• 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 PCA Diffuser - PCA-3151 x Circular Ceiling Diffuser - TST 1251 x Circular Ceiling Diffuser - TST 1001 x Circular Ceiling Diffuser - TST 2001 x Round ceiling diffuser 400mm1 x Balance S Diffuser - NO RING - 125mm1 x JSR 200 Painted RAL50181 x Curved Blade Grille 600x600 (2way blow)1 x Balance S Diffuser - NO RING - 100mm1 x Versio Square Ceiling Diffusers - RS141 x Circular Ceiling Diffuser - TST 1601 x Round ceiling diffuser 200mm1 x Round ceiling diffuser 300mm1 x Round ceiling diffuser 350mm1 x PCA Diffuser - PCA-2502 x Remote Timer Control - 13511 x Push Timer Switch - ZA41 x Time Delay Unit - DT20B1 x 7 Day Programmable TIMECLOCK1 x TTC-2000 Three phase electric heater controller2 x ACOAS/ AC/EC Auto Changeover 8Amp1 x EM30-24 Electro-Mechanical Control Panel1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EC-Vent Room Unit1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Elta ACO Panel 149-ACO18B2 x Systemair Save Connect 2.0 Internet Module1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x EM30-24 Control Panel Commissioning Service1 x Elta Wall Cowl SWC56/631 x GRA-100 External Grill by S&P1 x Elta Wall Cowl SWC45/501 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 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 Run On Timer - 5s - 4hrs - RT5A1 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan3 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan1 x Helios TSW 7.5 Amp Transformer speed controller1 x Transformer 5 Speed Controller - ATC1-4TK1 x Transformer 5 Speed Controller - ATC1-12TK1 x Round ceiling diffuser 250mm1 x Three Phase Transformer controllers - RMT 1.5 Amp1 x Vent Axia ACM 125 inline mixed flow duct fan1 x Helios ZNE Electronic Fan Overrun Timer1 x Isolator Switch - ISOSW1 x Elta 6 Amp Electronic single phase speed controller with TK2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x TG-K Duct temperature sensor2 x ACO8AC/EC AutoChangeover panel1 x EC-Vent control board2 x BEAS-control module1 x CONTROL ECOWATT - Basic1 x Envirovent G4 Filter - SL-G4/F71 x ACO 149-ACO1/EDV1 x Transformer (silent) speed controller - RE 3.0 Amp1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x Speed Controller - REB51 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Quietflow SQS400-1ECL - Centrifugal Box Fan1 x Helios HQW-400/4 - IP551 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x MTP 10, 10K, Speed control1 x REB-CVF 0-10v Controller1 x REE-2 Electronic Speed Controller1 x Elta Wall Cowl SWC35/401 x VTR 300 STD Filter Kit1 x Contactor Interface Station - CI91 x Egg Crate Grille with Dust panel filter 1 inch- 595x5951 x Vent Axia ACM 100 inline mixed flow duct fan1 x CBS-60 Outlet Flange for CSB/CBT-601 x EBM-Papst D3G133-BF05-14 Double inlet1 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR1 x VTR 500 STD Filter Kit1 x CO2 Room Sensor - CO2-R1 x CBT-100N Centrifugal1 x DDMP 12-12 3F 1810W M6A4 DG01 x CBA-100 Inlet Flange for CBT-1001 x CBS-100 Outlet Flange for CBT-1001 x 100mm Round Connector with Damper1 x Helios TSW 3 Amp Transformer speed controller1 x RDS 11 Helios Transformer Controller With Motor Protection1 x Speed Controller - REB1-N1 x Duct Termination with Mesh - 100mm1 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x CS2 Current Switch1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x COM-31 x Elta ACO Panel 149-ACO14E1 x Electronic extractor fan speed controller - FSC 1.51 x WS - Reversing Switch from Helios Fans1 x Helios HQW-630/4 - IP55
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