Elta Multiflow SMB450/4-3AC Inline Mixed Flow Box Fan Three Phase AC - 450mm

The Elta Multiflow SMB450/4-3AC is a 450mm square inline mixed flow box fan with a three phase AC motor, moving up to 3920 m³/h in free air and still delivering 533 m³/h against 300 Pa. It fits straight into 450mm ductwork on Ductmate flanges at each end.The 4 pole motor runs at 1375 rpm on a 380 to 415V 50Hz supply, absorbing 0.378 kW with a peak current of 0.88 A, and has sealed for life bearings. The casing is stiffened pre-galvanised sheet steel, the impeller has 7 backward curved aerofoil blades in high performance composite, and it handles air up to 60°C. Elta give a 12 month warranty. 3 Phase AC Motor Up to 3920 m³/h Speed Controllable What it is best used forMedium sized commercial extract and supply on a three phase supply with 450mm ductwork: restaurant and commercial kitchen extract (behind a filtered canopy), lift motor rooms, plant rooms, warehouse offices and general HVAC. It holds 3290 m³/h at 100 Pa and 2578 m³/h at 200 Pa, so it copes with a run that includes a silencer and several fittings.Its curve falls away sharply after 250 Pa (533 m³/h at 300 Pa), so for high resistance systems or anything over about 4000 m³/h choose the SMB550/4-3AC instead.Why choose this over alternativesAgainst the single phase SMB450, the three phase SMB450/4-3AC moves a little more air (3920 against 3830 m³/h at 0 Pa) and draws 0.88 A per phase at 400V instead of 2.05 A on a single phase supply. Against the SMB400/4-3AC, it adds about 1400 m³/h and goes on to 300 Pa where the 400 stops at 200 Pa.The SMB500/4-3AC has almost identical performance with a 500mm connection, so pick between them on duct size.Installation notes Mount the fan at any angle in the duct, securely supported, and leave access for maintenance. It weighs 23 kg. Connect with the 450mm Ductmate flanges at each end. Elta's 450mm flexible connectors (063-0450-MFB) and anti vibration mounts (062-002) reduce transmitted noise and vibration. Wire to Elta diagram 152-106A: star connection for a 400V three phas