1. Application examples of shallow geothermal energy 1 STÜWA – Konrad Stükerjürgen GmbH Presentation of successfull heating and cooling systems of the company STÜWA Ljubljana – 12.05.2015

2. About us- STÜWA More then 125 years of experience in well drilling Own PVC-, PE- and steelproduction for well and geothermal construction material Subsidiary Rausch & Rausch in Austria and Stüwa Zwenkau STÜWA – Konrad Stükerjürgen GmbH2

3. Our history 3 Establishment well drilling company start of own PVC casings and screens production 1883 1955 1992 1999 Foundation of branch factory in Zwenkau start of own steel casings and screens production 2011 Opening of subsidiary Rausch & Rausch in Austria

4. Our philosophy 4STÜWA – Konrad Stükerjürgen GmbH STÜWA Optimal solutionfinding Safeness and longlevity of products Environment protection Motivation to constant improvements Operating efficiency Customer satisfaction Innovation

5. Our products PVC – Casings, screen and accessoires Steel – Casings, Wire wrapped screens, bridge slotted screens and accessoires PE Casings ans screens Riser Pipes Well heads Drilling fluids 5STÜWA – Konrad Stükerjürgen GmbH

6. Geothermal products Geothermal probes U-shape STÜWA GeoHeat® Geothermal probe coaxial STÜWA GeoThex GHX- NEW Distributors/Collectors Distributor shafts Antifreeze fluids STÜWASOL L and N Installation aids Electrofusion couplings 6

7. Research and Development Innovation is an important part of our philosophy Constant improvement of exiting products to guarantee safeness and longevity New products developments to meet increasing demands of water supply, well drilling and geothermal energy – e.g. Stüwa Vee Shape – e.g. Stüwa GeoHeat® – e.g. Stüwa Geoheat GHX STÜWA – Konrad Stükerjürgen GmbH7

8. Environment protection Our environment is very close to our hearts and is part of our philosophy We try to set a good example and have realised several projects on our premises to protect the environment 2 sewage plants (wastewater offices/ social area) 6 wells (cooling water/ fire fighting water / drinking water) 4 geothermal plants (heating / cooling / storage) 2 geothermal research projects (Photovoltaics / geothermal = asphalt tempering) 1 recycling of PVC chips 1 water treatment pickling plant 8STÜWA – Konrad Stükerjürgen GmbH

9. Overview geothermal plants Productionhall plastics: - 500m deep wells (for heating) - 3 x approx. 300m horizontal drilling (storage waste heat/heating/cooling) Productionhall steel: - 7 x 175m horizontal drilling (for heating) Dispatch hall: - 4 x geothermal spiral probe á 6m - for heating of the offices and cooling of the photovoltaic plant Research projects: - 3 x 150m probes for asphalt heating dispatch hall/ truck gateway - 3 x 150m probes for asphalt heating car parking - 2 x stainless steel probes for test purposes in 15m depth 9STÜWA – Konrad Stükerjürgen GmbH

10. Quality management TÜV Nord Certificate 100% Incoming goods inspection 100% Outgoing goods inspection Pressure tests Tensile strength tests 10STÜWA – Konrad Stükerjürgen GmbH

11. Application examples of shollow geothermal energy - References - STÜWA – Konrad Stükerjürgen GmbH11

12. References STÜWA Volksbank Gütersloh (bank)  14 x 70 meters of perforation (in total 980 meters of perforation) – 70kW heating capicity, 90kW cooling capicity

13. References STÜWA Town Hall Verl  15 x 100 meters of perforation (in total 1500 meters of perforation) – 85kW heating capicity

14. References STÜWA Tönnies – administrative building  35 x 200 meters of perforation (in total 7000 meters of perforation) - 360kW heating capicity, 320kW cooling capicity

15. References STÜWA European Parleament Luxembourg  233 x 102 meters of perforation (in total 23766 meters of perforation) - 2.300 MWh/a cooling capicity

16. References STÜWA Local Court Mettmann  39 x 100 meters of perforation (in total 3900 meters of perforation)

17. References STÜWA Administrative building ZEG Cologne  48 x 75 meters of perforation (in total 3600 meters of perforation)

18. References STÜWA German Parliament in Berlin  Water-water system  Heat storage  Cold storage 18 STÜWA – Konrad Stükerjürgen GmbH

19. References STÜWA Hilti Plant Thüringen in Austria Year : 2009 Project information : supply of well equipment material:  Extraction Well: stainless steel casings and bridge slotted screens DN 900

20. References STÜWA Clinical Center Altötting, Bavaria, Germany Year : 2013 Project information : supply of well equipment material:  Extraction Well: PVC casings and VEE SHAPE screens DN 300  Infiltration Well: PVC casings and VEE SHAPE screens DN 300

21. References STÜWA Faculty Innsbruck, Austria Year : 2013 Project information : supply of well equipment material:  Extraction Well: stainless steel casings and bridge slotted screens DN 800  Infiltration Well: PVC casings and screens DN 600

22. References STÜWA Company Egger St. Johann in Tirol, Austria -Chip tray manufacturer Year : 2012 Project information : supply of well equipment material:  Extraction Well: stainless steel casings and bridge slotted screens DN 500  Infiltration Well: stainless steel casings and bridge slotted screens DN 500

23. Many thanks for your attention! 23 STÜWA – Konrad Stükerjürgen GmbH

24. Contact details STÜWA – Konrad Stükerjürgen GmbH Hemmersweg 80 D – 33397 Rietberg Tel. +49 5244 407 0 Mobile: + 49 175 516 1003 FAX +49 5244 16 70 web: www.stuewa.dewww.stuewa.de Christian Friess Field Worker Slovenia 24