• 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

3 x Elta Variable Speed Drive IP66 - 2.2KW1 x FRQ5-4A V2 Inverter Speed Controller1 x Helios TSD 5.5 Transformer Speed Control (400v)1 x FU 15 40 Frequency Inverter1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 7.5KW1 x Frequency converter RUCK - FU 075 201 x Elta Variable Speed Drive IP66 - 4.0KW1 x Frequency converter FU 075 14 - IP662 x Elta Variable Speed Drive IP66 - 0.75KW1 x FU 22 25 Frequency Inverter1 x FU 075 52 Frequency Inverter (IP20)1 x ELTA - Three Phase Transformer 10amps1 x ELTA - Three Phase Transformer 3amps1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x FU 15 16 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 5.5KW3 x Elta Variable Speed Drive IP66 - 1.5KW1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x FU 075 04 Frequency Inverter (IP20)1 x Frequency converter RUCK - FU 075 211 x FU 22 04 Frequency Inverter1 x Frequency converter RUCK - FU 075 381 x NKS-D swirl diffuser v-300 x 300mm1 x Circular Ceiling Diffuser - TST 1001 x Balance S Diffuser - NO RING - 125mm1 x Circular Ceiling Diffuser - TST 2001 x JSR 200 Painted RAL50181 x Round ceiling diffuser 400mm1 x Curved Blade Grille 600x600 (2way blow)1 x Versio Square Ceiling Diffusers - RS141 x Circular Ceiling Diffuser - TST 1601 x Balance S Diffuser - NO RING - 100mm1 x Round ceiling diffuser 300mm2 x Round ceiling diffuser 200mm1 x RDS 11 Helios Transformer Controller With Motor Protection2 x Round ceiling diffuser 250mm1 x PCA Diffuser - PCA-2501 x Round ceiling diffuser 350mm1 x TTC-2000 Three phase electric heater controller3 x ACO8AC/EC AutoChangeover panel2 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Elta ACO Panel 149-ACO14E1 x EC-Vent control board1 x CONTROL ECOWATT - Basic1 x EM30-24 Electro-Mechanical Control Panel1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x EC-Vent Room Unit1 x Elta ACO Panel 149-ACO18B3 x Systemair Save Connect 2.0 Internet Module1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EM30-24 Control Panel Commissioning Service1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Elta Wall Cowl SWC56/631 x GRA-100 External Grill by S&P1 x Elta Louvre Shutter - 400mm1 x Elta Wall Cowl SWC35/401 x Elta Wall Cowl SWC25/311 x Elta Wall Cowl SWC45/501 x Jet Cowl - 315mm1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 7101 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 FINISH2 x Mini Diffuser - 100mm1 x Multi Input Run On Timer - 0 - 20min - CFCU2 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 fan1 x Remote controller FLEX - for VEKO INT1 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE2 x Transformer 5 Speed Controller - ATC1-4TK2 x Transformer 5 Speed Controller - ATC1-10TK2 x Vent Axia ACM 150 inline mixed flow duct fan2 x RTRD - Three Phase Speed Controller - 2 Amp2 x Helios TSW 1.5 Amp Transformer speed controller2 x Vent Axia ACM 200 inline mixed flow duct fan3 x COM-32 x Vent Axia ACM 125 inline mixed flow duct fan1 x Isolator Switch - ISOSW2 x DEF-140T Inlet Guard for the CBT-100N2 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x Single phase speed controller by auto-transformer - RMB 3.5 Amp3 x BEAS-control module1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x 7 Day Programmable TIMECLOCK3 x Elta 6 Amp Electronic single phase speed controller with TK2 x Envirovent G4 Filter - SL-G4/F71 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)2 x Vent Axia T-Series Controller1 x Speed Controller - REB32 x Remote Timer Control - 13511 x Speed Controller - REB51 x Transformer (silent) speed controller - RE 3.0 Amp1 x Electronic extractor fan speed controller - FSC 1.51 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT1 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x Transformer (silent) speed controller - RE 1.5 Amp1 x ACO 149-ACO1/EDV1 x Transformer (silent) speed controller - RE 5.0 Amp1 x REB-CVF 0-10v Controller1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)2 x Speed Controller - REB1-N1 x RDH FLEX-SQUARE - ADH/RDH 04501 x MTP 10, 