FSL – flaps for snow load requirement suitable for DVV smoke and heat extract fansSmoke and heat extract unit DVV with FSL flaps as accessories has the same rating as the basic unit, but snow load rating SL 1000. DVV with FSL flaps is suitable for installation on not heated buildings with snow load requirement SL 1000.SL 1000 according to EN 12101-3400°C/120min (F400) or 600°C/120min (F600), depends on basic DVV fanUp to 120°C continuous operationFlaps made from magnelis steel sheetVertical exhaustTested according to EN 12101-3 at TU MunichRecommended to order factory mounted on the fan (saving place for transportation, saving time and costs for mounting on site)It can be mounted after installation of fan, tooFSL flaps for DVV-XS, XL, XM, XP/F400, F600 can be mounted on the fan fitted with outlet silencer HSDV, too.
