MRH Roof Fans

MRH roof hatch with axial fan for smoke and heat extraction •    Version for installation on flat roof •    Vertical exhaust•    Certified for insertion of axial fan with motor inside air stream•    Tested to F400 (400°C/2h) requirement up to EN 12101-3•    SL 1000 respectively SL 1250 at size 1250 (EN 12101-3)•    WL 1500 (EN 12101-2), wind suction load•    CPR certificate by BSI (EU and UK)•    Insulation thickness: walls 120 mm, cover 150 mm•    Thermal transmittance class T2•    Electrically operated spindle actuator for hatch cover opening•    Serially equipped with power supply 230V AC --> 24V DC for actuators of hatch cover•    Indication for opened/closed hatch cover position (switches)•    Robust structure•    Sucking side connection acc. Eurovent 1/2•    Exhaust protective grid is included•    On request: F300 fans, decorative painting, supply/pressurisation unit, without fanMRH, motorised roof hatch is used in case of fire to extract smoke gases from the room. Smoke-free escape ways increase the chances to rescue people in case of fire.In the serially available version the hatch is intended for emergency use only (without EMC protection, without PTC in motor).Dual-use additional safety elements are necessary to reduce risks associated with hatch closing. The product has been tested up to Re 10000 cycles of open-close. For installation on the tops of buildings with snow load SL 1000 (SL 1250 for size 1250) and wind suction load WL 1500, the casing consists of a double metal layer with mineral wool insulation. The hatch casing is constructed of ZM (ZnAlMg coated) steel, while the hatch cover is made of AlMg3. Service switches, separate for motor and actuator(s), are serially installed on the hatch casing. Separate power supply for the fan and hatch actuator(s) is required, with electrical connections located within the service switches. When selecting the AES exhaust air and smoke extraction control accessory, please consider the serial connecting capability of the fan's service switch (as per instructions). Higher connecting capability is available upon request. It is recommended to start the fan 20 seconds after starting the actuator for cover opening to ensure vertical exhaust of hot gases. For non-ducted appliances, a protective grid for the inlet is available as an accessory. When using inlet cone ESD-F, a short duct between the cone and MRH is required due to the cone's diameter. The maximum nominal power of the inserted fan is 37 kW.