In some situations, it is better to extract warm air from the top of an enclosure than via fans mounted inside the door panels.
When is it best to use roof exhaust units?
The main reason for choosing a roof exhaust fan is the density of equipment within the cabinet. When this is high, there is no room available for ventilation fans on the walls of the enclosure. Enclosure roof exhaust fans are commonly used in this instance as they do not take up any internal cabinet space to dissipate warm air extracted from the top of the enclosure.
Roof exhaust units are also a practical solution in situations where the sides of the cabinet are covered by obstacles, walls or by the sides of other cabinets.
In a perfect configuration, an exhaust filter is positioned at the bottom of the cabinet. The lower pressure generated by the roof unit sucks in air from the outside through the exhaust filter to enhance internal air flow and the dissipation of heat.
Roof exhaust units are available to buy online at Axair can be provided with an exhaust filter for either convection or forced air cooling in combination with a fan. Axair Online offers two series of units; the ‘T’ series and the ‘TP’ series.
Both the current all metal "T" series and the new "TP" series provide an efficient solution to improving internal airflow based on higher pressure backward curved centrifugal motorised impeller. These outperform standard axial fans of a similar size on filter pressure loss. Backward curved centrifugal fans have the advantage of providing strong sustainable air flow, even when the equipment density is impeding the airflow and door mounted filter units are becoming dirty.
The "TP" series provides the panel builder with a high performance and economical answer. It is constructed from high impact polycarbonate alloy with embossed finishing and aluminium top. This aluminium top helps better dissipate the heat generated by the motor and from within the cabinet.
• Available with or without fans depending on ventilation requirements
• Fitted with backward curved motorised impellers
• Can be fitted with fan filter for maximum efficiency
• Aluminium & plastic (ABS/PC) casing
• Permanent sealing gasket supplied
• IP23 or IP54 protection
• Available in RAL 7035
• Suitable for operation at 60Hz
• For warm extraction from the top of enclosures
• Fitter with backward curved motorised impellers
• Can be fitted with FPF for maximum efficiency
• Steel casing
• Adhesive sealing gasket supplied
• IP43 protection
• Available in RAL 7032 or RAL 7035
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