MRH 1000

MRH roof hatch for smoke and heat extraction

• Vertical exhaust
• Tested to F400 (400°C/2h/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
• Certified as accessory of smoke and heat extract axial fans
• Insulation thickness: walls 120 mm, cover 150 mm
• Thermal transmittance class T2
• 24VDC electrically operated spindle actuator for cover opening
• Indication for opened/closed cover position (floating limit switches)
• Installation on flat or inclined roof - adjustable side bars to roof pitch (possibility to adjust depends on the height position of side bar - instructions)
• Installation on flat surface (e.g. concrete) or through the roof
• Robust structure
• Sucking side connection acc. Eurovent 1/2
• Exhaust protective grid is included

MRH, 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. MRH is intended for insertion of axial smoke and heat extract fan with motor inside air stream.

In serially available version the hatch is intended for emergency use only (without EMC protection).

Tested also to Re 10000 (cycles open -close), but for dual use additional safety elements are needed to reduce risk due to hatch closing.

For installation on the top of buildings up to snow load SL 1000 (SL 1250 at size 1250) and wind suction load WL 1500. The casing is made as a double metal layer with mineral wool insulation.The hatch casing is made of ZM (ZnAlMg coated) steel while the hatch cover of AlMg3. Service switches of motor and actuator serially on the hatch casing. Electrical connection in the service switches. When choosing AES exhaust air and smoke extraction control accessory, please observe serial connecting capability of the service switch of the fan (instructions). Higher connecting capability on request. Recommended start of the fan is 20s after starting actuator for cover opening, to ensure vertical exhaust of hot gases. For non-ducted appliance protective grid for inlet is available as accessory. Max. nominal power of inserted fan is 37 kW.