Quietflow SQS

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SQS

8 sizes from 100mm to 500mm.
Air volume flow rates of up to 1.24 m³/s (AC) and 1.79 m³/s (EC).
Static pressures of up to 540 Pa (AC) and 920 Pa (EC).
Suitable for operating temperatures up to +60°C.
Robust galvanised sheet steel casing.

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The Quietflow SQS...EC incorporates the BAT (Best Available Technology) Vpro backward curved impeller, with three dimensional profiled blades powered by the ultra reliable Ziehl-Abegg EC (electronically commutated) external rotor motor. The range of acoustically treated single in-line fans are suitable for internal mounting, manufactured in galvanised steel with a natural finish.

FEATURES & BENEFITS

Learn more about individual features and benefits of our products.

SPECIFICATION

The Quietflow SQS range of centrifugal fans as manufactured by Elta Fans Ltd.

TECHNICAL INFORMATION

The technical information available to you from ELTA Fans is exhaustive - Choose from either sound, performance and electrical or dimensional data for each and every product

ACCESSORIES

Elta supply a full range of accessories for each of their products.

COMPARE

Choose up to three products to compare their features side-by-side.

DOWNLOADS

Get the full brochure, wiring diagrams and operation and maintenance instructions.

Features & Benefits

Design Appeal

Ideal for roof spaces and / or where space is at a premium.

Low Noise

Each unit is acoustically lined, therefore the breakout noise levels are low.

Ease of Installation

All models are designed for direct connection to standard diameter flexible or rigid circular ducting with 50 mm long spigots with EPDM rubber U shaped seals for ease of connection.

Performance

High efficiency low tonal noise backward curved centrifugal impellers are directly driven by an AC or EC external rotor motor, designed to be non overloading and provide high performance characteristics.

Easy Maintenance

Access to the fan and motor is by an easily removable panel for maintenance when required.

Material Strength

A robust, yet lightweight unit with a galvanised sheet steel casing treated internally with a Class O rated (BS 476 Parts 6 and 7) fire resistant acoustic foam lining with a fire resistant polymeric coating.

Reliability

Motor and Impeller manufactured by Ziehl-Abegg providing increased reliability.

Mounting

Each unit is supplied with integral mounting brackets.

Motor Protection

All SQS units have integral thermal overload protection which prevents the motor from overheating.

Tested To The Very Latest Standards

SQS units are tested to ISO 5801:1997 (airside performance) and to BS 848 Pt 2:1985 (sound performance) at Elta Fans own test facility, meaning accurate, up to date information on performance and noise data that can be relied upon.

Quality Assurance

All units are designed and manufactured with procedures as defined in BS EN ISO 9001: 2008.

Full Accessory Range

Speed controllers, fast clamps, anti-vibration mounts, electric heater batteries, silencers, panel filters, flexible connectors and non return dampers.

Specification

The Quietflow SQS range of in-line single fans as manufactured by Elta Fans Ltd. 46 Third Avenue, Pensnett Trading Estate, Kingswinford, West Midlands, DY6 7US, UK. Tel: +44 (0) 1384 275800 - If you need more information - Contact us.

Casing

The robust 1.2mm galvanised mild steel sheet casing, is treated internally with a Class O rated (BS 476 Parts 6 and 7) fire resistant acoustic foam lining with a fire resistant polymeric coating. The wrap around folded casing is specially manufactured using integral motor mounting plates to provide additional rigidity for the casings.

Each casing provides a suitably sized circular spigot to suit the duct size required. EPDM (Ethylene Propylene) rubber U shaped seals (being ozone and UV stable) are used to ensure a good seal back to the duct that is to be attached.

A removable lid is provided as a standard feature to facilitate ease of maintenance and cleaning.

Motors

The single range of units may have either an EC or AC single rotor motor fitted as standard. The motor contains sealed for life bearings. Thermal Class of motors to THCL 130 or 155 dependent on size

Manufactured by Ziehl-Abegg providing increased reliability

All motors are suitable for use in ambient air conditions up to +60°C.

Impellers

High efficiency low tonal noise backward curved centrifugal impeller, dynamically balanced to Grade 6.3 and directly driven by the motor to provide a smooth airflow through the unit.

