• 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 - 7.5KW1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x FRQ5-4A V2 Inverter Speed Controller1 x FRQ-10A V2 Inverter Speed controller1 x Elta Variable Speed Drive IP66 - 2.2KW1 x FU 15 40 Frequency Inverter1 x FU 22 25 Frequency Inverter1 x Helios TSD 5.5 Transformer Speed Control (400v)1 x FU 075 52 Frequency Inverter (IP20)1 x Frequency converter RUCK - FU 075 201 x Frequency converter FU 075 14 - IP661 x Elta 10 Amp Electronic single phase speed controller.1 x NKS-D swirl diffuser v-300 x 300mm1 x Elta Variable Speed Drive IP66 - 4.0KW1 x Frequency converter RUCK - FU 075 381 x Circular Ceiling Diffuser - TST 1251 x ELTA - Three Phase Transformer 3amps1 x ELTA - Three Phase Transformer 10amps1 x Elta Variable Speed Drive IP66 - 5.5KW1 x FU 15 16 Frequency Inverter1 x PCA Diffuser - PCA-3151 x Frequency converter RUCK - FU 075 211 x FU 22 04 Frequency Inverter1 x FRQ5-10A Inverter Speed controller1 x FU 075 04 Frequency Inverter (IP20)1 x Circular Ceiling Diffuser - TST 2001 x Circular Ceiling Diffuser - TST 1001 x Round ceiling diffuser 400mm1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x ELTA - Single Phase Transformer 2amps1 x Balance S Diffuser - NO RING - 125mm1 x Circular Ceiling Diffuser - TST 1601 x Versio Square Ceiling Diffusers - RS143 x Electronic extractor fan speed controller - FSC 1.51 x Balance S Diffuser - NO RING - 100mm1 x Round ceiling diffuser 200mm1 x EC6H - Reversible Group Fan Electronic Controller1 x Round ceiling diffuser 300mm1 x EFSC-3N- Single Phase Speed Control1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Round ceiling diffuser 350mm1 x Round ceiling diffuser 250mm1 x Elta 2 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 16amps2 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 8amps1 x Elta 3 Amp Electronic single phase speed controller.3 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)3 x AIRVENT speed control - AIR4019614 x Airvent ceiling fan controller1 x Elta 6 Amp Electronic single phase speed controller.1 x EFSC-6N- Single Phase Speed Control3 x COM-31 x PCA Diffuser - PCA-2501 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)1 x Run On Timer - 5s - 4hrs - RT5A1 x ELTA - Single Phase Transformer 10amps1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)1 x Helios ZNE Electronic Fan Overrun Timer2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Time Delay Unit - DT20B3 x Push Timer Switch - ZA41 x 7 Day Programmable TIMECLOCK3 x Elta Variable Speed Drive IP66 - 0.75KW2 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)2 x JSR 200 Painted RAL50182 x Curved Blade Grille 600x600 (2way blow)2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Transformer 5 Speed Controller - ATC1-12TK1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT2 x Vent Axia T-Series Controller1 x Envirovent G4 Filter - SL-G4/F72 x Vent Axia ACM 100 inline mixed flow duct fan3 x Transformer (silent) speed controller - RE 3.0 Amp3 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan2 x Single phase speed controller by auto-transformer - RMB 1.5 Amp3 x Single phase speed controller by auto-transformer - RMB 3.5 Amp2 x Isolator Switch - ISOSW2 x RRB- transformer controller1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Remote Timer Control - 13511 x Helios HQW-400/4 - IP551 x Transformer Speed Control - RTRE- 12.0Amp1 x Envirovent 4 Way Remote Control Switch - SWHBKRF-43 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan2 x Remote controller FLEX - for VEKO INT2 x Transformer 5 Speed Controller - ATC1-4TK2 x Transformer 5 Speed Controller - ATC1-8TK2 x Vent Axia ACM 200 inline mixed flow duct fan3 x MWS 3 – Transformer Controller With Motor Protection3 x Single phase speed controller by auto-transformer - RMB 8.0 Amp2 x WS - Reversing Switch from Helios Fans1 x Helios HQW-630/4 - IP552 x REE-1 Electronic Speed Controller2 x Helios HQW-315/4 - IP551 x Two Speed Switch - REGUL-21 x Helios HQW-200/2 - IP552 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x DEF-140T Inlet Guard for the CBT-100N2 x Vent Axia ACM 150 inline mixed flow duct fan1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x KMBI 250 Connector rectangular/circular to install on the discharge of CMT1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x Isolator Switch - EFF-ISO2 x Helios HQW-200/4 - IP552 x Helios TSW 7.5 Amp Transformer speed controller1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x Speed Controller - REB52 x Transformer (silent) speed controller - RE 1.5 Amp1 x Elta Wall Cowl SWC56/631 x CBS-60 Outlet Flange for CSB/CBT-601 x TD Mixvent 800/200 EEXEIIT31 x Speed Controller - REB13 x Vent Axia ACM 125 inline mixed flow duct fan1 x Elta Wall Cowl SWC35/402 x Helios TSW 3 Amp Transformer speed controller1 x Helios TSW 1.5 Amp Transformer speed controller1 x Transformer 5 Speed Controller - ATC1-10TK2 x Three Phase Transformer controllers - RMT 1.5 Amp2 x Transformer 5 Speed Controller - ATC1-2TK2 x Helios TSW 0.3Amp Compact Transformer speed controller1 x RDS 11 Helios Transformer Controller With Motor Protection2 x Helios TSW MCB Amp Transformer speed controller2 x MV-B Dual Switch for use with Helios HQW plate fans,1 x CS2 Current Switch1 x Systemair Save Connect 2.0 Internet Module1 x BEAS-control module1 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT1 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x ELTA - Single Phase Transformer 4amps1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x Transformer Speed Control - RTRE- 1.5Amp1 x Commercial Single or 3 phase Fan Reversing Switch - RS1
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%...