2. Greeting Message Our company, Durim Co.Ltd will always think of health, environment, and happiness, contribute to the green-growth by supplying a masterpiece, "Durim copper heat conductivity plate" as an Eco-friendly product, finally, we will contribute to form the beautiful society by upgrading the quality of life. We would always do our best to supply the best quality of product constantly, and always consider customers first. Thinking of Health ! Thinking of Environment ! Thinking of Happiness ! Durim Co.Ltd Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 02

3. Overview and History April, 1985. Establishment of Durim February 1998. Development of aluminum thermal conduction plate for construction April, 1998. Durim was aired on "KBS ONE dollar site at KBS 9pm News. September, 2006. Patent Registration of Aluminum thermal Conduction plate for Ondol (Korean underfloor heating system). December, 2006. Establishment of Factory for Heatsink for Ondol in Ansan city February, 2007. Installation of the first production equipment of Heatsink for Ondol. August, 2007. Installation of the second production equipment of copper plating heatsink for Ondol March, 2008. Patent Registration of copper plating heatsink for Ondol. Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 03

4. PRODUCT CONTENTS DURIM CO.,LTD. 04 1. Introduction of Product 2.Overview of Product 3.Effect of Installation 4.Construction way 5.Evaluation about test and result 6.References 7.Press releases 8.Application cases of cooper heatsink 9.Yearly sales status 10.Track records

5. Copper heatsink ( Copper Heat Conductivity Plate ) 1. Introduction Copper Heatsink 1. Decrease more than 20% of heating bills owing to high heat conductivity 2. Copper heatsink has an effect on blocking 98~99% of harmful electromagnetic waves. (The test result by Korea Research Institute of Standard and Science) 3. Copper Heatsink has the same water vein blocking effect with one of copper plate of 99% purity. The test result by Korea Shape Energy Research Institute ) 4.Crack prevention effect (The test result by Hyundai Institute of Construction Technology) After laying copper heatsink having 140 times faster in heat conductivity than that of existing mortar, as a result of temperature deviation test of floor, the floor temperature was lowered around 3~7 degrees, and then the heat valley shape was removed so that the heating amenity was improved. DURIM CO.,LTD. 05

6. Copper heatsink ( Copper Heat Conductivity Plate ) 2. Overview DURIM CO.,LTD. 06 Product Copper heatsink Effect 1. reduction of more than 20% of heating cost. 2. Blocking effect of hazardous electromagnetic waves. 3. crack prevention. Composit ion 1. Dimensions : 0.30mm Х 320mm Х 78.4M ROLL ( Plate 25 standard ) 0.30mm Х 640mm Х 78.4M ROLL ( Plate 50 standard ) 2. Ingredients Highly porous copper-plated heat conductivity plate of aluminum treated with soft nitriding. (Aluminium Coppered Perforated Plate) Construct ion way After installing hot water pipe for heating on aerated concrete, widely unfold and lay copper plating heatsink to be contacted with upper part of pipe, and place cement mortar or remital on it.

7. 3. Installation Effect * Saving heating cost of 20% with the heat storage on wide area Copper plating heatsink transfers heating evenly and quickly, and maintains stable thermal environment by heat storage in wide area of the whole mortar layers between heating pipes, so, it can reduce heating cost up to 20%. (Hyundai Institute of Construction Technology) Especially, in case of using marble or wooden finishing materials, it complement the weakness of material having poor function to be heated by copper plating heatsink as well as maximizes the strength of excellent function of heat storage * Blocking Effect of water vein and hazardous electromagnetic waves Copper plating heatsink provides comfortable living space and healthy life thanks to the blocking effect of water vein and hazardous electromagnetic waves Copper plating heatsink has the same blocking effect of water vein with one of copper plate of 99.9% purity. (The test result by Korea Research Institute of Shape Energy ) Copper plating heatsink has the blocking effect of hazardous electromagnetic waves up to 98~99%. (The test result by Korean EMC research institute) DURIM CO.,LTD. 07 Copper heatsink ( Copper Heat Conductivity Plate )

