• 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 TTC-2000 Three phase electric heater controller1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x ACO8AC/EC AutoChangeover panel1 x CONTROL ECOWATT - Basic1 x EC-Vent control board1 x EM30-24 Electro-Mechanical Control Panel1 x ACO 149-ACO1/EDV1 x Elta ACO Panel 149-ACO18B2 x Systemair Save Connect 2.0 Internet Module1 x EC-Vent Room Unit1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EM30-24 Control Panel Commissioning Service1 x Elta ACO Panel 149-ACO14E1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Easy-fix termination kit - High Rise Ventilator - EFT1 x GRA-100 External Grill by S&P1 x Elta Louvre Shutter - 400mm1 x ELTA - Single Phase Transformer 10amps1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)1 x Vent Axia ACM 100 inline mixed flow duct fan1 x Run On Timer - 5s - 4hrs - RT5A2 x Remote Timer Control - 13512 x Push Timer Switch - ZA41 x Helios ZNE Electronic Fan Overrun Timer2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Time Delay Unit - DT20B1 x 7 Day Programmable TIMECLOCK1 x TG-K Duct temperature sensor1 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Silent 100 Window Kit - windowS1 x ELTA - Single Phase Transformer 2amps2 x Electronic extractor fan speed controller - FSC 1.51 x EC6H - Reversible Group Fan Electronic Controller1 x Elta 2 Amp Electronic single phase speed controller.2 x COM-31 x AIRVENT speed control - AIR4019611 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x ELTA - Single Phase Transformer 4amps1 x EFSC-6N- Single Phase Speed Control1 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)1 x Elta 6 Amp Electronic single phase speed controller.1 x Elta Wall Cowl SWC56/631 x Elta Wall Cowl SWC25/311 x Speed Controller - REB1-N1 x Elta 10 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 16amps1 x ELTA - Single Phase Transformer 8amps1 x Elta 6 Amp Electronic single phase speed controller with TK1 x EFSC-3N- Single Phase Speed Control3 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Transformer (silent) speed controller - RE 5.0 Amp1 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Transformer 5 Speed Controller - ATC1-4TK1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x Envirovent G4 Filter - SL-G4/F71 x Vent Axia T-Series Controller1 x Transformer (silent) speed controller - RE 3.0 Amp1 x Transformer (silent) speed controller - RE 1.5 Amp1 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS1 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Elta Variable Speed Drive IP66 - 2.2KW1 x REB-CVF 0-10v Controller1 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x CS2 Current Switch1 x Isolator Switch - ISOSW
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