• 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 Elta Variable Speed Drive IP66 - 2.2KW1 x Helios TSD 3.0 Transformer Speed Control (400v)1 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 ELTA - Three Phase Transformer 10amps3 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x JSR 200 Painted RAL50181 x PCA Diffuser - PCA-2501 x Round ceiling diffuser 250mm1 x Elta Variable Speed Drive IP66 - 1.5KW1 x FRQ5-10A Inverter Speed controller1 x ELTA - Three Phase Transformer 3amps1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x NKS-D swirl diffuser v-300 x 300mm2 x Multi Input Run On Timer - 0 - 20min - CFCU2 x FU 15 40 Frequency Inverter2 x Elta Variable Speed Drive IP66 - 7.5KW2 x Helios TSD 5.5 Transformer Speed Control (400v)2 x FU 075 52 Frequency Inverter (IP20)4 x Elta Variable Speed Drive IP66 - 0.75KW2 x FRQ5-4A V2 Inverter Speed Controller1 x Frequency converter RUCK - FU 075 202 x FU 075 04 Frequency Inverter (IP20)2 x Frequency converter RUCK - FU 075 212 x FU 22 04 Frequency Inverter1 x Balance S Diffuser - NO RING - 125mm1 x Circular Ceiling Diffuser - TST 1251 x Circular Ceiling Diffuser - TST 1001 x PCA Diffuser - PCA-3151 x Curved Blade Grille 600x600 (2way blow)1 x Round ceiling diffuser 400mm1 x Circular Ceiling Diffuser - TST 1601 x Versio Square Ceiling Diffusers - RS143 x Helios VDS-7 Three Phase Transformer 5-Step1 x Round ceiling diffuser 200mm1 x Balance S Diffuser - NO RING - 100mm1 x Round ceiling diffuser 300mm1 x Round ceiling diffuser 350mm2 x Push Timer Switch - ZA41 x Run On Timer - 5s - 4hrs - RT5A1 x Remote Timer Control - 13511 x Envirovent 4 Way Remote Control Switch - SWHBKRF-43 x Vent Axia ACM 150 inline mixed flow duct fan1 x FU 15 16 Frequency Inverter1 x FRQ-10A V2 Inverter Speed controller1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Three Phase Transformer controllers - RMT 1.5 Amp2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x CS2 Current Switch1 x Helios ZNE Electronic Fan Overrun Timer2 x COM-31 x ACO8AC/EC AutoChangeover panel1 x Time Delay Unit - DT20B1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x TTC-2000 Three phase electric heater controller2 x Isolator Switch - ISOSW3 x Vent Axia ACM 125 inline mixed flow duct fan3 x Transformer (silent) speed controller - RE 3.0 Amp1 x 7 Day Programmable TIMECLOCK1 x QPTW 250C Acoustic Twin Fan with Controller2 x TG-K Duct temperature sensor2 x Vent Axia ACM 100 inline mixed flow duct fan1 x Elta ACO Panel 149-ACO14E2 x Systemair Save Connect 2.0 Internet Module2 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x EC-Vent control board1 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Silent 100 Window Kit - windowS1 x Speed Controller - REB12 x MWS 1.5 – Transformer Controller With Motor Protection1 x Helios HQW-200/4 - IP551 x EC-Vent Room Unit1 x WS - Reversing Switch from Helios Fans2 x Envirovent G4 Filter - SL-G4/F71 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 630
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