8. 4. Construction way. Before laying copper plating heatsink/ after laying only X-L pipe. Under laying copper plating heatsink (unfolding rolled heatsink and lay it on pipes evenly). Fixing up copper plating heatsink. tightening it firmly using U-clip). Completion of laying of copper plating heatsink (restoring bended part) plastering of remital (mortar)..the figure after the completion of plastering of remital DURIM CO.,LTD. 08 Copper heatsink ( Copper Heat Conductivity Plate )

9. 5. The test result (1) Title of research Comparative evaluation of Ondol performance according to the installation of Copper plating heatsink (2) Goal of research the goal is to examine and evaluate the applicability of copper plating heatsink having high thermal conductivity to apartment buildings * Experiment for each 1 household with 100 Division Anti-crack admixture Laying of metal lath Laying of copper heatsink Remar ks Generation of more than 0.8mm crack to be repaired Generation of 13.5 m Generation of 4.6m None Generation of hairline cracks having no need to be repaired Generation of 31.8m Generation of 17.5m Generation of 10.6m Degree of crack prevention 100%200%400% Crack Repair Cost 50 thousands won/ household 30 thousands won/household 0 won /household * Tensile strength test Test areaCurrent situation Laying of heatsink Remarks Mortar floor0kg/mm 2 9~12kg/mm 2 Tensile strength of mortar floor was improved (In case of no inserting copper plating heatsink) (In case of inserting copper plating heatsink) * Refer to the test result by Hyundai Institute of Construction Technology DURIM CO.,LTD. 09 * Refer to the test result by Hyundai Institute of Construction Technology Copper heatsink ( Copper Heat Conductivity Plate )

10. 5. The test result Items UnitNormal construction Laying of heatsink Effect and performance Heat-conductivity w/m 1.6222 140 times of heating- conductivity Heating temperature(26.6 ) Minutes20 minutes5 minutes4 times faster Comparison of temperature rise 3 minutes 24.3 26.4 2.1 gaps 5 minutes 24.3 26.6 2.3 gaps 10 minutes 24.8 27.3 2.5 gaps 20 minutes 26.7 29.2 2.5 gaps * Heating efficiency review Division Setting up room temperature Source of supply Of the heating water Heating hours Required Heating amount (kcal) Saved heating amount (kcal) Saved cost in the heating amount Existing construction way Set on 45 Water circulation tank Continuous heating for 8hours 38,12000% Laying of Copper heatsink Set on 45 Water circulation tank Continuous heating for 8 hours 30,2667,834 Be saved by 20% * Heating amount review Refer to the test result by Hyundai Institute of Construction Technology DURIM CO.,LTD. 10 Refer to the test result by Hyundai Institute of Construction Technology Copper heatsink ( Copper Heat Conductivity Plate )

11. * Comparison of far-infrared photos No I N S E R T I O n INSERTIOnINSERTIOn After 3 mins After 5 mins After 10 mins After 20 mins 5. The test result DURIM CO.,LTD. 11 Copper heatsink ( Copper Heat Conductivity Plate )

12. 6. References * 2003 11 25 6 DURIM CO.,LTD. 12 Copper heatsink ( Copper Heat Conductivity Plate )

13. 6. References 1. Excerpts from business world section, 6 page, Nov. 25 th, 2003, The Hyundai Engineering & Construction News. Copper Heat Conductivity Plate by Durim Co.Ltd New material As economy and the level of income are getting higher, consumers interest in residence and living space is also getting higher. Other than interior field pursuing beauty, effort of problem-solving about energy efficiency such as air-conditioning and heating function of residual life is continued. Durim Co. Ltd, the specialist in building of timber, widows and doors in massive apartment complex, developedCopper heatsink being able to block the vein of water and harmful electromagnetic waves by considering our living environment and reduce 20% of heating bills by high heat conductivity, and this product was selected as the new material in Oct. 2002. Durim Copper heatsink is the material for construction to use trash material generated from manufacturing condenser case for electrolysis, this product has the form of net with many holes in aluminum board by high purity aluminum(99.3%) with high thermal conductivity. Once installing this plate in the process of construction of floor, heating efficiency becomes high, it improves the quality by crack prevention, and it is the new construction material to provide healthy living space by blocking water vein and hazardous electromagnetic waves. Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 13

