• 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 MWS 1.5 – Transformer Controller With Motor Protection2 x Helios HQW-200/4 - IP551 x FU 15 16 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 5.5KW1 x ELTA - Three Phase Transformer 10amps1 x ELTA - Single Phase Transformer 2amps1 x Elta 2 Amp Electronic single phase speed controller.1 x Curved Blade Grille 600x600 (2way blow)1 x ELTA - Single Phase Transformer 8amps1 x JSR 200 Painted RAL50182 x COM-31 x EFSC-3N- Single Phase Speed Control1 x Elta 6 Amp Electronic single phase speed controller with TK1 x Elta 3 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 12amps1 x ELTA - Single Phase Transformer 16amps1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x ELTA - Single Phase Transformer 4amps1 x Circular Ceiling Diffuser - TST 1601 x Round ceiling diffuser 400mm1 x AIRVENT speed control - AIR4019611 x Versio Square Ceiling Diffusers - RS141 x Circular Ceiling Diffuser - TST 2002 x Round ceiling diffuser 200mm1 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)1 x EFSC-6N- Single Phase Speed Control1 x Balance S Diffuser - NO RING - 100mm2 x Elta 6 Amp Electronic single phase speed controller.1 x PCA Diffuser - PCA-2501 x Round ceiling diffuser 300mm1 x Round ceiling diffuser 250mm1 x ELTA - Single Phase Transformer 10amps1 x Round ceiling diffuser 350mm1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)1 x Run On Timer - 5s - 4hrs - RT5A1 x Push Timer Switch - ZA42 x Helios HQW-250/4 - IP551 x Helios ESA-1 Surface mounted Speed Control 1amp2 x Elta Variable Speed Drive IP66 - 2.2KW1 x Helios TSD 5.5 Transformer Speed Control (400v)1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 7.5KW1 x FU 15 40 Frequency Inverter1 x FRQ5-4A V2 Inverter Speed Controller1 x Elta Variable Speed Drive IP66 - 0.75KW2 x Elta Variable Speed Drive IP66 - 1.5KW1 x FRQ5-10A Inverter Speed controller1 x Frequency converter RUCK - FU 075 201 x FU 22 25 Frequency Inverter1 x Frequency converter FU 075 14 - IP661 x Elta Variable Speed Drive IP66 - 4.0KW1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x Frequency converter RUCK - FU 075 211 x FU 075 04 Frequency Inverter (IP20)1 x ELTA - Three Phase Transformer 3amps1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x Elta 10 Amp Electronic single phase speed controller.1 x FU 22 04 Frequency Inverter1 x Balance S Diffuser - NO RING - 125mm2 x Electronic extractor fan speed controller - FSC 1.51 x NKS-D swirl diffuser v-300 x 300mm1 x EC6H - Reversible Group Fan Electronic Controller1 x Circular Ceiling Diffuser - TST 1251 x Circular Ceiling Diffuser - TST 1002 x Elta 3 Amp Electronic single phase speed controller with TK1 x Airvent ceiling fan controller1 x PCA Diffuser - PCA-3151 x Helios ZNE Electronic Fan Overrun Timer1 x Time Delay Unit - DT20B1 x 7 Day Programmable TIMECLOCK1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT1 x ACO8AC/EC AutoChangeover panel1 x TTC-2000 Three phase electric heater controller1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x EM30-24 Electro-Mechanical Control Panel1 x Elta ACO Panel 149-ACO14E1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x EC-Vent control board1 x Elta ACO Panel 149-ACO18B1 x ACO 149-ACO1/EDV1 x Systemair Save Connect 2.0 Internet Module1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x EC-Vent Room Unit1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x SG-200 Fan Guard for the HQW 2001 x EM30-24 Control Panel Commissioning Service1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x WS - Reversing Switch from Helios Fans1 x Transformer (silent) speed controller - RE 3.0 Amp1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Egg Crate Grille with Dust panel filter 1 inch- 300x3001 x Multi Input Run On Timer - 0 - 20min - CFCU1 x FU 075 52 Frequency Inverter (IP20)1 x Transformer 5 Speed Controller - ATC1-12TK1 x Isolator Switch - ISOSW1 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)1 x Envirovent G4 Filter - SL-G4/F71 x REB-CVF 0-10v Controller2 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x MTP 10, 10K, Speed control1 x Compact SCD450/4-1AC1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x Duct Termination with Mesh - 100mm1 x CO2 Room Sensor - CO2-R1 x Biflow SB400-CON2-3 - High Temperature Bifurcated Fan1 x Contactor Interface Station - CI91 x Elta SCP400/4-1AC - IP551 x Vent Axia ACM 150 inline mixed flow duct fan1 x Transformer 5 Speed Controller - ATC1-4TK1 x PM230-TF, AC 230V Damper Actuator, Spring Return, 2 x SPDT, 72C Thermal Fuse1 x Helios TSW 0.3Amp Compact Transformer speed controller1 x Three Phase Transformer controllers - RMT 1.5 Amp1 x Helios TSW 3 Amp Transformer speed controller1 x Helios TSW 1.5 Amp Transformer speed controller1 x Vent Axia ACM 125 inline mixed flow duct fan1 x TG-K Duct temperature sensor1 x Transformer speed controller - ATC1 - 1.5 Amps1 x BEAS-control module1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x DEF-140T Inlet Guard for the CBT-100N1 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...