• Model:SQS250-1ECL

Quietflow SQS250-1ECL - Centrifugal Box Fan

£ 1,259.39 (excl. VAT)

£ 1,511.27 (inc. VAT)


Quietflow SQS250-1ECL - Centrifugal Box Fan

• Standard size 250 mm
• Air volume flow rates up to 0.347 m3/s
• Static pressures up to 841 Pa
• Suitable for operating temperatures up to +60℃
• Robust galvanised sheet steel casing
Acoustically lined single in-line centrifugal fans, suitable for internal duct mounting. The Quietflow incorporates advanced backward curved impellers, with three ndimensional profiled blades.

Low Noise
Each unit is acoustically lined internally with Class O rated (BS 476 Parts 6 and 7) fire resistant acoustic foam lining minimising breakout noise levels.

Easy Installation
New multi-mount brackets allow easy mounting in a range of orientations.

Easy Commissioning
Integrated commissioning control allowing single speed selection and also limiting maximum speed if used with an external potentiometer.

Efficient Performance
High efficiency low tonal noise backward curved centrifugal impellers are directly driven by an EC external rotor motor, provide low specific fan powers and stepless speed control without tonal noise generation.

Weather Resistance
Units can be weatherproofed in the factory to allow external installation.

PDF Files


SQS250-1ECL Specification Sheets

1 x NKS-D swirl diffuser v-300 x 300mm1 x PCA Diffuser - PCA-3151 x Circular Ceiling Diffuser - TST 1001 x Circular Ceiling Diffuser - TST 1601 x Round ceiling diffuser 250mm3 x TTC-2000 Three phase electric heater controller1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Elta Wall Cowl SWC35/401 x Elta Wall Cowl SWC45/501 x GRA-100 External Grill by S&P1 x Elta Wall Cowl SWC25/311 x Elta Louvre Shutter - 400mm1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 7101 x Jet Cowl - 315mm1 x Egg Crate Grille with G2 Dust panel filter 1 inch- 300x3001 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Elta Variable Speed Drive IP66 - 7.5KW1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 2.2KW1 x FRQ5-4A V2 Inverter Speed Controller1 x FRQ-10A V2 Inverter Speed controller1 x Helios VDS-7 Three Phase Transformer 5-Step1 x FU 15 40 Frequency Inverter1 x FU 22 25 Frequency Inverter1 x Helios TSD 5.5 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 0.75KW1 x Frequency converter FU 075 14 - IP661 x Circular Ceiling Diffuser - TST 1251 x FU 075 52 Frequency Inverter (IP20)1 x Elta 10 Amp Electronic single phase speed controller.1 x Elta Variable Speed Drive IP66 - 4.0KW1 x Elta Variable Speed Drive IP66 - 1.5KW1 x Frequency converter RUCK - FU 075 201 x ELTA - Three Phase Transformer 3amps1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x Elta Variable Speed Drive IP66 - 5.5KW1 x FU 15 16 Frequency Inverter1 x ELTA - Three Phase Transformer 10amps1 x Circular Ceiling Diffuser - TST 2001 x Round ceiling diffuser 400mm1 x FRQ5-10A Inverter Speed controller1 x Frequency converter RUCK - FU 075 211 x FU 22 04 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x FU 075 04 Frequency Inverter (IP20)1 x Curved Blade Grille 600x600 (2way blow)1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x Balance S Diffuser - NO RING - 125mm1 x Versio Square Ceiling Diffusers - RS141 x Balance S Diffuser - NO RING - 100mm1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x ELTA - Single Phase Transformer 2amps1 x Round ceiling diffuser 200mm1 x Electronic extractor fan speed controller - FSC 1.51 x Round ceiling diffuser 350mm1 x EC6H - Reversible Group Fan Electronic Controller1 x Round ceiling diffuser 300mm1 x EFSC-3N- Single Phase Speed Control1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Elta 2 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 16amps1 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 8amps1 x Elta 3 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 12amps1 x Airvent ceiling fan controller1 x AIRVENT speed control - AIR4019611 x ELTA - Single Phase Transformer 4amps1 x Remote Timer Control - 13511 x COM-31 x Elta 6 Amp Electronic single phase speed controller.1 x PCA Diffuser - PCA-2501 x Run On Timer - 5s - 4hrs - RT5A1 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)1 x ELTA - Single Phase Transformer 10amps1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x Helios ZNE Electronic Fan Overrun Timer1 x Time Delay Unit - DT20B1 x Push Timer Switch - ZA41 x 7 Day Programmable TIMECLOCK1 x TG-K Duct temperature sensor1 x Transformer (silent) speed controller - RE 3.0 Amp1 x ACO8AC/EC AutoChangeover panel1 x Elta ACO Panel 149-ACO14E1 x CONTROL ECOWATT - Basic1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5002 x EM30-24 Electro-Mechanical Control Panel1 x EC-Vent Room Unit1 x Speed Controller - REB1-N1 x Speed Controller - REB11 x Elta ACO Panel 149-ACO18B1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x EM30-24 Control Panel Commissioning Service1 x REB-CVF 0-10v Controller1 x PIR Sensor - PIR21 x Elta Wall Cowl SWC56/631 x QPTW 250C Acoustic Twin Fan with Controller1 x EBM-Papst D4E225-BC01-17 Double inlet1 x Potentiometer EGH 01 - for DDMP Fans1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Multi Input Run On Timer - 0 - 20min - CFCU1 x EFSC-6N- Single Phase Speed Control1 x EC-Vent control board1 x Egg Crate Grille with Dust panel filter 1 inch- 595x5951 x Single Deflection Grille 400mm with OBD damper1 x Non Vision 150mm x 150mm (Air Transfer) Grille - With Flange - MILL FINISH1 x Mini Diffuser - 100mm1 x Economy Airvent 100mm Fan with Timer1 x Economy Airvent 150mm Fan With Pullcord & Shutters1 x Egg Crate Grille with Dust panel filter 1 inch- 300x3001 x Universal Pipe Fixing Clip1 x RUCK MTP 20, 10K, Speed control1 x DV-ROF-V-225 Roof mounted unit1 x Duct Termination with Mesh - 200mm1 x TD ECOWATT 2000/315 Inline Duct Fan - TD-ECOWATT1 x DV-ROF-V-315 Roof mounted unit1 x Silentub - STUB 1001 x DPD 12PM Delivery Surcharge1 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Manrose Window Extractor - WF150AP1 x Vent Axia W300310 Controller Electronic 1.5A1 x D2E-146-AP47-751 x LFBR 315 G4 - Helios Inline Filter Box - 315mm1 x Electrostatic Precipitator - 1H x 3W1 x ACO3TO-ADS-VFC-7.1A1 x AXC TP - 150mm Plastic Centrifugal Inline Fan1 x Same Day Shipping Surcharge - City Sprint1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x Helios TSW 1.5 Amp Transformer speed controller1 x TDP-D Pressure Sensor with Display1 x Transformer speed controller - ATC1 - 1.5 Amps1 x Two Speed Switch - REGUL-21 x Envirovent G4 Filter - SL-G4/F7
Reviews
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Look good, works well, except the shaft of the lanellae cuts...