• 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

2 x Transformer 5 Speed Controller - ATC1-4TK4 x Transformer 5 Speed Controller - ATC1-8TK1 x Versio Square Ceiling Diffusers - RS142 x Helios TSW 3 Amp Transformer speed controller1 x Balance S Diffuser - NO RING - 100mm1 x Round ceiling diffuser 200mm2 x Helios TSW MCB Amp Transformer speed controller2 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Vent Axia ACM 150 inline mixed flow duct fan3 x Helios TSW 7.5 Amp Transformer speed controller1 x Elta 3 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 4amps1 x AIRVENT speed control - AIR4019611 x EFSC-6N- Single Phase Speed Control2 x Vent Axia ACM 100 inline mixed flow duct fan5 x Vent Axia ACM 125 inline mixed flow duct fan4 x Helios TSW 1.5 Amp Transformer speed controller1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)2 x Three Phase Transformer controllers - RMT 1.5 Amp1 x Remote Timer Control - 13511 x Run On Timer - 5s - 4hrs - RT5A4 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x Push Timer Switch - ZA41 x Helios ZNE Electronic Fan Overrun Timer3 x MWS 3 – Transformer Controller With Motor Protection3 x CS2 Current Switch1 x Temperature Fan Speed Controller - ATCP4-WMS1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Helios TSW 0.3Amp Compact Transformer speed controller2 x MV-B Dual Switch for use with Helios HQW plate fans,1 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)2 x Isolator Switch - ISOSW2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x TTC-2000 Three phase electric heater controller2 x COM-31 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x 7 Day Programmable TIMECLOCK1 x ACO8AC/EC AutoChangeover panel1 x ACOAS/ AC/EC Auto Changeover 8Amp2 x Elta 6 Amp Electronic single phase speed controller with TK1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x Elta ACO Panel 149-ACO14E1 x Systemair Save Connect 2.0 Internet Module1 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x CONTROL ECOWATT - Basic1 x EC-Vent control board1 x EM30-24 Electro-Mechanical Control Panel2 x EC6H - Reversible Group Fan Electronic Controller1 x Helios HQW-200/2 - IP551 x ACO 149-ACO1/EDV1 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x BEAS-control module1 x Elta ACO Panel 149-ACO18B3 x MWS 1.5 – Transformer Controller With Motor Protection1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x Envirovent G4 Filter - SL-G4/F72 x WS - Reversing Switch from Helios Fans1 x EC-Vent Room Unit
BD7/7 centrifugal M4 0.13Kw
BD7/7 centrifugal M4 0.13Kw
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