• 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

3 x CS2 Current Switch1 x 7 Day Programmable TIMECLOCK1 x TTC-2000 Three phase electric heater controller2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)4 x Isolator Switch - ISOSW4 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x MWS 3 – Transformer Controller With Motor Protection1 x ACO8AC/EC AutoChangeover panel1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Elta ACO Panel 149-ACO14E1 x EC-Vent control board2 x Systemair Save Connect 2.0 Internet Module3 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x CONTROL ECOWATT - Basic4 x Elta 6 Amp Electronic single phase speed controller with TK3 x COM-31 x ACO 149-ACO1/EDV1 x EM30-24 Electro-Mechanical Control Panel1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection2 x TG-K Duct temperature sensor3 x TG-K3/NTC10-01 - Duct temperature sensor1 x Elta ACO Panel 149-ACO18B1 x EC-Vent Room Unit3 x WS - Reversing Switch from Helios Fans1 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 CMT2 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE2 x Remote Timer Control - 13511 x Single phase speed controller by auto-transformer - RMB 3.5 Amp2 x MWS 1.5 – Transformer Controller With Motor Protection2 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp2 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR3 x Electronic extractor fan speed controller - FSC 1.52 x BEAS-control module1 x Envirovent G4 Filter - SL-G4/F72 x EC6H - Reversible Group Fan Electronic Controller1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x CBM 9-9 550w 4P VR (Open Motor)2 x Helios HQW-200/4 - IP551 x Multiflow SMB550/4-1AC2 x Vent Axia Silent 100T (TIMER)1 x Isolator Switch - EFF-ISO2 x Helios HQW-630/4 - IP552 x Vent Axia T-Series Controller1 x Easy-fix termination kit - High Rise Ventilator - EFT2 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x TG-R room temperature sensor2 x Speed Controller - REB101 x REE-1 Electronic Speed Controller1 x VTR 300 STD Filter Kit1 x Elta 6 Amp Electronic single phase speed controller.2 x PIR Sensor - PIR21 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x 220x90mm Insulated Rectangular Horizontal 45° Bend1 x Transformer (silent) speed controller - RE 3.0 Amp1 x UB47- Universal Insulated Terminal1 x Elta Variable Speed Drive IP66 - 0.75KW1 x Helios HQW-200/2 - IP551 x RDH FLEX-SQUARE - ADH/RDH 04501 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 500
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