Quality Management

All units in the Elta range are designed and manufactured to procedures as defined in BS EN ISO 9001:2008. They are also tested in accordance with BS848 Part 2 1985 (sound performance) and ISO 5801:2007 (airside performance).

Technical Information

Dimensional Data

Product Code	A	B	C	D	E	F	G	H	Weight kg
SQS100	509	350	261	100	390	485	375	587	13.4
SQS125	509	350	261	125	390	485	375	587	13.4
SQS150	509	350	261	150	390	485	375	587	13.4
SQS200	548	396	303	200	436	550	421	662	17
SQS250	548	396	333	250	436	550	421	702	18.6
SQS315	635	485	400	315	525	580	510	753	28
SQS400	700	570	472	400	670	580	620	858	39
SQS500	880	750	601	500	850	700	800	1038	60

All dimensions are expressed in mm.

Performance & Electrical

SINGLE Phase - 200V-277V / 50Hz / 60Hz

EC Motors

Product Code	Speed r/min	Airflow SFP	Airflow m³/s @ Static Pressure Pa.												Overall Efficiency%	FMEG	Motor Electrical Data
Product Code	Speed r/min	Airflow SFP	0	25	50	75	100	150	200	250	300	350	400	500	Overall Efficiency%	FMEG	FLC Amps	Input kW
SQS100-1ECL	3492	m³/s	0.112	0.11	0.107	0.105	0.103	0.098	0.093	0.088	0.081	0.075	0.067	0.046	30.2	N50	1.19	0.128
SQS100-1ECL	3492	W/(L/s)	1.13	1.15	1.18	1.2	1.23	1.28	1.34	1.41	1.49	1.58	1.7	2.1	30.2	N50	1.19	0.128
SQS125-1ECL	3428	m³/s	0.14	0.137	0.134	0.131	0.127	0.121	0.114	0.106	0.098	0.088	0.078	0.051	31.2	N51	1.23	0.133
SQS125-1ECL	3428	W/(L/s)	0.93	0.96	0.98	1	1.03	1.08	1.14	1.22	1.31	1.42	1.57	2.15	31.2	N51	1.23	0.133
SQS150-1ECL	3486	m³/s	0.166	0.161	0.157	0.153	0.149	0.14	0.132	0.124	0.116	0.107	0.097	0.073	37.7	N57	1.21	0.141
SQS150-1ECL	3486	W/(L/s)	0.85	0.87	0.89	0.91	0.93	0.98	1.03	1.08	1.14	1.21	1.3	1.59	37.7	N57	1.21	0.141
SQS200-1ECL	3404	m³/s	0.31	0.3	0.29	0.28	0.28	0.26	0.25	0.23	0.22	0.2	0.18	0.15	37.7	N54	2.08	0.239
SQS200-1ECL	3404	W/(L/s)	0.71	0.73	0.76	0.78	0.81	0.87	0.93	1.01	1.08	1.17	1.28	1.55	37.7	N54	2.08	0.239
SQS250-1ECL	2330	m³/s	0.34	0.33	0.31	0.3	0.28	0.26	0.23	0.2	0.17	0.15	0.13	0.1	32.8	N51	1.87	0.224
SQS250-1ECL	2330	W/(L/s)	0.54	0.57	0.59	0.61	0.64	0.7	0.79	0.91	1.07	1.26	1.49	2.02	32.8	N51	1.87	0.224
SQS315 -1ECL	2013	m³/s	0.62	0.61	0.6	0.58	0.57	0.53	0.5	0.46	0.41	0.36	0.3	0.15	35.4	N50	2.07	0.445
SQS315 -1ECL	2013	W/(L/s)	0.67	0.7	0.72	0.74	0.77	0.82	0.89	0.96	1.04	1.15	1.29	1.97	35.4	N50	2.07	0.445
SQS400-1ECL	2200	m³/s	1.05	1.04	1.03	1.02	1.01	0.98	0.96	0.93	0.9	0.87	0.83	0.72	44.3	N55	4.39	0.954
SQS400-1ECL	2200	W/(L/s)	0.76	0.77	0.79	0.8	0.82	0.86	0.89	0.94	0.98	1.04	1.1	1.28	44.3	N55	4.39	0.954
SQS500-1ECL	1422	m³/s	1.42	1.39	1.37	1.34	1.31	1.26	1.19	1.12	1.05	0.96	0.86	0.59	50.9	N62	3.51	0.774
SQS500-1ECL	1422	W/(L/s)	0.46	0.48	0.5	0.52	0.53	0.57	0.62	0.67	0.73	0.8	0.89	1.19	50.9	N62	3.51	0.774

Overall total efficiency, r/min and FMEG values are per ISO 12759 installation category D. FLC @ 230V / 50Hz. A variable speed drive is integrated within the fan.

