Rosenberg Duct Fan Zero-Boxes

Rosenberg Duct Fan Zero-Boxes
Rosenberg Duct Fan Zero-Boxes
Brand: Rosenberg
Product Code: Zero-Boxes
Availability: In Stock
Price: 6,128.00€

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Casing is made of sendzimir galvanized sheet steel as sound absorbing construction. The inlayed 40mm thick rockwool plates (unit range Evolution), and the 5mm insulating foam (unit range Ultimate) have a sound attenuating effect. The covering lid can easily be unscrewed, to gain access for cleaning and maintenance. The motor is removable together with the impeller and spiral scroll.

The external rotor motors are in accordance with protection class IP44/54, with moisture protection impregnation, ball bearings and thermal overload contacts. The impellers are forward curved with double inlet (Evolution) and forward curved with single inlet (Ultimate). Both types of impellers are balanced dynamically and statically in accordance to quality level G 2.5 to DIN 1940 on two levels.

Electrical connection
The electrical connection can be made via an IP44 / IP54 terminal box.

Rigid folded spiral-seam ducts (Spiro), flexible aluminium or plastic ducts with standardized diameter can be used. Zeroboxes can be installed in any positions. If the Zerobox is used for several floor levels, the local laws on fire protection have to be observed.

Air performance curves
The performance curves for these fan types have been measured in mounting position D (installed on the pressure side and open on the suction side) and show the total pressure increase pt as a function of the air flow. The dynamic pressure pd2 refers to the flange cross section at the outlet side of the fan.

Noise levels
The bordered values printed in the performance curve diagrams show the „A“ weighted LWA5 sound power level at the inlet side in duct systems. The relative octave sound power level LWArel at octave medium frequency you can find on the table on each fan type page.

• extremely flat construction
• low noise
• can be installed in any position
• high pressure and volume output
• easy cleaning and maintenance
• easy electrical connection via IP44 terminal box
• motor protection by thermal contacts
• speed is 100% infinitely variable using auto transformers or electronic control

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