"The energy-saving hall heating saves our club 47 %."

The Grün-Weiss Mannheim e.V. tennis club relies on innovative heating technology and residual heat utilization in its halls - a smart decision that pays off for the successful traditional club.

The traditional Grün-Weiss Mannheim club is one of the largest tennis clubs in Baden. The club has two tennis halls of its own and thus offers continuous training opportunities for the players. However, heating the two halls from 1952/53 and 1972 was increasingly becoming a financial burden for the club. The central oil heating system consumed between 30,000 and 35,000 liters of heating oil per year. Technical director Dr. Peter Ruckh saw an urgent need for action.

"Saving costs was our top priority. At the same time, however, we wanted a system that we could control individually, that protects the environment and gives our players a pleasant feeling of warmth," says Dr. Ruckh.

Energy-saving, climate-friendly, ball-proof - the new heating solution

The tip to take a closer look at the energy-saving infrared heaters from KÜBLER came from a neighboring sports club. They had had good experiences with the efficiency, control and comfort of these systems. Grün-Weiss followed this recommendation. Tailored to the conditions at Grün-Weiss, the 1,400 square meter and 6.8 m high total area has since been heated by six energy-saving OPTIMA infrared heaters - painted green to match the overall appearance of the hall. The high-performance devices are mounted high up under the roof and tested for ball impact safety in accordance with DIN VDE 0710 Part 13/05.31. Unlike conventional warm air blowers, where warm air is blown into the room and largely dissipates as warm air under the hall roof, the heat is very pleasant and efficient thanks to the infrared principle.

Each indoor court can be heated individually

Thanks to an intelligent control system, heating temperatures and switching times can be regulated via an LCD display in the hall vestibule - individually for each hall space. This needs-based adjustment of the hall heating to the different times of use has made it possible to tap into further savings potential.

Residual heat utilization for that extra efficiency boost

The waste heat from the infrared heaters is used for hydraulic-based heat generation. Up to 15 % of additional energy is thus available to the club almost free of charge for hot water preparation. At Grün-Weiss, this is used to heat the hall vestibule and support the hot water supply in the toilets and washrooms.

High savings - fast amortization

The low-noise heating system ensures a pleasantly tempered and draught-free indoor climate. However, the most important advantage for the Grün-Weiss Mannheim club is the economic viability of the system. The energy-saving heating system, demand-based control and the use of residual heat mean that the club can save a total of 47 percent. Dr. Ruckh concludes. "These savings give us important financial freedom for the youth work in our club."