CASE STUDY FROM ROMANIA PORSCHE Bucharest West 2 – Showroom and Service Workshop Member of EGEC The Geothermal Heat Pump Market in Central and Eastern Europe - Bratislava November 2007 Arch. Alex APOSTEANU –President Dr. Eng. Radu POLIZU – RGS Vice President Eng. Doina CUCUETEANU – Quality System Manager

PBW2 – GENERAL DATA Country / CityROMANIA - Bucharest Country / CityROMANIA - Bucharest ClientPORSCHE Romania SRL ClientPORSCHE Romania SRL Construction typeAUDI and SEAT Showroom and service workshop Construction typeAUDI and SEAT Showroom and service workshop Commissioning date August Commissioning date August HVAC systemHeating, ventilation, air conditioning (cooling) and domestic hot water production provided by heat pumps connected to vertical ground heat exchanger HVAC systemHeating, ventilation, air conditioning (cooling) and domestic hot water production provided by heat pumps connected to vertical ground heat exchanger Heat pumpsFlorida Heat Pump – 17 pcs. Water-to-Water & 12 pcs. Water-to-Air, with R410A ecological refrigerant and electric powered compressors Heat pumpsFlorida Heat Pump – 17 pcs. Water-to-Water & 12 pcs. Water-to-Air, with R410A ecological refrigerant and electric powered compressors Operation modeReversible, heating and cooling Operation modeReversible, heating and cooling Energy source100% geothermal Energy source100% geothermal Additional classic fuelNO Additional classic fuelNO EntrepreneurASA Holding SA EntrepreneurASA Holding SA DescriptionSurface m² DescriptionSurface m² Heating load kWt Ccooling load kWt Fresh air flow m³/h Ventilation & domestic hot water load kWht/day Geothermal Heat Pump Market in Central and Eastern Europe - Bratislava November 2007

PBW2 - CONSTRUCTION DATA Metallic construction - total unfolded area of m², structured in four distinctive parts: Metallic construction - total unfolded area of m², structured in four distinctive parts: SEAT showroom of 360 m², made of steel and glassSEAT showroom of 360 m², made of steel and glass AUDI showroom of 795 m² (650 m² area of car presentation; 145 m² - office area, on two levels)AUDI showroom of 795 m² (650 m² area of car presentation; 145 m² - office area, on two levels) Middle section of metal and glass of 421 m² (links the two showrooms)Middle section of metal and glass of 421 m² (links the two showrooms) Workshop of 1931 m², with thermally insulated lateral wallsWorkshop of 1931 m², with thermally insulated lateral walls Medium thermal resistance of the building: 2,13 (m 2 K)/W Medium thermal resistance of the building: 2,13 (m 2 K)/W Specific thermal loss: 0,209 W/(m 3 K) Specific thermal loss: 0,209 W/(m 3 K)

PBW2 - CALCULATION DATA (Bucharest area) WINTER outdoor air temperature-15°C outdoor air temperature-15°C outdoor air relative humidity 80% outdoor air relative humidity 80% indoor air temperature for public areas, indoor air temperature for public areas, showrooms, offices and sanitary facilities 20°C showrooms, offices and sanitary facilities 20°C indoor air temperature for production areas 18°C indoor air temperature for production areas 18°CSUMMER outdoor air temperature 34,5°C outdoor air temperature 34,5°C outdoor air relative humidity 11,95% outdoor air relative humidity 11,95% insurance degree 98% insurance degree 98% indoor air temperature for public spaces, indoor air temperature for public spaces, showrooms, offices and sanitary facilities 26°C showrooms, offices and sanitary facilities 26°C indoor air temperature in production spaces indoor air temperature in production spaces and in the warehouse 27°C and in the warehouse 27°C Geothermal Heat Pump Market in Central and Eastern Europe - Bratislava November 2007

