• 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 Helios TSD 3.0 Transformer Speed Control (400v)1 x FRQ5-4A V2 Inverter Speed Controller1 x FRQ-10A V2 Inverter Speed controller2 x Elta Variable Speed Drive IP66 - 2.2KW1 x FU 075 52 Frequency Inverter (IP20)1 x NKS-D swirl diffuser v-300 x 300mm1 x FU 15 40 Frequency Inverter1 x FU 22 25 Frequency Inverter2 x Helios TSW 0.3Amp Compact Transformer speed controller1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x Elta Variable Speed Drive IP66 - 5.5KW1 x FU 15 16 Frequency Inverter1 x Circular Ceiling Diffuser - TST 1252 x Elta Variable Speed Drive IP66 - 1.5KW1 x Elta Variable Speed Drive IP66 - 4.0KW1 x Frequency converter RUCK - FU 075 201 x Elta 10 Amp Electronic single phase speed controller.1 x Frequency converter FU 075 14 - IP661 x Elta Variable Speed Drive IP66 - 0.75KW1 x Circular Ceiling Diffuser - TST 1001 x Circular Ceiling Diffuser - TST 2001 x Frequency converter RUCK - FU 075 211 x FU 22 04 Frequency Inverter1 x FRQ5-10A Inverter Speed controller1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x ELTA - Three Phase Transformer 3amps1 x PCA Diffuser - PCA-3151 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Round ceiling diffuser 400mm1 x FU 075 04 Frequency Inverter (IP20)1 x JSR 200 Painted RAL50181 x Curved Blade Grille 600x600 (2way blow)1 x Balance S Diffuser - NO RING - 125mm1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER2 x Helios TSW 1.5 Amp Transformer speed controller1 x Balance S Diffuser - NO RING - 100mm1 x ELTA - Single Phase Transformer 2amps1 x Circular Ceiling Diffuser - TST 1601 x Round ceiling diffuser 200mm2 x Electronic extractor fan speed controller - FSC 1.52 x Round ceiling diffuser 300mm1 x EC6H - Reversible Group Fan Electronic Controller1 x Round ceiling diffuser 350mm1 x Round ceiling diffuser 250mm2 x Elta 6 Amp Electronic single phase speed controller with TK1 x EFSC-3N- Single Phase Speed Control1 x Elta 3 Amp Electronic single phase speed controller.2 x Elta 3 Amp Electronic single phase speed controller with TK1 x Elta 2 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 16amps1 x ELTA - Single Phase Transformer 8amps1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x ELTA - Single Phase Transformer 12amps1 x ELTA - Single Phase Transformer 4amps2 x AIRVENT speed control - AIR4019611 x Airvent ceiling fan controller2 x Elta 6 Amp Electronic single phase speed controller.3 x COM-32 x Remote Timer Control - 13511 x EFSC-6N- Single Phase Speed Control1 x Run On Timer - 5s - 4hrs - RT5A1 x ELTA - Single Phase Transformer 10amps3 x Multi Input Run On Timer - 0 - 20min - CFCU3 x Push Timer Switch - ZA41 x Helios ZNE Electronic Fan Overrun Timer1 x Time Delay Unit - DT20B2 x 7 Day Programmable TIMECLOCK2 x Helios HQW-200/2 - IP551 x TTC-2000 Three phase electric heater controller1 x ACO8AC/EC AutoChangeover panel1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Elta ACO Panel 149-ACO14E1 x EC-Vent control board1 x CONTROL ECOWATT - Basic1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x REB-CVF 0-10v Controller1 x EM30-24 Electro-Mechanical Control Panel1 x EC-Vent Room Unit3 x Systemair Save Connect 2.0 Internet Module1 x Elta ACO Panel 149-ACO18B1 x UB47- Universal Insulated Terminal1 x Egg Crate Grille with Dust panel filter 1 inch- 595x5951 x Single Deflection Grille 400mm with OBD damper1 x Helios ESA-1 Surface mounted Speed Control 1amp1 x Non Vision 150mm x 150mm (Air Transfer) Grille - With Flange - MILL FINISH2 x Mini Diffuser - 100mm1 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 fan3 x