Axial roof exhaust fan REF-550 GMC AIR

Axial roof exhaust fan REF-550

• Axial roof extract fans.
• Different types to be used for exhaust and supply air purposes.
• Range of 11 impeller diameters from 200 up to 800 mm.
• Air displacement of up to 24.000 m³/h.
• Available with nominal speeds of 1000, 1500 or 3000 rpm.
• Suitable for single-phase 230V, 50Hz or threephases 400V, 50Hz connections.
• Designed to give hirh air flow values at a max. efficiency and min. noise level.
• Has different types to be used for exhaust and supply purposes.
• Housing is made of glass fibre reinforced polyester, guaranteeing long life and light weighted body for the fan.
• Has a low profile on the roof, giving an esthetic loof for the roof.
• Fitted with inflow and outflow edges and a square mounting base made of light grey (RAL 7001) polyester for types 200 and 250 and of sendzimir sheet steel for types 300 to 800.
• Covered by a light grey (RAL 7001) polyester rain cover.
• The exhaust side of the exhaust version has a protective screen.
• Designed for maximum air displacement with minimum noise production and power consumption.
• Diameters 200 and 250 have a 5 vane impeller made from coated sendzimir sheet steel.
• Diameters 300 to 550 have a 4 vane impeller with an aluminium hub and stainless steel vanes.
• Diameters 630 to 800 have a 6 or 10 vane impeller with an aluminium hub and high quality synthetic vanes.
• Short-circuited armature motor with maintenance-free bearings and external cooling.
• Motor casing of injection-moulded aluminium.
• Insulation class B. Protection class IP 54 (splash proof), diameter 200-250 IP 44.
• Standard permissible ambient temperature for all motors is -30°C to +40°C.
• Motor and impeller are fully geared to one