Heating and cooling. of residential, commercial and industrial properties with close-to-surface, climate-friendly geothermal energy

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1 green, efficient, anywhere Heating and cooling of residential, commercial and industrial properties with close-to-surface, climate-friendly geothermal energy Geothermal energy from geokoax for cost-effective, efficient interior climate management even in areas with drilling depth restrictions

2 Geothermal Energy Innovative Heat Exchanger Technology is the future The next generation of energy production Why use geothermal energy? Unlike conventional The patented geokoax heat exchanger technol- energy, geothermal energy does not need to be ogy enables the use of close-to-surface geother- generated at high cost and with high CO2 emis- mal energy with drilling depths as low as 17ft / sions it already exists, free and inexhaustible. It 5m. This not only reduces investment costs signif- is an essential component for achieving public policy icantly, but also allows planners and developers climate goals. If fossil fuels are used, legal require- to adhere to official drilling depth limits. summer cooling winter heating ments for new construction and retrofitting of buildings can only be met through higher invest- inexhaustible energy from the earth, for thegeothermal earth energy is therefore the future of ments. The technological advantage: geokoax achieves up to 65% more power in RT per probe meter. We can help when conventional probe systems heating and cooling. fail, for example, when facing unexpected geogas heating inexhaustible energy CHP from the earth, for the earth 0 A+ 25 A 50 B district Fernwärme heating 75 C 100 logical challenges (e.g. aquifers). geokoax sys- wood pellet heating D 125 E 150 F G 225 H > 250 tems work in difficult environments. Our probes are exceptionally powerful and make geothermal energy possible almost anywhere. Your advantages of our technology up to 70% lower operating costs rapid amortization highest energy efficiency labels reliable planning close-to-surface, safe sustainable and environment-friendly Geothermal energy is available free of charge. By using geokoax probes, the running phases of the heat pump are minimized which guarantees you a high-performance climate management system with up to 70% lower operating costs. Up to 65% lower drilling depths compared with single probe systems (and up to 60% compared with double U-bendsystems), extensive incentives in most countries (tax credit, subsidies or equivalent) along with minimal operating costs allow for a rapid return on investment. A geokoax geothermal system significantly increases the value of your property. Heat pumps and heat pump systems are the only heating / cooling systems that will consistently achieve the highest green label classes A+ to A+++ of the EU Energy Label mandatory by September These Energy Labels are the most stringent worldwide. Geothermal energy is now possible anywhere: Due to the low drilling depths required, geokoax can be deployed in sensitive areas with drilling depth restrictions, as well as on smaller properties such as urban areas with high energy requirements reliably and predictably. Risk-free and non-polluting geothermal energy: We eliminate concerns about possible breaches of aquifers and protect the groundwater in geologically sensitive areas.. Geothermal energy is the most environment-friendly form of heating and cooling. With the use of bioelectricity, operation of a ground source heat pump can even be CO2-free. In addition, geokoax uses organic heat transfer fluids from renewable resources (non-edible corn) with additives approved food use.

3 geokoax geokoax The innovation in geothermal energy Technical advantages Geothermal energy a reliable form of energy Reliable mono valence for heating and cooling geokoax supplies the foundation as domestic hot water. source to cover the base heating for a monovalent heating and cool- and cooling requirements of a build- Low borehole resistance The concentric orientation of the geokoax coaxial tube ensures a uniform distance from the soil and thus a better energy transmission compared with conventional probes. The significantly lower borehole resistance results in an energy absorption that is at least more than twice as high. Contact surface area The geometric concept of the geokoax system means that the contact surface area for geothermal heat is twice as large as that of conventional geothermal probes. As a result of the smooth coating, the space between the probe and the soil is even. This ensures a homogeneous filling of the annular space without any air pockets. ing system: based on the high-per- As an alternative, geokoax can of ing, the geokoax system can sub- formance heat exchanger tech- course also be used to supplement stantially reduce the demand from nology, the heat pump supplies existing heating and cooling systems other heating and cooling sources heating and cooling energy as well on a multivalent basis. As a such as a gas boilers and chillers. Complete geothermal solutions from a single source With our network of professionals and a highly qualified team, we offer you complete solutions related to our heat pump as well as the peripheral components based on the heating and cooling requirements of each ment foundation wall and subject to quality assurance testing. In addition, we offer a geothermal monitoring patented technology for your project. building. Each geokoax system is system (profitable from around accurately simulated and individually 80kW) for the adjustment and constant During the planning and design phase, we use aggregated test results from comparable geokoax customized. Our experienced, certified partner companies are tasked with the drilling, installation optimization of your system in close coordination with the heating installer or contractor of your choice systems, supported by expert and the filling of the probes and knowledge and professional project management. Thus, we ensure the backfilling and compressing compaction of the borehole field. All Thus, geokoax makes geothermal energy reliable and exceptionally No frost protection requirements The geokoax probe fields are designed to operate in the positive temperature range. Therefore, it is possible to dispense with the usual high concentration of anti-freeze in favour of a higher viscosity and thermal conductivity. The well-known problem of conventional probes with freeze-thaw cycles of the backfilling is thus eliminated. Turbulence The core of the geokoax heat exchanger technology is passive turbulence. The continuous change from laminar flows to turbulent flows increases the heat transfer coefficient by 20% in the case of a 9ft 10in / 3m probe and by up to 100% in the case of a 32ft 9in / 10m probe. (Source: RWTH (Rheinisch Westphalian Technical University) Aachen). Volume The geokoax heat exchanger system features 13 times as much carrier fluid volume as a single U-bend system. The coaxial tube serves to store heat. This permits a precise release of the required energy at a constant temperature and also longer resting periods of the heat pump. an optimal technical design of the external installation work is carried cost-effective. geothermal heat source and the out up to the inner side of the base-

