Kielce, 25.11.2002      

The Association for the Utilization     
of the Renewable Energy Resources     

re.:  the ground heat  exchangers

      The ground heat exchangers of the total output of 137,000m³ of air per hour have been operating in our company for 13 years. This entire period they have been working service- and failure- free. The savings in energy consumption for heating and air conditioning purposes which we had intended, have been fulfilled. After 11 years from putting in operation, we ordered an expertise on the ground heat exchangers from SANEPID (sanitary and epidemiological services) in Kielce. Their studies have proven the gravel beds being free from biological impurities.
      The above statement has been made upon request of  the The Association for the Utilization of the Renewable Energy Resources (Stowarzyszenie Odnawialnych Zródel Energii) in order to propagate the practical achievements in scope of ecology and ecological education in Poland.