• 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 FRQ5-4A V2 Inverter Speed Controller1 x ELTA - Single Phase Transformer 2amps1 x CBM 9-9 550w 4P VR (Open Motor)1 x Circular Ceiling Diffuser - TST 1252 x Electronic extractor fan speed controller - FSC 1.51 x Balance S Diffuser - NO RING - 125mm1 x PCA Diffuser - PCA-3151 x Circular Ceiling Diffuser - TST 2001 x Circular Ceiling Diffuser - TST 1001 x Curved Blade Grille 600x600 (2way blow)1 x EC6H - Reversible Group Fan Electronic Controller1 x JSR 200 Painted RAL50182 x Elta 3 Amp Electronic single phase speed controller with TK1 x Circular Ceiling Diffuser - TST 1601 x 5-Speed Controller for use with Elta SAX Classic Fans1 x ELTA - Single Phase Transformer 8amps3 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 16amps1 x EFSC-3N- Single Phase Speed Control1 x Airvent ceiling fan controller1 x Balance S Diffuser - NO RING - 100mm1 x Elta 3 Amp Electronic single phase speed controller.1 x Round ceiling diffuser 200mm1 x ELTA - Single Phase Transformer 12amps1 x Round ceiling diffuser 300mm1 x AIRVENT speed control - AIR4019611 x ELTA - Single Phase Transformer 4amps2 x COM-31 x Elta 6 Amp Electronic single phase speed controller.1 x EFSC-6N- Single Phase Speed Control1 x Round ceiling diffuser 250mm1 x PCA Diffuser - PCA-2501 x Round ceiling diffuser 350mm1 x ELTA - Single Phase Transformer 10amps1 x Remote Timer Control - 13511 x Run On Timer - 5s - 4hrs - RT5A2 x Push Timer Switch - ZA41 x Time Delay Unit - DT20B2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x 7 Day Programmable TIMECLOCK1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x ACO8AC/EC AutoChangeover panel1 x Elta ACO Panel 149-ACO14E1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EM30-24 Control Panel Commissioning Service1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3553 x Transformer 5 Speed Controller - ATC1-4TK1 x Elta Variable Speed Drive IP66 - 4.0KW1 x Elta 10 Amp Electronic single phase speed controller.1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x Vent Axia ACM 150 inline mixed flow duct fan1 x Single phase speed controller by auto-transformer - RMB 3.5 Amp2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x MWS 1.5 – Transformer Controller With Motor Protection1 x Envirovent G4 Filter - SL-G4/F71 x Vent Axia T-Series Controller1 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan2 x Remote controller FLEX - for VEKO INT1 x Helios TSW 7.5 Amp Transformer speed controller2 x Transformer 5 Speed Controller - ATC1-10TK2 x Transformer 5 Speed Controller - ATC1-8TK2 x Helios TSW 3 Amp Transformer speed controller1 x Transformer 5 Speed Controller - ATC1-12TK1 x Helios TSW MCB Amp Transformer speed controller2 x Three Phase Transformer controllers - RMT 1.5 Amp1 x Vent Axia ACM 100 inline mixed flow duct fan1 x Helios TSW 10 Amp Transformer speed controller1 x Vent Axia ACM 125 inline mixed flow duct fan1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x MWS 3 – Transformer Controller With Motor Protection1 x Isolator Switch - ISOSW1 x EC-Vent control board1 x ACO 149-ACO1/EDV1 x WS - Reversing Switch from Helios Fans2 x Helios HQW-200/2 - IP551 x Systemair Save Connect 2.0 Internet Module
BD9/9 centrifugal M4 0.35Kw
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