4 Construction of a new residential and commercial development with climate protection features 67 condominiums and commercial units in an area with drilling depth restrictions (190 kw, 54 RT)) Troisdorf, Germany The inner-city housing development completed in 2014 has been recognized by the Energy Agency of North-Rhine-Westphalia (a large state in Germany) as "climate protection development" and received state funding. With drilling depth restriction of 31m and a limited plot size, geokoax was the only probe system with a guaranteed required heat output of 190 kw (54 RT). The use of geokoax geothermal probes allowed for a reduction of the drilling depth by 35% compared to the original design with duplex probes. This led to a saving of 4,920 of feet drilled (Source: tewag GmbH), and around 25% of drilling costs. Upgrade of an apartment block in an area with drilling depth restrictions (100 kw, 28,5 RT) As part of the complete retrofitting of the apartment block dating from the 1960 s, the existing oil heating was replaced with a geothermal heating system. It fully meets heating requirements of 100 kw (28,5 RT). The redevelopment plan initially focused on duplex probes. Since the area lies in a water protection zone with a drilling depth restriction of 128ft / 39m, the system had to be changed: The required heat output could only be guaranteed with geokoax probes with a reduction of 47% in drilling length and 36% lower investment costs. The conversion to geothermal energy has resulted in annual savings of 69% in terms of CO 2 emissions and 73% in terms of operating costs. The system generated a positive return on investment after just 5 years! Lübeck, Germany geokoax other reference projects Low-energy family home, Vaihingen Historic landmark building, Cologne Probe field below building, St. Augustin, 88 kw at drilling depth restriction of 23 m Industrial project with passive cooling, Salching Hospital project, system change, Rheine 2 large projects in NL, Urmond and Dekkerswald Points heating, Farchant/Zugspitze New office building in area with drilling depth restriction (14 kw), Kamp-Lintfort Residential develpoment with drilling depth restriction, Kirchseeon Hospital Düren, 243 kw in area with drilling depth restriction, Rhine area Drinking water protection area Chiemsee, first geothermal system on the island Fraueninsel Residential development with 24 houses of 8 kw, Hattingen

5 We are happy to tell you more about our reference projects. Our team of experts draws on experience gained from over 1,000 projects installed in Germany, Austria, Switzerland, the Netherlands, Serbia, Denmark and the Czech Republic. Whether the project is a new building or energy-efficient retrofitting of existing buildings: we work hand in hand with your MEP Planning Engineer and your heating installer to provide you with predictable, reliable and highly efficient geothermal energy from geokoax. Please get in touch with us! We look forward to talking with you: geokoax GmbH North America Mark Metzner Phone: (604) mark.metzner@geokoax.com GeoKOAX is partnering with Clemson University, South Carolina, for continued research and development of coaxial geothermal systems. The collaboration extends to the Departments of Mechanical Engineering, Materials Science and Engineering and the School of Architecture. The research focuses on technical analysis of system performance, design for manufacturing, and optimization. Energy efficiency, long term durability, and environmental impact are evaluated through heat transfer numerical modeling and laboratory and full-scale experimental testing.