Elta Multiflow SMB400/4-3AC Inline Mixed Flow Box Fan Three Phase AC - 400mm

The Elta Multiflow SMB400/4-3AC is a 400mm square inline mixed flow box fan with a three phase AC motor, moving up to 2545 m³/h in free air and still delivering 1084 m³/h against 200 Pa. It fits straight into 400mm ductwork on Ductmate flanges at each end.The 4 pole motor runs at 1390 rpm on a 380 to 415V 50Hz supply, absorbing 0.208 kW with a peak current of 0.52 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 2545 m³/h Speed Controllable What it is best used forShort to medium duct runs on a three phase supply: plant room and lift motor room ventilation, toilet and changing area extract in offices and schools, small restaurant and cafe extract, and general HVAC supply or extract where the duct is 400mm. It keeps 2164 m³/h at 100 Pa, which suits a typical run of a few bends, a grille and a short length of duct.It runs out of pressure at 200 Pa (1084 m³/h there), so it is the wrong choice for long runs with heat exchangers, heavy filtration or attenuators. For that kind of system resistance step up to the SMB450/4-3AC, which still moves 2578 m³/h at 200 Pa.Why choose this over alternativesThe three phase SMB400/4-3AC and the single phase SMB400/4-1AC move almost the same air in free air (2545 against 2552 m³/h). The three phase motor draws only 0.52 A per phase at 400V against 1.09 A on the single phase model, which helps where several fans share a three phase distribution board. If a 230V supply is all you have, the single phase version is the better buy.The SMB's Ductmate flanged casing bolts straight into the duct run and can be mounted at any angle. If you need more pressure, the one size up SMB450/4-3AC reaches 300 Pa.Installation notes Mount the fan at any angle in the duct, securely supported, and leave access for maintenance. It weighs 16 kg. Connect wit