• 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 Helios TSW MCB Amp Transformer speed controller3 x CS2 Current Switch2 x Push Timer Switch - ZA43 x MWS 3 – Transformer Controller With Motor Protection1 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)4 x Vent Axia ACM 125 inline mixed flow duct fan2 x Remote Timer Control - 13513 x Isolator Switch - ISOSW1 x Run On Timer - 5s - 4hrs - RT5A2 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x Helios ZNE Electronic Fan Overrun Timer3 x Elta 6 Amp Electronic single phase speed controller with TK1 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Helios TSW 1.5 Amp Transformer speed controller1 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Time Delay Unit - DT20B1 x TTC-2000 Three phase electric heater controller2 x MWS 1.5 – Transformer Controller With Motor Protection1 x 7 Day Programmable TIMECLOCK4 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x TG-K Duct temperature sensor3 x WS - Reversing Switch from Helios Fans1 x ACO8AC/EC AutoChangeover panel1 x ACOAS/ AC/EC Auto Changeover 8Amp2 x EC6H - Reversible Group Fan Electronic Controller1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x BEAS-control module2 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x Elta Variable Speed Drive IP66 - 1.5KW1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x Elta ACO Panel 149-ACO14E1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT1 x Electronic extractor fan speed controller - FSC 1.51 x Helios HQW-630/4 - IP551 x CONTROL ECOWATT - Basic1 x EC-Vent control board1 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x TG-K3/NTC10-01 - Duct temperature sensor2 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x CBS-60 Outlet Flange for CSB/CBT-601 x Transformer (silent) speed controller - RE 3.0 Amp1 x EM30-24 Electro-Mechanical Control Panel1 x Vent Axia T-Series Controller2 x Transformer Speed Control - RTRE- 12.0Amp2 x Helios HQW-200/4 - IP551 x Two Speed Switch - REGUL-21 x Transformer Speed Control - RTRE- 7.0Amp1 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT1 x DEF-140T Inlet Guard for the CBT-100N1 x CBA-60 Inlet Flange for CBT-601 x TUNE-R-200-3-M1 - Control Damper1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x Transformer (silent) speed controller - RE 1.5 Amp1 x Systemair Save Connect 2.0 Internet Module1 x EC-Vent Room Unit1 x RDS 7 Helios Transformer Controller With Motor Protection1 x ACO 149-ACO1/EDV1 x MTP 10, 10K, Speed control1 x SG-200 Fan Guard for the HQW 2001 x Multiflow SMB550/4-1AC1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x Helios HQW-200/2 - IP551 x Helios HQW-315/4 - IP551 x Elta 6 Amp Electronic single phase speed controller.1 x Speed Controller - REB51 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Elta Variable Speed Drive IP66 - 2.2KW1 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x QPTW 250C Acoustic Twin Fan with Controller1 x RDH FLEX-SQUARE - ADH/RDH 04501 x MTS10- extractor fan 3 step switch1 x Elta ACO Panel 149-ACO18B1 x REB-CVF 0-10v Controller1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x HIMF - Mixed Flow Fan 100mm Inline Fan1 x Transformer 5 Speed Controller - ATC1-8TK
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