THREE Phase - 380V-480V / 50Hz / 60Hz

EC Motors

Product Code	Speed r/min	Airflow SFP	Airflow m³/s @ Static Pressure Pa.												Overall Efficiency%	FMEG	Motor Electrical Data
Product Code	Speed r/min	Airflow SFP	0	25	50	75	100	150	200	250	300	350	400	500	Overall Efficiency%	FMEG	FLC Amps	Input kW
SQS500-3ECL	1799	m³/s	1.79	1.77	1.75	1.73	1.71	1.67	1.63	1.58	1.54	1.49	1.43	1.31	52.4	N61	2.31	1.5

Overall total efficiency, r/min and FMEG values are per ISO 12759 installation category D. FLC @ 400V / 50Hz. A variable speed drive is integrated within the fan.

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product Code	Speed r/min	Airflow SFP	Airflow m³/s @ Static Pressure Pa.												Overall Efficiency%	FMEG	Motor Electrical Data
Product Code	Speed r/min	Airflow SFP	0	25	50	75	100	150	200	250	300	350	400	500	Overall Efficiency%	FMEG	FLC Amps	Input kW
SQS100-1ACL	2545	m³/s	0.081	0.078	0.076	0.073	0.07	0.062	0.051	0.039	0.025	09			19.6	N42	0.34	0.063
SQS100-1ACL	2545	W/(L/s)	0.79	0.81	0.83	0.86	0.9	0.99	1.16	1.45	2.08	5.5			19.6	N42	0.34	0.063
SQS125-1ACL	2526	m³/s	0.101	0.096	0.092	0.087	0.082	0.071	0.059	0.045	0.027	05			20.7	N43	0.35	0.065
SQS125-1ACL	2526	W/(L/s)	0.65	0.68	0.71	0.74	0.78	0.89	1.04	1.31	1.99	8.87			20.7	N43	0.35	0.065
SQS150-1ACL	2515	m³/s	0.13	0.122	0.114	0.106	0.099	0.084	0.069	0.052	0.031	07			22.6	N45	0.35	0.066
SQS150-1ACL	2515	W/(L/s)	0.47	0.51	0.56	0.61	0.66	0.77	0.93	1.18	1.79	6.85			22.6	N45	0.35	0.066
SQS200-1ACL	2504	m³/s	0.24	0.23	0.22	0.21	0.19	0.17	0.15	0.13	0.11	0.08	0.06		24.5	N44	0.66	0.141
SQS200-1ACL	2504	W/(L/s)	0.56	0.6	0.64	0.68	0.72	0.82	0.93	1.07	1.26	1.53	2.03		24.5	N44	0.66	0.141
SQS250-1ACL	2449	m³/s	0.34	0.33	0.32	0.31	0.3	0.27	0.24	0.21	0.18	0.15	0.13	0.08	26.4	N44	0.99	0.217
SQS250-1ACL	2449	W/(L/s)	0.59	0.62	0.64	0.67	0.71	0.79	0.89	1.02	1.18	1.35	1.57	2.33	26.4	N44	0.99	0.217
SQS315 -1ACL	1289	m³/s	0.39	0.38	0.36	0.33	0.3	0.22	0.13	0.05					19.7	N38	0.84	0.179
SQS315 -1ACL	1289	W/(L/s)	0.45	0.47	0.5	0.54	0.59	0.79	1.22	2.75					19.7	N38	0.84	0.179
SQS400-1ACL	1378	m³/s	0.68	0.66	0.64	0.62	0.59	0.54	0.46	0.36	0.23	0.09			34.2	N50	1.5	0.293
SQS400-1ACL	1378	W/(L/s)	0.37	0.39	0.42	0.44	0.47	0.54	0.62	0.75	1.04	2.15			34.2	N50	1.5	0.293
SQS500-1ACL	1216	m³/s	1.24	1.21	1.18	1.15	1.11	1.03	0.94	0.83	0.71	0.58	0.45	0.17	34.5	N47	2.97	0.642
SQS500-1ACL	1216	W/(L/s)	0.47	0.49	0.51	0.53	0.55	0.61	0.68	0.77	0.89	1.05	1.28	2.69	34.5	N47	2.97	0.642

Overall total efficiency, r/min and FMEG values are as per ISO 12759 installation category D.