10K, Speed control1 x Transformer Speed Control - RTRE- 5.0Amp1 x PIR Sensor - PIR21 x Quietflow SQS400-1ECL - Centrifugal Box Fan1 x Silent 100 Window Kit - windowS1 x Speed Controller - REB11 x CBM 9-9 550w 4P VR (Open Motor)1 x Transformer Speed Control - RTRE- 1.5Amp1 x Vent Axia Silent 100T (TIMER)1 x Speed Controller - REB82 x MTS10- extractor fan 3 step switch2 x PIR Sensor - PIR41 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x UB47- Universal Insulated Terminal1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x CBT-100N Centrifugal1 x Speed Controller - REB161 x Contactor Interface Station - CI91 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x GENIOX 11 Internal Mounted Unit1 x AIRVENT speed control - AIR4019611 x SAVE VSR 300 heat recovery unit1 x Silentub - STUB 1001 x EBM-Papst D4E225-BC01-17 Double inlet1 x LFBR 315 G4 - Helios Inline Filter Box - 315mm1 x Electrostatic Precipitator - 1H x 3W1 x VEKA INT 2000/15.0-L1 EKO1 x Biflow SB400-CON2-3 - High Temperature Bifurcated Fan1 x TD160-NT Mixvent - 100mm - TD160 Timer1 x DS-2 2-Speed Switch (3 Phase)1 x Vertical Cowl and Fan (Single Phase) - RAV400-4-11 x CFI In-line 150 - Carbon Filter1 x CBM Low Pressure Centrifugal Fan - CBM 9/7 4 Pole 373watt CVR2 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR1 x CBA-100 Inlet Flange for CBT-1002 x VTR 500 STD Filter Kit1 x IR24-P - Presence detector1 x RD35S-4DW.6W.3L - 122297 (Three Phase)1 x 100mm Round Connector with Damper1 x AXC TP - 150mm Plastic Centrifugal Inline Fan1 x CBT-80N Centrifugal1 x Quietflow Twin SQTDCV250-1ECL1 x GENIOX 11 Roof Mounted External Unit1 x CBB-60N Centrifugal1 x Potentiometer EGH 01 - for DDMP Fans1 x Duct Termination with Mesh - 150mm1 x ACO3TO-ADS-VFC-7.1A1 x DDMP 10-10 1F 1000W M6A2 DA51 x Helios ZNE Electronic Fan Overrun Timer1 x Vent Axia Trickle & Boost Switch1 x RUCK MTP 20, 10K, Speed control2 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x Push Timer Switch - ZA42 x Three Phase Transformer controllers - RMT 1.5 Amp1 x Transformer 5 Speed Controller - ATC1-12TK2 x Transformer speed controller - ATC1 - 1.5 Amps2 x PM230-TF, AC 230V Damper Actuator, Spring Return, 2 x SPDT, 72C Thermal Fuse1 x Vent Axia ACM 100 inline mixed flow duct fan1 x TG-K Duct temperature sensor1 x Two Speed Switch - REGUL-21 x Helios HQW-630/4 - IP551 x EFSC-3N- Single Phase Speed Control2 x Skyflow SSR Horizontal Roof Cowl SSR31/35B1 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Elta - Room Sensor - Temp/Humid/C021 x VTR 300 STD Filter Kit1 x Quietflow SQS100-1ECL - Centrifugal Box Fan1 x Helios RR-250-C Centrifugal inline fan1 x CBP-18/18-RC Belt Driven Centrifugal Fans1 x CSB-60 Centrifugal fan1 x Duct Termination with Mesh - 100mm1 x CBT-130N Centrifugal ATEX II 3D ExtD 125*C1 x Duct Termination with Mesh - 450mm1 x CBS-100 Outlet Flange for CBT-1001 x KBA- Inlet Mounting 1802 x Envirovent 4 Way Remote Control Switch - SWHBKRF-42 x Temperature Fan Speed Controller - ATCP4-WMS2 x Speed controller with Reverse - REB-1R1 x Transformer 5 Speed Controller - ATC1-8TK1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x MWS 5 – Transformer Controller With Motor Protection Unit1 x Capacitor 2uf for use with the EBM A4E range1 x RDS 1 Helios Transformer Controller With Motor Protection1 x MWS-75 Transformer controller with TK -7.5A1 x CS2 Current Switch1 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT1 x MWS 3 – Transformer Controller With Motor Protection1 x RRB- transformer controller1 x TD EVO-100 PF ECOWATT - Environmentally Friendly Energy Efficient Inline Fan1 x Elta 3 Amp Electronic single phase speed controller with TK1 x TEM 075 - 5 Speed Transformer Speed Control1 x MWS 1.5 – Transformer Controller With Motor Protection1 x ERR 20/1 Centrifugal inline fan1 x WS - Reversing Switch from Helios Fans1 x Vortice Quadro Micro 100 I - Standard Version1 x Helios HQW-200/4 - IP551 x TG-K3/NTC10-01 - Duct temperature sensor
Reviews
TD-SILENT 350/125
TD-SILENT 350/125
£ 178.68

Excellent low noise fan, I've got one unit running years and...