14. Prevention of crack of bottom Durim Copper heatsink is the net shape of material with holes on the Durim copper heatsink handled malleably, it coheres at least 35% of tensile strength of cement mortar ignored as almost 0% of tensile strength, after heating for 2~3 years, crack on the hot water pipe can be prevented. Additionally, reducing more 10 mm of existing mortar depth than normal construction, actualizing prevention of crack of concrete bottom, decreasing the whole weight by being slim of mortar floor, so, the cost on pillar, wrapping can be reduced. Like above things, aluminum heatsink having a significant effect on energy efficiency such as comfortable heating, and 20% of heating cost, and health management such as prevention from water vein and hazardous electromagnetic waves has a simple way to construct; After installing hot water pipe for heating above slab, unfold and lay aluminum heatsink(32cm) widely on the pipe, and once installing cement mortar or remital, construction is completed. Thus, by applying Durim Copper heatsink, it can maximize and differentiate the effect of parcel out owing to the reduction of heating cost, improvement of quality of construction, blockage of water vein, we can expect the effects such as the reduction of following cost by crack maintenance in terms of internal area. Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 14

15. Effect of blocking water vein and electromagnetic waves Durim Copper heatsink is the material with high purity aluminum(99.3%), so, it has the same effect of the blocking of water vein with one of copper plate in 99.9% purity because magnetic field was generated in the circular ring structure. Radiation of electromagnetic waves from electronic products in our daily life has made 700~800MHz, Durim Copper heatsink provides healthy living life because it blocks 99% of electromagnetic waves. Effect on reduction of heating bills Owing to fast heat conductivity Reduction of 20% of heating cost Several different things generate by condition of boiler and pipe, but, normally, for heating, 70~80% of heating efficiency is generated, so, namely, it is the true that 20~30% of energy is consuming. However, During Copper heatsink built on Ondol pipe has remarkable thermal conductivity (about 140 times in quantity), so operating boiler, temperate spreads evenly all over the floor( before insertion: 26.7degree, reach time: 20min, after insertion; 5min), finally, it reduce the 20% of heating owing to decreasing heating operating time. Additionally, It solves uncomfortable feeling by a heat valley phenomenon (getting warm around the space boiler pipe passing, the other ones gets cold), and provides comfortable living space. Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 15

16. [ & ] : 2000.04.24 19:02 10' 20%. 99.3% 20~30%.. 5 26.6 20.. 1 1 5,000 ( ),,. 20. 02-547-3391 (* swpark@chosun.com*) swpark@chosun.com : 2001.09.13 20:07 54,. · · · · ·. 20%. 02-547-3391 ( wjjang@chosun.com )wjjang@chosun.com DURIM CO.,LTD. 16 7. Press releases Copper heatsink ( Copper Heat Conductivity Plate )

17. 7. Press releases (Home& Mart) Popularity of Copper heatsink with good heating conductivity Input: April, 24 th, 2000, 19:02 10 Owing to high heating conductivity, heatsink reducing average 20% of heating cost and blocking water vein is getting popular. Durim Co.,Ltd, a supplier of construction material, has explained that 20~30% of heating cost can be reduced and crack in floor can be minimized when constructing purity 99.3% of Copper heatsink between heating pipe and cement mortar. Rami wood said, Copper heatsink with high heating conductivity makes it warm evenly all over the room by transferring heating to space of heating pipe. According to research by Energy Management Corporation, in case of laying heatsink, it becomes 26.6 degrees after 5 min, but it has taken 20 min as 4 times to reach the same degrees, 26.6 degrees in case of no laying heatsink. Besides, Copper heatsink has an effect on blocking hazardous water vein and electromagnetic waves. The price is 15000 KW per 1 pyeong (separately from Construction cost), so constructing massive apartment complex such as Shin young tong complex in Suwon, Geojedong compex in Busan, Toigeoi won complex in Guri, Durim heatsink has been constructed, it will be built in Samsung apartment in Dogok dong, Seoul. This heatsink has been produced by Dongyoung electronics, a manufacturer of condenser case in Ichon, Gyeonggi do, yearly product quantity has reached 200000 households. For Inquiry: 02-547-3391 (Reporter: Park Sunwook. swpark@chosun.com)swpark@chosun.com Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 17

