RVH Roof Unit
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Roof fans with the motor out of the air stream
Wolter roof fan units are suitable for mounting on different roof types. As the motor is out of the air stream, RVH series fans can be operated at temperatures of up to 120°C (80°C if speed-controlled motors are used, 50°C for sizes RVH 800 and above.)
Discharge and motor cowl are made of salt-water proof aluminium. The base plate with its integrated inlet cone is made of galvanised sheet steel.
The backward-curved impellers are made of aluminium and are balanced statically and dynamically according to G 6.3 of (DIN ISO 1940).
Standard IEC motor in frame type IMB5, protection class IP55, 1~23 0V/50Hz or 3~400V/50Hz, insulation class F. Motors of fans up to size 500 are suitable for transformer-type speed control.
The motor terminal box is easily accessible after removal of the fan cowl. The motor has to be connected according to the provided wiring diagram in accordance with locally applicable regulations.
All fans are delivered ready for installation and are packed in separate boxes or crates. We recommend the use of matching Wolter roof sockets. If other roof sockets are used, dimensions given in our catalogue should be followed to achieve proper sealing and avoid air-leakage.
Fan performance curves
The performance curves for these roof fans have been tested according to DIN 24 163. The curves indicate the static pressure increase .pst (static, free outlet) as a function of the volume flow. The reference air density is 1,2 kg/m³.
The sound data was measured according to DIN 45 635, part 38. The actual noise levels will vary, depending on system characteristics such as reflexion, resonant frequencies or structure-borne noise transfer.