• 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 NKS-D swirl diffuser v-300 x 300mm1 x Elta 10 Amp Electronic single phase speed controller.1 x Circular Ceiling Diffuser - TST 1251 x PCA Diffuser - PCA-3151 x Circular Ceiling Diffuser - TST 1001 x Circular Ceiling Diffuser - TST 2001 x Balance S Diffuser - NO RING - 125mm1 x Round ceiling diffuser 400mm1 x JSR 200 Painted RAL50181 x ELTA - Single Phase Transformer 2amps1 x Curved Blade Grille 600x600 (2way blow)1 x Circular Ceiling Diffuser - TST 1601 x Versio Square Ceiling Diffusers - RS143 x Electronic extractor fan speed controller - FSC 1.51 x Balance S Diffuser - NO RING - 100mm1 x Round ceiling diffuser 200mm2 x EC6H - Reversible Group Fan Electronic Controller1 x Round ceiling diffuser 300mm5 x Elta 6 Amp Electronic single phase speed controller with TK1 x Elta 3 Amp Electronic single phase speed controller.1 x Elta 3 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 16amps1 x ELTA - Single Phase Transformer 8amps1 x Airvent ceiling fan controller1 x AIRVENT speed control - AIR4019611 x ELTA - Single Phase Transformer 12amps1 x ELTA - Single Phase Transformer 4amps1 x PCA Diffuser - PCA-2501 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)4 x COM-31 x EFSC-6N- Single Phase Speed Control2 x Elta 6 Amp Electronic single phase speed controller.1 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)3 x Remote Timer Control - 13511 x Run On Timer - 5s - 4hrs - RT5A1 x ELTA - Single Phase Transformer 10amps1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)1 x Helios ZNE Electronic Fan Overrun Timer3 x Push Timer Switch - ZA43 x Multi Input Run On Timer - 0 - 20min - CFCU2 x 7 Day Programmable TIMECLOCK1 x TTC-2000 Three phase electric heater controller1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x ACO8AC/EC AutoChangeover panel1 x EC-Vent control board1 x Elta ACO Panel 149-ACO14E1 x CONTROL ECOWATT - Basic1 x ACO 149-ACO1/EDV1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x EM30-24 Electro-Mechanical Control Panel1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x EC-Vent Room Unit1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x Elta ACO Panel 149-ACO18B2 x Systemair Save Connect 2.0 Internet Module1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x EM30-24 Control Panel Commissioning Service1 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x Elta Wall Cowl SWC56/631 x Elta Wall Cowl SWC35/401 x GRA-100 External Grill by S&P1 x Elta Wall Cowl SWC25/311 x Elta Louvre Shutter - 400mm1 x TDP-D Pressure Sensor with Display1 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 Egg Crate Grille with Dust panel filter 1 inch- 595x5951 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 Egg Crate Grille with Dust panel filter 1 inch- 300x3001 x Economy Airvent 150mm Fan With Pullcord & Shutters2 x EFSC-3N- Single Phase Speed Control1 x Elta 2 Amp Electronic single phase speed controller.2 x Helios TSW 7.5 Amp Transformer speed controller3 x Three Phase Transformer controllers - RMT 1.5 Amp3 x Vent Axia ACM 150 inline mixed flow duct fan3 x Vent Axia T-Series Controller2 x Transformer (silent) speed controller - RE 3.0 Amp2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x PIR Sensor - PIR22 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan2 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan2 x Transformer 5 Speed Controller - ATC1-10TK3 x Transformer 5 Speed Controller - ATC1-4TK2 x Helios TSW 3 Amp Transformer speed controller3 x Transformer 5 Speed Controller - ATC1-12TK2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x RDS 11 Helios Transformer Controller With Motor Protection1 x Helios TSW 1.5 Amp Transformer speed controller3 x Vent Axia ACM 200 inline mixed flow duct fan2 x DEF-140T Inlet Guard for the CBT-100N3 x Vent Axia ACM 125 inline mixed flow duct fan1 x Isolator Switch - ISOSW3 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x RRB- transformer controller1 x TG-K Duct temperature sensor2 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x BEAS-control module1 x Speed Controller - REB51 x CBS-60 Outlet Flange for CSB/CBT-601 x Transformer (silent) speed controller - RE 1.5 Amp1 x Speed Controller - REB101 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT1 x Transformer Speed Control - RTRE- 7.0Amp1 x Transformer (silent) speed controller - RE 5.0 Amp1 x Speed Controller - REB1-N1 x CBM 9-9 550w 4P VR (Open Motor)1 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Transformer Speed Control - RTRE- 1.5Amp1 x DEF-CBM-RE-7 - Protection Guard1 x MTS10- extractor fan 3 step switch1 x Speed Controller - REB11 x REE-2 Electronic Speed Controller2 x MTP 10, 10K, Speed control1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x Vent Axia Silent 100T (TIMER)1 x Elta Variable Speed Drive IP66 - 2.2KW2 x Transformer speed controller - ATC1 - 1.5 Amps1 x CS2 Current Switch1 x Two Speed Switch - REGUL-21 x EBM-Papst D2E097-BK76-98 Double inlet1 x Speed Controller - REB32 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x ELM 25 EX Flexible Cuff for ERM 251 x Quietflow SQS400-1ECL - Centrifugal Box Fan1 x TD Mixvent 800/200 EEXEIIT31 x Silent 100 Window Kit - windowS1 x Speed Controller - REB2.5-N1 x ELM 20 EX Flexible Cuff for ERM 221 x DDMP 09/09 Mounting Flange1 x FFR 355 Filter Cassette1 x QPTW 250C Acoustic Twin Fan with Controller1 x UB47- Universal Insulated Terminal1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x Silentub - STUB 1002 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan2 x Transformer 5 Speed Controller - ATC1-8TK3 x Vent Axia ACM 100 inline mixed flow duct fan3 x Single phase speed controller by auto-transformer - RMB 3.5 Amp2 x Single phase speed controller by auto-transformer - RMB 10.0 Amp2 x Envirovent G4 Filter - SL-G4/F72 x Transformer Speed Control - RTRE- 12.0Amp2 x Helios HQW-630/4 - IP552 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x TG-K3/NTC10-01 - Duct temperature sensor1 x Transformer Speed Control - RTRE- 5.0Amp2 x Helios HQW-315/4 - IP552 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS1 x RDH FLEX-SQUARE - ADH/RDH 04502 x Envirovent 4 Way Remote Control Switch - SWHBKRF-41 x CPTA-E Flush mounted PIR sensor with timer2 x Speed controller with Reverse - REB-1R3 x Temperature Fan Speed Controller - ATCP4-WMS1 x Remote controller FLEX - for VEKO INT2 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x Helios TSW MCB Amp Transformer speed controller1 x Three Phase 3 step - 10amp Transformer controller for use with the HV Wall Mounted fans.2 x Insulated extract Plenum 8+12 x Insulated extract Plenum 6+12 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT1 x ERR 20/1 Centrifugal inline fan1 x TD EVO-100 PF ECOWATT - Environmentally Friendly Energy Efficient Inline Fan1 x ELM 18 EX Flexible Cuff for ERM 182 x Transformer 5 Speed Controller - ATC1-2TK1 x MWS 3 – Transformer Controller With Motor Protection2 x TEM 075 - 5 Speed Transformer Speed Control2 x Vent Axia SC5001 - Speed controller3 x WS - Reversing Switch from Helios Fans2 x MWS 1.5 – Transformer Controller With Motor Protection
BD7/7 centrifugal M4 0.13Kw
BD7/7 centrifugal M4 0.13Kw
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