18. Development of heatsink for floor by using copper Input: September 13 th, 2001. 20:07 54 Heating Plate for house floor has been developed to block electromagnetic waves by using copper after producing electric product,. Durim Co. Ltd, the supplier for construction material to co-develop this product, has laid this heatsink in new apartments by house construction companies such as Samsung heavy industrial, Lotte Construction, Doosan Construction, Ssangyong Construction, Byeok san Construction, Choongang Construction, and in model house and site of high class villa. Durim Co.Ltd said, as the test result of research institute, this heatsink can not only block water vein and hazardous electromagnetic waves but also reduce 20% of heating cost thanks to high thermal conductivity. For Inquiry: 02-547-3391. (Reporter: Jang Wonjun wjjang@chosun.com) Chosun Ilbo.wjjang@chosun.com Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 18

19. 8. Application cases of Copper heatsink POSCO Construction Konkuk University STAR CITY Copper heatsink In case of existing type of Ondol heating system, temperature is high only on the upper part of hot water pipe, while temperature is relatively lower in the central part generating 20cm gap between pipe and pipe, so heat can not be spread evenly on the floor, also crack is generated after time goes. To solve this problem, the # STAR CITY is using the copper heatsink between Ondol pipe and cement mortar when constructing floor, it can maintain comfortable heating condition by quick thermal conductivity having the shape ofnet with many holes on copper heatsink with high thermal conductivity, it can reduce heating cost and prevent crack on floor. Besides, it has an effect on preventing hazardous water vein and electromagnetic waves so that it can improve the health. (Excerpts from catalog) Copper plating heatsink Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 19

20. 8. Application cases of Copper heatsink Daewoo Construction Daewoo Han River BENE CITY Copper heatsink It has effects on not only the reduction of heating cost but the blocking of water vein and electromagnetic waves. (Excerpts from catalog) The small idea can bring out the big discovery for life. Copper plating heatsink Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 20

21. 8. Application cases about Copper heatsink Lotte Construction Castle Gold Park In Daegu city Copper heatsink It improves heating efficiency by laying copper heatsink with high thermal conductivity. Economic System actualizing economical spirit. Copper plating heatsink Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 21

22. 8. Application cases about Copper heatsink Doosan Construction Doosan weve in Boon dang Copper heatsink Applying Copper heatsink, it guarantees healthy life by blocking water vein and hazardous electromagnetic waves, furthermore, it can reduce heating cost by improving heating efficiency. (Excerpts from catalog) You can enjoy clean and comfortable life, perfect security in Doosan weve. Copper plating heatsink Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 22

23. 8. Application cases about Copper heatsink SK Construction VIEW in Hadan dong, Busan city Copper heatsink Installing Copper heatsink in the whole floors of apartments having an effect on blocking water vein and electromagnetic waves, you can expect to reduce heating cost and comfortable heating by ultra speed heating (Excepts from catalog) Copper plating heatsink Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 23

24. 8. Application cases about Copper heatsink Hyundai Industrial and Development IPARK in Buldang, Cheonan city. Copper heatsink Installing Copper heatsink in the whole floors of apartments having an effect on blocking water vein and electromagnetic waves, you can expect to reduce heating cost and comfortable heating by ultra speed heating (Excepts from catalog) If water and air become clean, mind can also become clean Copper plating heatsink Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 24