Sound Data

SINGLE Phase - 200V-277V / 50Hz / 60Hz

EC Motors

Product Code		Sound Power Level dBW @ Octave Band Hz								dBA @ 3m
Product Code		63Hz	125Hz	250Hz	500Hz	1 k Hz	2 kHz	4 kHz	8 kHz	dBA @ 3m
SQS100-1ECL	Inlet	75	75	79	69	54	50	44	44	51
	Outlet	83	80	76	67	57	51	43	39	50
	Breakout	62	70	70	62	57	51	48	47	44
SQS125-1ECL	Inlet	82	77	77	62	53	49	44	44	49
	Outlet	84	77	81	72	55	51	42	40	54
	Breakout	60	70	67	60	57	51	47	46	43
SQS150-1ECL	Inlet	89	74	75	65	56	52	48	47	49
	Outlet	83	77	79	68	56	54	50	48	51
	Breakout	66	64	66	62	57	52	47	44	43
SQS200-1ECL	Inlet	80	79	78	67	60	54	52	52	51
	Outlet	90	81	80	68	58	55	51	48	53
	Breakout	63	67	68	62	58	53	48	45	44
SQS250-1ECL	Inlet	78	76	77	64	55	50	49	47	49
	Outlet	80	76	75	64	55	54	49	44	48
	Breakout	59	65	71	60	55	49	43	41	44
SQS315 -1ECL	Inlet	78	77	83	63	50	52	48	47	54
	Outlet	80	77	81	67	60	52	47	44	53
	Breakout	68	70	76	64	58	53	47	46	48
SQS400-1ECL	Inlet	81	80	83	69	61	58	56	57	55
	Outlet	83	79	82	75	68	62	56	52	56
	Breakout	72	73	78	70	65	60	51	50	52
SQS500-1ECL	Inlet	77	76	67	62	57	54	51	51	45
	Outlet	77	80	71	64	58	51	46	42	47
	Breakout	74	80	74	66	60	54	48	44	49

Tests and preparation of the sound data have been carried out in accordance with BS 848 Part 2:1985 at 50% peak pressure. The In-Duct Sound Power Level Spectra are in dB re-1pW.
The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only.

THREE Phase - 380V-480V / 50Hz / 60Hz

EC Motors

Product Code		Sound Power Level dBW @ Octave Band Hz								dBA @ 3m
Product Code		63Hz	125Hz	250Hz	500Hz	1 k Hz	2 kHz	4 kHz	8 kHz	dBA @ 3m
SQS500-3ECL	Inlet	81	80	75	68	63	62	60	53	51
	Outlet	82	84	85	71	66	61	58	47	57
	Breakout	80	82	83	75	69	63	57	53	57

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product Code		Sound Power Level dBW @ Octave Band Hz								dBA @ 3m
Product Code		63Hz	125Hz	250Hz	500Hz	1 k Hz	2 kHz	4 kHz	8 kHz	dBA @ 3m
SQS100-1ACL	Inlet	68	71	71	53	46	40	39	32	43
	Outlet	76	74	72	60	49	41	41	31	45
	Breakout	56	68	66	51	48	43	41	39	39
SQS125-1ACL	Inlet	69	71	74	54	47	41	38	36	45
	Outlet	75	69	73	59	48	43	41	33	45
	Breakout	53	61	65	52	51	43	38	34	38
SQS150-1ACL	Inlet	67	65	80	53	48	42	40	39	51
	Outlet	77	68	81	60	49	44	43	35	52
	Breakout	53	57	67	53	50	43	38	35	39
SQS200-1ACL	Inlet	73	73	76	59	52	46	44	41	47
	Outlet	77	75	74	61	52	49	43	38	46
	Breakout	58	64	68	57	53	50	46	43	41
SQS250-1ACL	Inlet	74	77	79	62	53	49	46	44	50
	Outlet	75	73	78	62	53	50	45	40	49
	Breakout	61	68	70	59	53	47	41	39	43
SQS315 -1ACL	Inlet	69	76	61	50	38	39	37	29	40
	Outlet	70	75	61	52	47	37	34	27	40
	Breakout	58	64	57	51	45	38	32	27	33
SQS400-1ACL	Inlet	72	78	65	55	48	45	43	41	43
	Outlet	75	75	65	60	52	43	39	35	42
	Breakout	65	70	64	57	50	44	39	37	39
SQS500-1ACL	Inlet	74	74	63	58	52	50	46	49	42
	Outlet	74	74	67	60	53	47	41	39	43
	Breakout	75	80	69	64	55	47	40	38	47

