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MRH Roof Fans

  • Vertical exhaust

  • Axial smoke and heat extract fan with motor inside air stream

  • Tested to F400 (400°C/2h) requirement according 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 (Notified Body 2797)

  • Thermal transmittance class T2

  • 24VDC electrically operated spindle actuator for cover opening

  • Indication for opened/closed cover position (floating limit switches)

  • Robust structure

  • Exhaust protective grid included

Protection

In the event of a fire, this innovative system comes to the rescue by swiftly extracting smoke and gases from the room. By providing smoke-free escape routes, it significantly enhances the chances of safely rescuing people during a fire emergency.

Durable

The unit’s robust and reliable build is facilitated through a combination of steel and aluminium, making it resistant to the most challenging of operational environments.

Efficiency

Each MRH unit is built around an AXC axial fan integrated inside the insulated housing to reduce heat losses from the buildings.

Construction

The hatch casing is made of ZM (ZnAlMg coated) steel while the hatch cover is made of AlMg3. The casing is made as a double metal layer with mineral wool insulation:

• base with 120mm

• cover with 150mm

Operation

The series is able to handle continuous temperatures of up to 55°C through regular use and 400°C for 120 minutes. The units are also compatible with the Systemair accessory range which includes an inlet cone, flexible connection, protective grid and more.

Motor

Motor inside of the air stream. The unit is built around a single-speed IE3 motor. The unit is also available in different motor types and sizes.

Motor protection

Motors are provided without PTC. The motor protection is provided by customer.

Control

Service switches of motor and actuator serially on the hatch casing. Electrical connection in the service switches. For speed control of single-speed motors use a combination of frequency inverter and appropriate filter to motor side (sine or du/dt), respectively observe instructions.

Installation

The MRH fans are suitable for flat roof outdoor installation.