How to find the right product for any location and any temperature.

Analyse your operating conditions to make the right choice.

The most suitable thermal management solution depends on the particular ambient conditions – and to a major degree the prevailing temperature. Is it consistently lower than that required in the electrical enclosure? Is it higher? Is the air contaminated? Would water cooling instead of air cooling be more appropriate? Whatever the answer, we have the right product.

Low ambient temperature?

If the ambient temperature is always lower than the temperature needed in the electrical enclosure, filterfans will provide economic cooling. If the air is heavily contaminated with dust or fluids, air/air heat exchangers are the recommended choice.

Cooling with filterfans.

A filterfan sends cool, filtered ambient air into the interior of the electrical enclosure. At the same time, it increases the pressure slightly, which prevents dust from infiltrating into the enclosure. Fitting a filterfan to the lower third of the electrical enclosure and placing the exhaust filter as high as possible also aids natural air convection processes and avoids the build-up of heat pockets.

Cooling with active cooling units.

An active cooling unit takes in air from inside the electrical enclosure and lowers its temperature to a suitable level, in order to guarantee a defined temperature in the electrical enclosure. The lowest temperature inside the cabinet is not necessarily the best. Our units are preset to 35 °C, which achieves a good balance between useful lifetime and condensate build up. It is essential to have good air intake and air exhaust features in the cooling unit's external air circuit to ensure proper heat energy dispersal into the environment.

High ambient temperature?

If the ambient temperature is consistently high or higher than the temperature needed in the electrical enclosure, active cooling units are used. If the ambient air is heavily contaminated with oil/dust or there is a hostile/humid environment – air/water heat exchangers are recommended.

Cooling with air/water heat exchangers.

An air/water heat exchanger works without servicing and independently of ambient air quality. Suitable areas for use include extremely high ambient temperatures (>55 °C) and in oily, dusty, humid and aggressive ambient air (IP protection system up to IP 65). Since it uses water to dissipate thermal losses, it is also suitable for use in air-conditioned manufacturing areas in which additional heating is not allowed.

Increase performance with our complete solutions.

Unsurpassed efficiency: product combination.

System solutions combine the power of different products and optimise the efficiency, environmental performance and safety by consistently providing the required refrigerant in the required temperature, or by even after switching off the unit, preventing condensation in the control cabinet.

Filterfans and thermostats.

The interaction of filterfans and thermostats leads to a significant energy-, material- and time savings. The thermostat controls the operation of the filterfan, which reduces the energy consumption and extends significantly the lifetime of the fan. This results in a reduced consumption of filter mats and decreased time for cleaning. Improved environmental performances, lower costs and more reliability for your production process are the bottom line.

Air/water heat exchangers.

The combination of an air/water heat exchanger and a chiller guarantees a safe and silent cooling system, along with being able to operate regardless of the quality of the ambient air at the installation site. The closed pipeline system ensures that all cooling tasks to control panel, system, or machine can be solved easily and economically. 

Thermostats, hygrostats and heaters.

Electrical enclosure heaters in combination with thermostats and hygrostats ensure that the correct temperature is always available. In addition to savings on energy and a better environmental balance, the combination of heaters with thermostats and hygrostats offer greater reliability of the production process.

Reliable data directly on the screen.

Planners and designers need security when configuring an optimal air conditioning and signaling solutions. With the Pfannenberg Sizing Software (PSS) we offer you a free and user friendliness instrument, which immediately provides a qualified device recommendation. You can avoid costly over-sizing as well as dangerous under-dimensioning already in the planning phase or review the dimensioning.

Often, individual circumstances make it difficult choosing the right solution. The PSS contains an open library, in which custom specific components can be easily maintained. In this way, we ensure that we can cover the complete spectrum of possible applications and solutions for each application in the field of thermal management, re-cooling and signaling.

The PSS is online and as download available at:

Selection of the preferred thermal management method, based on environmental conditions.