Energy efficient ventilation of sports halls

Fan Wheels and Assembly Service


European manufacturer of climate control solutions


  • Delivery of complete fan units for sports halls (project business)
  • Increase in energy efficiency
  • Fixed available space
  • Fixed project schedule (3 months start to finish)
  • No price increase


  • Design of customer-specific ventilation system
  • Switch from forward to backward curved wheels
  • Delivery of fan wheel, inlet cone, laser-welded, powder-coated housing


  • 26% efficiency increase
  • – 3 dB sound pressure
  • 26% less power consumption
  • Newly designed ventilation system consisting of two fan units
  • Delivery of 200 pcs. within 3 months

Project overview

This European developer and manufacturer of technologically superior heating, hot water and climate control solutions, approached punker with the task of developing and delivering a new and optimized fan unit for an existing hall ventilation system within a timeframe of only three month. The punker solution included a switch from forward- to backward-curved fan wheels, a customized, laser-welded housing and supplying complete fan units that deliver a significant increase in energy efficiency and a substantial decrease in sound pressure.

Hallenbelüftung punker

Our Client

Our customer is one of the leading international companies for heating and indoor climate solutions. With its broad product range, they cover pellet boilers, heat pumps and solar systems and offer a comprehensive range of gas and oil condensing boilers as well as solutions for controlled domestic ventilation, in the field of indoor climate systems and heat recovery. The group of companies has 2,000 employees worldwide.


The client approached punker with this time-sensitive project in July 2018.

For an existing hall ventilation system, a ventilation solution with a new operating point was sought, which was to be delivered in a quantity of 200 units within a fixed time window of only 3 months. In the existing system, two blowers with forward-curved fan wheels of the punker Fclassic series and housings manufactured by the customer were used. What was needed was a wheel solution with motor asynchronous speed for the required air performance while at the same time increasing energy efficiency. The general conditions also included the limited space available due to the existing plant design and the requirement that the manufacturing costs of the plant should not be negatively affected.


The aerodynamical project requirements and the available constructive installation space were discussed together with the punker application engineers and a solution was developed on the basis of the large characteristic curve data base of the punker company. The required operating point could not be reached with the forward curved fan wheels used up to that point. punker’s application engineers developed an alternative solution based on backward curved wheels, taking into account the available installation space and the given motor asynchronous speeds, including a housing. The use of laser welding technology allows punker to provide the customer with complete blower units quickly and at no additional cost to the customer. The final analysis of the newly developed blower units on the chamber test stand in punker’s laboratory showed an increase in system efficiency of 26%, and a reduction in noise emission of 3 dB.



Fan wheels for hall ventilation

The General HVAC fan wheels from punker are particularly suitable for plug fans and plenum fans used in unhoused applications such as air handling units. The fan wheels of the General HVAC Line are designed for high energy efficiency, low noise emission, low weight and optimal use of the available space and offer with a good price-performance ratio.

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punker General HVAC Lüfterräder

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Assembly Service

With its assembly and manufacturing service, punker actively supports machine and plant manufacturers who want to use aerodynamically sophisticated and high-quality blowers in their plants. Provide us with individual components or entrust us with the complete procurement of all components and assembly - we will find an individual solution for your needs.

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