The . ECH91BL. to be a main focal point in any kitchen. The . ECH91BL. has 3 speeds with push button control a twin fan motor and built in lights for good illumination. Features . Ducted/recirculating installation3 speedsAluminium grease filtersPush button controlTwin fan motorGlass light diffuser . Energy . Energy rating E . Lighting . Number of lights 2 . Filters . Number of grease filters 3Number of charcoal filters (optional) 2Charcoal filter code CHA24Ducting kit AED61/63/64 . Extraction Rates & Noise . Extraction rate 427 m/hrNoise level 64 dBAExtraction rate at first speed 265 m/hrNoise level at first speed 60 dBAExtraction rate at second speed 323 m/hrNoise level at second speed 62 dBAExtraction rate at third speed 427 m/hrNoise level at third speed 64 dBA . Technical Specifications . Required height over gas hob 700mmRequired height over electric hob 600mmRated electrical power 140 WPower supply required 3 A . .