25. 8. Application cases about Copper heatsink Poongrim Industrial Poongrim I ONE in Weol gok Copper heatsink Installing Copper heatsink to block water vein and hazardous electromagnetic waves in the floor of apartments, it can improve heating efficiency, and reduce heating cost. (Excepts from catalog) Special Area in the west coast, Special City for happiness. Poongrim I ONE. Special life in a special place! The cutting edge system well-matched with the dignity of sea city in 21 st century. The cutting edge system of Poongrim I ONE in Weol gok provides richness and convenience in consideration of all peoples convenience and health. Copper plating heatsink Copper heatsink ( Copper Heat Conductivity Plate ) DURIM CO.,LTD. 25

26. Unit : (175,000 Pyeong) (700,000 Pyeong) (515,100 Pyeong) (621,200 pyeong) DURIM CO.,LTD. 26 9. Yearly sales status and sales plan Copper heatsink ( Copper Heat Conductivity Plate )

27. DURIM CO.,LTD. 27 10. Track records Name of company Name of Site Quantity ( ) Delivery timeRemarks Hyundai Construction Hillstate Southern Seoul 13,0002010.03Completed 1 st Seongbook in Yongin 27,9002009.10Completed Hiparion dongtan, in Hwaseong 19,1002009.10Completed Hillstate in Songdo, Incheon 12,5002010.02Completed 3 rd hillstate in Keomdan 13,7302009.11Completed 3 rd Bukhan mountain 14,6002009.10Completed Heungduk, Yongin 13,8002009.10Completed Nonhyun, Incheon 15,9002009.10Completed 3 rd new town in Eun Pyong 20,0002009.09Completed 2 nd, 3 rd Seongbuk,, Yongin 52,5002009.07Completed Sangmoo, Kwangjoo 45,9002009.06Completed Geumjeong, Busan 6,6002009.06Completed 2 nd Geomdam, Incheon 7,1002009.06Completed 1 st, 2 nd Pajoo city 33,0002009.04Completed Sanghyun, Yongin 19,0002009.03Completed Copper heatsink ( Copper Heat Conductivity Plate )

28. DURIM CO.,LTD. 28 10. Track records Name of company Name of Site Quantity( ) Delivery timeRemarks Hyundai Construction Human sia in Pangyo21,6802008.10Completed Wondong in Osan12,3132008.06Completed Seoul forest157,1402007.10Completed Samsung dong157,1402007.10Completed Nonhyun, Incheon97,2502007.10Completed Gochon, Kimpo66,7262007.04Completed GS Engineering & Construction Apartment complex in Ilsan XI20,7002010.03Completed Geomdan in IncheonXI89,8002010.03Completed Ilsan XI638,0002009.12Completed 1 st Seongbuk XI104,7702009.09Completed 2 nd Seongbuk XI133,8902009.10Completed Choongmuro XI21,8462009.04Completed Banpo XI423,9842008.05Completed The City7 in Changwon XI122,9982008.05Completed Boutique Monaco, in Kangnam station 20,3602007.12Completed Kwangjang dong XI18,4802007.12Completed

29. DURIM CO.,LTD. 29 Name of company Name of Site Quantity( ) Delivery timeRemarks POSCO Construction The Shop Ha, Songdo, Incheon83,0002009.11Completed The Shop sen, Songdo, Incheon94,6002009.11Completed STARCITY, Kunkuk university198,0002005.07Completed Haewoon dae, Busan1,4902004.08Completed Samsung Engineering &Construction Per ST Raemian, in Banpo293,5972008.06Completed Naesondong, Euiwang9902006.06Completed Educational institute in Gyeongjoo8,0202005.10Completed Noble and swing Condominium In Pyongchang 4,6502004.09Completed 2 nd region of Gongduk, Mapo4602003.10Completed 5 th Leemun3,0002003.08Completed Kisanri, Hwaseong city6,6002003.05Completed Re-construction of far east in Seocho 13,8602002.04Completed Yongkangdong, Mapo1,3202002.04Completed 10. Track records