Remote controller FLEX - for VEKO INT2 x Transformer 5 Speed Controller - ATC1-4TK2 x Transformer 5 Speed Controller - ATC1-12TK2 x Three Phase Transformer controllers - RMT 1.5 Amp2 x Vent Axia ACM 150 inline mixed flow duct fan1 x Transformer speed controller - ATC1 - 1.5 Amps2 x Vent Axia ACM 200 inline mixed flow duct fan1 x Isolator Switch - ISOSW2 x Vent Axia ACM 125 inline mixed flow duct fan1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x TG-K Duct temperature sensor1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x Vent Axia T-Series Controller1 x Envirovent G4 Filter - SL-G4/F71 x Transformer (silent) speed controller - RE 3.0 Amp1 x Speed Controller - REB51 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x TG-K3/NTC10-01 - Duct temperature sensor1 x Transformer (silent) speed controller - RE 5.0 Amp1 x Speed Controller - REB1-N1 x Speed Controller - REB11 x MTS10- extractor fan 3 step switch1 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x MTP 10, 10K, Speed control1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x PIR Sensor - PIR21 x MEV Spider Wireless boost Switch - MEV-SWH-W1 x VTR 300 STD Filter Kit1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x CBT-100N Centrifugal1 x Contactor Interface Station - CI91 x Speed Controller - REB2.5-N1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x PIR Sensor - PIR41 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Helios HQW-250/4 - IP551 x SG-200 Fan Guard for the HQW 2001 x EM30-24 Control Panel Commissioning Service1 x QPTW 250C Acoustic Twin Fan with Controller1 x Silentub - STUB 1001 x VEKA INT 2000/15.0-L1 EKO1 x Elta Wall Cowl SWC56/631 x SAVE VSR 300 heat recovery unit1 x Elta Wall Cowl SWC35/402 x Vent Axia ACM 100 inline mixed flow duct fan1 x Compact SCD450/4-1AC1 x Elta Wall Cowl SWC45/501 x Elta - Room Sensor - Temp/Humid/C021 x GRA-100 External Grill by S&P1 x Elta Wall Cowl SWC25/311 x Silentub - STUB 2001 x CFI In-line 150 - Carbon Filter1 x 100mm Round Connector with Damper1 x Elta SCP400/4-1AC - IP551 x Duct Termination with Mesh - 100mm1 x AXC TP - 100mm Plastic Centrifugal Inline Fan1 x CBB-60N Centrifugal1 x Universal Pipe Fixing Clip1 x Helios SVR EC 160 B – SlimVent Centrifugal Fan Box1 x Flat Roof Terminal -OFT 5 - Asphalt1 x RUCK MTP 20, 10K, Speed control1 x MEV Spider Additional Spigots1 x Duct Termination with Mesh - 150mm1 x Quietflow Twin SQTDCV250-1ECL2 x Envirovent 4 Way Remote Control Switch - SWHBKRF-43 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x CPTA-E Flush mounted PIR sensor with timer1 x Transformer 5 Speed Controller - ATC1-2TK1 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE2 x Helios TSW 3 Amp Transformer speed controller1 x REU 7amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost1 x Helios TSW 7.5 Amp Transformer speed controller1 x RTRD - Three Phase Speed Controller - 2 Amp1 x Transformer 5 Speed Controller - ATC1-10TK1 x Transformer 5 Speed Controller - ATC1-8TK2 x CS2 Current Switch2 x DEF-140T Inlet Guard for the CBT-100N1 x MV-B Dual Switch for use with Helios HQW plate fans,1 x ERR 20/1 Centrifugal inline fan1 x Two Speed Switch - REGUL-21 x WS - Reversing Switch from Helios Fans1 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x Transformer Speed Control - RTRE- 12.0Amp1 x REE-1 Electronic Speed Controller1 x Speed Controller - REB31 x MWS 3 – Transformer Controller With Motor Protection
Reviews
Transformer (silent) speed controller - RE 1.5 Amp
Transformer (silent) speed controller - RE 1.5 Amp
£ 132.29

Unbelievable! With TDmixvent500: noise reduction minimum 50%...