• 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 Run On Timer - 5s - 4hrs - RT5A1 x Remote Timer Control - 13512 x Push Timer Switch - ZA41 x Elta Variable Speed Drive IP66 - 7.5KW1 x FU 15 40 Frequency Inverter1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x FRQ-10A V2 Inverter Speed controller1 x FU 075 52 Frequency Inverter (IP20)1 x FRQ5-4A V2 Inverter Speed Controller1 x FU 22 25 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 4.0KW1 x FU 15 16 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x ELTA - Three Phase Transformer 3amps1 x ELTA - Three Phase Transformer 10amps1 x FU 075 04 Frequency Inverter (IP20)1 x FU 22 04 Frequency Inverter1 x Elta 10 Amp Electronic single phase speed controller.1 x Frequency converter RUCK - FU 075 211 x ELTA - Single Phase Transformer 2amps1 x Electronic extractor fan speed controller - FSC 1.52 x EC6H - Reversible Group Fan Electronic Controller1 x Elta 2 Amp Electronic single phase speed controller.2 x Elta 3 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 8amps1 x Airvent ceiling fan controller1 x ELTA - Single Phase Transformer 16amps2 x Elta 6 Amp Electronic single phase speed controller with TK1 x Elta 3 Amp Electronic single phase speed controller.1 x EFSC-3N- Single Phase Speed Control1 x ELTA - Single Phase Transformer 12amps4 x COM-31 x ELTA - Single Phase Transformer 4amps1 x AIRVENT speed control - AIR4019611 x EFSC-6N- Single Phase Speed Control1 x ELTA - Single Phase Transformer 10amps1 x Elta Variable Speed Drive IP66 - 1.5KW1 x Elta Variable Speed Drive IP66 - 5.5KW1 x FRQ5-10A Inverter Speed controller2 x Vent Axia ACM 150 inline mixed flow duct fan1 x 7 Day Programmable TIMECLOCK3 x Multi Input Run On Timer - 0 - 20min - CFCU2 x Envirovent 4 Way Remote Control Switch - SWHBKRF-42 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan2 x Remote controller FLEX - for VEKO INT1 x Frequency converter RUCK - FU 075 202 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans3 x Helios TSW 3 Amp Transformer speed controller3 x Three Phase Transformer controllers - RMT 1.5 Amp1 x Vent Axia ACM 100 inline mixed flow duct fan1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)4 x Vent Axia ACM 125 inline mixed flow duct fan2 x Transformer 5 Speed Controller - ATC1-4TK2 x Isolator Switch - ISOSW3 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x Helios TSW 7.5 Amp Transformer speed controller2 x Transformer 5 Speed Controller - ATC1-10TK2 x Transformer 5 Speed Controller - ATC1-8TK1 x Helios TSW 0.3Amp Compact Transformer speed controller1 x Systemair Save Connect 2.0 Internet Module1 x TG-K Duct temperature sensor2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x Helios ZNE Electronic Fan Overrun Timer2 x Temperature Fan Speed Controller - ATCP4-WMS2 x Helios TSW 1.5 Amp Transformer speed controller1 x Transformer 5 Speed Controller - ATC1-12TK1 x MV-B Dual Switch for use with Helios HQW plate fans,2 x CS2 Current Switch1 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Single phase speed controller by auto-transformer - RMB 8.0 Amp2 x Helios HQW-200/2 - IP551 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x Envirovent G4 Filter - SL-G4/F71 x Transformer speed controller - ATC1 - 1.5 Amps1 x ACO8AC/EC AutoChangeover panel1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x WS - Reversing Switch from Helios Fans1 x MWS 1.5 – Transformer Controller With Motor Protection1 x MWS 3 – Transformer Controller With Motor Protection1 x TG-K3/NTC10-01 - Duct temperature sensor1 x Vent Axia T-Series Controller1 x TTC-2000 Three phase electric heater controller1 x Helios HQW-630/4 - IP55
BD7/7 centrifugal M4 0.13Kw
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