PBW2 – HVAC TEHNICAL DATA Heat pumps: 17 pcs. water-to-water and 12 water-to-air Heat pumps: 17 pcs. water-to-water and 12 water-to-air 750 m 2 of special surfaces of under-floor piping system for heating and cooling 750 m 2 of special surfaces of under-floor piping system for heating and cooling Ventilation channels - some visible, some hidden - connected to several water-to-air heat pumps, located mainly in the false ceilings of the building Ventilation channels - some visible, some hidden - connected to several water-to-air heat pumps, located mainly in the false ceilings of the building Ground source heat exchanger vertical boreholes of 70 – 75 m depth each were installed on a m 2 field in order to ensure a total 475 MWh for heating (and hot water), and 393 MWh for cooling Ground source heat exchanger vertical boreholes of 70 – 75 m depth each were installed on a m 2 field in order to ensure a total 475 MWh for heating (and hot water), and 393 MWh for cooling For the time period under survey, the coefficient of performance of the HVAC system was higher than COP=4,8. For the time period under survey, the coefficient of performance of the HVAC system was higher than COP=4,8. Geothermal Heat Pump Market in Central and Eastern Europe - Bratislava November 2007

PBW1 - PBW2 SURVEY (WINTER SEASON 2006/2007) PBW1 is another Porsche facility for SKODA and VOLKSWAGEN cars with classic HVAC system and 5231 m 2 (similar construction in very close area, with identic solar orientation, same functions, commissioned in January 2006). PBW1 is another Porsche facility for SKODA and VOLKSWAGEN cars with classic HVAC system and 5231 m 2 (similar construction in very close area, with identic solar orientation, same functions, commissioned in January 2006). PBW1 use natural gas for heat and hot water, and last generation Air–to-Air VRV (Variable Refrigerant Volume) multisplit systems for ventilating and air conditioning during winter and summer. PBW1 use natural gas for heat and hot water, and last generation Air–to-Air VRV (Variable Refrigerant Volume) multisplit systems for ventilating and air conditioning during winter and summer. After commissioning of PBW2, ASA asked to Romanian Geoexchange Society – Mr. Radu Polizu – authorized auditor, member of ASHRAE to initiate a 12 months survey in PBW2. The existence of PBW1 and PBW2 allowed a simultaneous survey of the 2 systems. After commissioning of PBW2, ASA asked to Romanian Geoexchange Society – Mr. Radu Polizu – authorized auditor, member of ASHRAE to initiate a 12 months survey in PBW2. The existence of PBW1 and PBW2 allowed a simultaneous survey of the 2 systems. The survey was based on real consumptions (invoices) for natural gas (PBW1) and electric energy (PBW1 and PBW2). The survey was based on real consumptions (invoices) for natural gas (PBW1) and electric energy (PBW1 and PBW2). The presented results refers at the two systems during the cold season between October 2006 and April The presented results refers at the two systems during the cold season between October 2006 and April At the end of November Mr. Radu Polizu will publish the survey results for 12 months (October 2006 – September 2007). At the end of November Mr. Radu Polizu will publish the survey results for 12 months (October 2006 – September 2007). Geothermal Heat Pump Market in Central and Eastern Europe - Bratislava November 2007

SURVEY CONCLUSIONS (WINTER SEASON 2006/2007) If properly designed, implemented and used, the GSHP HVAC system brings important economical and ecological advantages, compared to the classic HVAC solution If properly designed, implemented and used, the GSHP HVAC system brings important economical and ecological advantages, compared to the classic HVAC solution The consumption of resources for heating, ventilation and hot water in winter season in a GSHP HVAC system is 5 times smaller than in a technically equivalent classic system The consumption of resources for heating, ventilation and hot water in winter season in a GSHP HVAC system is 5 times smaller than in a technically equivalent classic system The CO 2 pollution in GSHP HVAC system is 10 times smaller than in classic system with natural gas The CO 2 pollution in GSHP HVAC system is 10 times smaller than in classic system with natural gas The expenses for the cold season of the year in GSHP HVAC system are 3 times smaller than in classic system (the situation will become even more favorable for GSHP systems in the near future due to the predictable increase of the natural gas price) The expenses for the cold season of the year in GSHP HVAC system are 3 times smaller than in classic system (the situation will become even more favorable for GSHP systems in the near future due to the predictable increase of the natural gas price) Geothermal Heat Pump Market in Central and Eastern Europe - Bratislava November 2007

THANK YOU FOR YOUR ATTENTION! ASA Holding SA Romania – Bucharest , Kiseleff Avenue Tel Web: Contact: Arch. Alex APOSTEANU – President Dr. Eng. Radu POLIZU – RGS Vice President Eng. Doina CUCUETEANU – Quality System Manager