257	400	281	214	220	138	40
VSD35-3/... × 158	296	177	326	207	351	232	376	257	400	281	214	220	158	48
VSD35-4/... × 158	328	193	358	223	383	248	408	273	432	297	254	252	158	48
VSD35-4/... × 198	328	193	358	223	383	248	408	273	432	297	254	252	198	48

Variant	Y = 0 H₃ mm	Y = 0 A mm	Y = 30 H₃ mm	Y = 30 A mm	Y = 55 H₃ mm	Y = 55 A mm	Y = 80 H₃ mm	Y = 80 A mm	Y = 105 H₃ mm	Y = 105 A mm	Y = 129 H₃ mm	Y = 129 A mm	B₃ mm	H₄ mm	ØD mm	C mm
VSD35-1/... × 98	203	127	233	157	258	182	283	207	308	232	332	256	100	152	98	48
VSD35-1/... × 123	203	127	233	157	258	182	283	207	308	232	332	256	100	152	123	46
VSD35-2/... × 123	233	143	263	173	288	198	313	223	338	248	362	272	138	182	123	46
VSD35-2/... × 138	233	143	263	173	288	198	313	223	338	248	362	272	138	182	138	40
VSD35-3/... × 138	251	152	281	182	306	207	331	232	356	257	380	281	176	200	138	40
VSD35-3/... × 158	251	152	281	182	306	207	331	232	356	257	380	281	176	200	158	48
VSD35-4/... × 158	283	168	313	198	338	223	363	248	388	273	412	297	214	232	158	48
VSD35-4/... × 198	283	168	313	198	338	223	363	248	388	273	412	297	214	232	198	48

Variant	Y = 0 H₃ mm	Y = 0 A mm	Y = 30 H₃ mm	Y = 30 A mm	Y = 55 H₃ mm	Y = 55 A mm	Y = 80 H₃ mm	Y = 80 A mm	Y = 105 H₃ mm	Y = 105 A mm	Y = 129 H₃ mm	Y = 129 A mm	B₃ mm	H₄ mm	ØD mm	C mm
VSD35-1/... × 98	223	127	253	157	278	182	303	207	328	232	352	256	138	172	98	48
VSD35-1/... × 123	223	127	253	157	278	182	303	207	328	232	352	256	138	172	123	46
VSD35-2/... × 123	253	143	283	173	308	198	333	223	358	248	382	272	176	202	123	46
VSD35-2/... × 138	253	143	283	173	308	198	333	223	358	248	382	272	176	202	138	40
VSD35-3/... × 138	271	152	301	182	326	207	351	232	376	257	400	281	214	220	138	40
VSD35-3/... × 158	271	152	301	182	326	207	351	232	376	257	400	281	214	220	158	48
VSD35-4/... × 158	303	168	333	198	358	223	383	248	408	273	432	297	254	252	158	48
VSD35-4/... × 198	303	168	333	198	358	223	383	248	408	273	432	297	254	252	198	48

Nominal length mm L_N	VSD35-1 m kg	VSD35-2 m kg	VSD35-3 m kg	VSD35-4 m kg
600	3.0	3.7	4.3	5.1
750	3.7	4.5	5.3	6.3
900	4.4	5.4	6.3	7.4
1050	5.1	6.2	7.3	8.5
1200	5.8	7.1	8.2	9.6
1350	6.5	7.9	9.2	10.7
1500	7.2	8.8	10.2	11.9
1650	7.9	9.6	11.1	13.0
1800	8.6	10.5	12.1	14.1
1950	9.3	11.3	13.1	15.2

Nominal length mm L_N	VSD35-1 m kg	VSD35-2 m kg	VSD35-3 m kg	VSD35-4 m kg
600	3.8	4.6	5.4	6.2
750	4.7	5.7	6.6	7.6
900	5.6	6.7	7.8	9.0
1050	6.4	7.8	8.9	10.3
1200	7.3	8.8	10.1	11.7
1350	8.2	9.9	11.3	13.1
1500	9.1	10.9	12.5	14.4
1650	10.0	11.9	13.7	15.8
1800	10.8	13.0	14.9	17.2
1950	11.7	14.0	16.1	18.5

Nominal length mm L_N	VSD35-1 m kg	VSD35-2 m kg	VSD35-3 m kg	VSD35-4 m kg
600	2.2	2.9	3.6	4.3
750	2.7	3.6	4.4	5.3
900	3.3	4.3	5.1	6.2
1050	3.8	4.9	5.9	7.2
1200	4.3	5.6	6.7	8.1
1350	4.8	6.3	7.5	9.0
1500	5.3	6.9	8.3	10.0
1650	5.8	7.6	9.1	10.9
1800	6.4	8.2	9.9	11.9
1950	6.9	8.9	10.7	12.8

Nominal length mm L_N	VSD35-1 m kg	VSD35-2 m kg	VSD35-3 m kg	VSD35-4 m kg
600	3.1	3.9	4.6	5.5
750	3.8	4.7	5.6	6.6
900	4.4	5.6	6.6	7.8
1050	5.1	6.5	7.6	9.0
1200	5.8	7.3	8.6	10.2
1350	6.5	8.2	9.6	11.4
1500	7.2	9.0	10.7	12.5
1650	7.9	9.9	11.7	13.7
1800	8.6	10.8	12.7	14.9
1950	9.3	11.6	13.7	16.1