Silencer Data

SINGLE Phase - 200V-277V / 50Hz / 60Hz

EC Motors

Product Code		dBA Attenuation
Product Code		300L	600L	900L	1200L
SQS100-1ECL	Inlet	-10	-15	-21	-23
SQS100-1ECL	Outlet	-8	-12	-17	-19
SQS125-1ECL	Inlet	-7	-11	-16	-19
SQS125-1ECL	Outlet	-9	-13	-18	-21
SQS150-1ECL	Inlet	-6	-9	-12	-15
SQS150-1ECL	Outlet	-7	-12	-15	-17
SQS200-1ECL	Inlet	-6	-10	-14	-17
SQS200-1ECL	Outlet	-5	-9	-12	-15
SQS250-1ECL	Inlet	-6	-10	-12	-14
SQS250-1ECL	Outlet	-6	-10	-12	-14
SQS315-1ECL	Inlet	-6	-8	-10	-14
SQS315-1ECL	Outlet	-6	-8	-10	-14
SQS400-1ECL	Inlet	-5	-7	-9	-13
SQS400-1ECL	Outlet	-6	-9	-11	-15

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product Code		dBA Attenuation
Product Code		300L	600L	900L	1200L
SQS100-1ACL	Inlet	-8	-13	-18	-20
SQS100-1ACL	Outlet	-8	-12	-18	-20
SQS125-1ACL	Inlet	-7	-12	-17	-20
SQS125-1ACL	Outlet	-8	-12	-17	-20
SQS150-1ACL	Inlet	-6	-12	-15	-17
SQS150-1ACL	Outlet	-6	-12	-15	-17
SQS200-1ACL	Inlet	-6	-10	-14	-17
SQS200-1ACL	Outlet	-6	-9	-13	-16
SQS250-1ACL	Inlet	-6	-10	-12	-14
SQS250-1ACL	Outlet	-6	-10	-12	-15
SQS315-1ACL	Inlet	-3	-5	-7	-10
SQS315-1ACL	Outlet	-4	-6	-8	-10
SQS400-1ACL	Inlet	-3	-5	-7	-9
SQS400-1ACL	Outlet	-4	-6	-8	-11

SINGLE Phase - 200V-277V / 50Hz / 60Hz

EC Motors

Product Code		dBA Attenuation
Product Code		1DENP	2DENP
SQS500-1ECL	Inlet	-7	-11
SQS500-1ECL	Outlet	-6	-10

THREE Phase - 380V-480V / 50Hz / 60Hz

EC Motors

Product Code		dBA Attenuation
Product Code		1DENP	2DENP
SQS500-3ECL	Inlet	-7	-12
SQS500-3ECL	Outlet	-6	-12

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product Code	Wiring Diagram No.
SH100-1ECL	152-00036
SH125-1ECL	152-00036
SH150-1ECL	152-00036
SH200-1ECL	152-00036
SH250-1ECL	152-00036
SH315-1ECL	152-00036

Fast Clamps (018)

For quick connection of spigotted fans to circular duct or accessories
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Silencers (068-JF)

Pre-galvanised sheet steel with perforated steel lining
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Silencers (068-D**P)

Pre-galvanised sheet steel with perforated steel lining
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Av Mounts (Rubber)

Spring AV mounts - zinc plated steel, rubber insert and foot pad
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Flexible Connectors (018)

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Panel Filters (018)

Filter access with removable panel
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Electric Heater Batteries

Safe and clean heating
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Electronic Voltage Controller

Electronic Voltage Controller
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