_:n0057ddd29c5b4924a301ec0d376fd70bxb0
<http://schema.org/description>
"Features\n\n\n High performance centrifugal fans.\n\nDynamically balanced.\nInspection door that facilitates maintenance.\n\nVersatile design can be installed in any position.\n\nCentrifugal backward curved impeller, to prevent accumulation of dirt. \n\n\nRemote terminal box, to ease installation and maintenance and connection to external controls.\n\n \nRange of rectangular duct fans suitable for many general ventilation applications where the fan is required to be installed within a rectangular ducted ventilation system or where the space for installation is limited.All models suitable for mounting in any orientation. Casing manufactured from heavy gauge galvanised sheet steel. Direct drive backward curved impellers manufactured from aluminium sheet. External rotor motor, Class F insulation with thermal protection.\n \nMotor\nMotor and impeller fitted on the inspection cover enabling easy cleaning and maintenance.\n\nIRB models: Single-phase 230V-50Hz.\nIP44* or IP54. Speed controllable by transformer.\nIRT models: Three-phase 230/400V-50Hz.\n\nIP54. Speed controllable by transformer or frequency drive.* IP44: 2-180, 2-200, 4-225 and 4-315 A\n\n\n \nManuals &amp; GuidesS&amp;P IRT Inline Rectangular Duct Fan Datasheet\n"
<https://www.efans.co.uk/products/s-p-irt-4-400b-inline-rectangular-duct-fan>