Variant	000 P mm	000 E mm	B00 P mm	B00 E mm
VSD35-1	35	110	55	100
VSD35-2	62	110	82	100
VSD35-3	89	110	109	100
VSD35-4	116	110	136	100

Number of spigots and spigot diameter

Nominal length	VSD35-1		VSD35-2		VSD35-3		VSD35-4
Nominal length	ØD
Nominal length	mm
600 – 1500	1 × 98	1 × 123	1 × 123	1 × 138	1 × 138	1 × 158	1 × 158	1 × 198
1650 – 1950	2 × 98	2 × 123	2 × 123	2 × 138	2 × 138	2 × 158	2 × 158	2 × 198

VSD35-1/.../000

VSD35VSD35

Profiles

A_eff: One-way horizontal and alternating horizontal air discharge

A_eff WS: Alternating angled air discharge

Variant	000 P mm	B00 P mm
VSD35-1	35	55
VSD35-2	62	82
VSD35-3	89	109
VSD35-4	116	136

Nominal length mm L_N	VSD35-1 A_eff m²	VSD35-1 A_eff WS m²	VSD35-2 A_eff m²	VSD35-2 A_eff WS m²	VSD35-3 A_eff m²	VSD35-3 A_eff WS m²	VSD35-4 A_eff m²	VSD35-4 A_eff WS m²
600	0.0035	0.0039	0.0070	0.0078	0.0105	0.0117	0.0140	0.0156
750	0.0044	0.0049	0.0088	0.0097	0.0131	0.0146	0.0175	0.0194
900	0.0053	0.0058	0.0105	0.0117	0.0158	0.0175	0.0210	0.0233
1050	0.0061	0.0068	0.0123	0.0136	0.0184	0.0204	0.0245	0.0272
1200	0.0070	0.0078	0.0140	0.0156	0.0210	0.0233	0.0280	0.0311
1350	0.0079	0.0088	0.0158	0.0175	0.0237	0.0262	0.0315	0.0350
1500	0.0088	0.0097	0.0175	0.0194	0.0263	0.0292	0.0350	0.0389
1650	0.0096	0.0107	0.0193	0.0214	0.0289	0.0321	0.0385	0.0428
1800	0.0105	0.0117	0.0210	0.0233	0.0315	0.0350	0.0421	0.0467
1950	0.0114	0.0126	0.0228	0.0253	0.0342	0.0379	0.0456	0.0505

Installation examples, Installation details, Commissioning, Basic information and nomenclature

VSD35-1/.../B00, installation in continuous ceilings

Anodised, E6-C-0, natural colour

Installation with plenum box

① Duct
② Suspension lug
③ Diffuser face

Horizontal duct connection
Four suspension lugs
Suspension with cords, wires or hangers, to be provided by others

Installation and commissioning

Preferably for rooms with a clear height up to 4.0 m
Flush ceiling installation
Horizontal duct connection
Diffusers with a shorter plenum box as well as non-active diffusers require a rear blanking plate; length of blanking plate = L₁ – L₃
For a continuous linear arrangement connect the diffusers with connecting pins and alignment plates
If necessary, carry out volume flow rate balancing with the damper blade

These are only schematic diagrams to illustrate installation details.

Volume flow rate balancing 00134438_0

Move the air control element near the spigot in such a way that it is possible to insert a screw driver

Volume flow rate balancing

When several diffusers are connected to just one volume flow controller, it may be necessary to balance the volume flow rates.

Slot diffusers with plenum box and damper blade (variant -M): The damper blade can be adjusted even after the diffuser face has been installed.

Principal dimensions

ØD [mm]

Outer diameter of the spigot

L₁ [mm]

Length of diffuser without end pieces

L₃ [mm]

Length of plenum box

P [mm]

Width of diffuser face – with extended border, if any

B₃ [mm]

Width of plenum box

H₃ [mm]

Height of slot diffuser with plenum box, from the lower edge of the suspended ceiling to the upper edge of the plenum box

Y [mm]

Neck extension – The neck length results from a fixed length plus the neck extension

A [mm]

Position of the spigot, defined by the distance of the spigot centre line to the lower edge of the suspended ceiling

C [mm]

Length of the spigot

m [kg]

Weight

Nomenclature

f_m [Hz]

Octave band centre frequency

L_WA [dB(A)]

Sound power level of the air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δp_t [Pa]

Total differential pressure

All sound power levels are based on 1 pW.

Downloads

product information

Product data sheet Type VSD35

Product data sheet 4,1 MB pdf

certificates

Declaration of hygiene conformity Type VSD35

Declaration of hygiene conformity 140 KB pdf

operation manuals

Installation manual Slot diffusers

A00000054449 Installation manual 1000 KB pdf

Type VSD35

Numerous variants for many different installation situations

Application

Description

Technical information

Function, TECHNICAL DATA, QUICK SIZING, SPECIFICATION TEXT, ORDER CODE

Variants, Attachments, Dimensions and weight, Product details

Installation examples, Installation details, Commissioning, Basic information and nomenclature

Downloads

product information

Product data sheet Type VSD35

certificates

Declaration of hygiene conformity Type VSD35

operation manuals

Installation manual Slot diffusers