30. DURIM CO.,LTD. 30 10. Track records Name of company Name of Site Quantity( ) Delivery timeRemarks Doosan Construction Weve zenis in Daegu 240,0002009.01Completed Poongdong, Ilsan 3,0002005.05Completed Samgye dong, Kimhae 30,2702004.11Completed Weve, Geumgok, Boondang 27,7202003.11Completed Daesung Industrial Sky, samsandong, Ulsan 20,0002010.1Completed D-qube city, Shidorim 54,0002009.11Completed U-need, Daesung, Sadangdong 12,0002008.10Completed Hanhwa Construction Eco-metro, Incheon 12 15,0002008.11Completed Eco-metro, Incheon11 24,0002008.10Completed Daewoo Construction Lee an, Choongdong, Bucheon 27,3902007.06Completed Yongcho house 1 st quandum Myeongji, Busan 342,0762008.07Completed Quandum C, Myeongji, Busan 173,4002010.06Completed Shinsegye Construction P&Paul Ruth, Cheongdam dong 13,2002007.03Completed Shinchang Construction Villa, Cheongdamdong 3,4702007.11Completed Kolon Construction The Prou, Songdo city 30,0002009.03Completed

31. DURIM CO.,LTD. 31 Name of company Name of Site Quantity( ) Delivery timeRemarks Daemyeong Construction Kyeonghee Noblesse, Chongam 11,3602007.09Completed Shinwon General Development Morning dong city, Woongsan, Yangsan 52,9552007.09Completed Samgoo Construction Trinien Gumi 80,0002008.05Completed Trinien, Daejam, Pohang 18,1502006.03Completed Masterpiece, Daejamdong, Pohang 42,6102004.08Completed Moving, Pohang 41,9502003.11Completed Daewoo Construction Benecity, Han River 29,0402006.07Completed Lotte Construction Golden dong, Daegu 206,9802005.09Completed Banyeo dong, Daegu 34,3702004.09Completed Chimsandong, Daedu 34,3202004.09Completed Dowon dong, Daegu 89,1002004.05Completed Sooseong dong, Daegu 19,6702004.05Completed Yongsan dong, Daegu 142,2302003.11Completed Daegyo D&C Michelan Lake 6,6002006.04Completed 10. Track records

32. DURIM CO.,LTD. 32 Name Of company Name of Site Quantity( ) Delivery timeRemarks Shin myeong General Construction Hopyeong, Namyangjoo 7,5902005.09Completed Maseok, Namyangjoo 47,3102005.04Completed Pyeongnae, Namyangjoo 44,8802003.11Completed Hwaseong Industrial Dongseo byeon, Daegu 62,7002002.12Completed Padong, Daegu 16,9302003.07Completed President, Gumi 61,7102003.08Completed Grand, Chikgok, Daegu 156,0902003.11Completed Pyeongnae, Namyangjoo 25,1502004.03Completed Dreampark, Ahndong 37,9502004.04Completed Sangmo, Gumi 47,5202004.04Completed Golden dong, Daegu 177,0202005.09Completed Doosan Construction Weve, Geumgok, Boondang 27,7202003.10Completed Sangyedong, Kimhae 30,2702004.10Completed Poongdong, Ilsan 3,0002005.05Completed Daerim Industrial Sooseong, Daegu 86,1302003.09Completed 10. Track records

33. DURIM CO.,LTD. 33 10. Track records Name Of company Name of site Quantity( ) Delivery timeRemarks Daerim Industrial Won dang, Incheon 31,6802003.09Completed Site in Kileumdong 51,4802003.10Completed Billate, Secho 17,7902003.10Completed Acrovista, Secho 90,0902004.05Completed Hyundai Industrial & Development Songdo, Incheon 22,7702004.12Completed Changpo, Pohang 4,6902004.03Completed Buldang, Cheonan 75,9002004.04Completed Ssangyong Construction 2 nd Yangbulri 7,5802001.07Completed Twoi Gyeo Won 4,0402001.08Completed Poongdong, Ilsan 4,3102001.08Completed Geoje dong 6,4302001.09Completed Choongang Construction Manchondong, Daegu 20,9302004.09Completed Shinwon General Development Morning City, Woongsan, Yangsan 52,9552007.09Completed Material Center, Pohang 14,1902004.10Completed Ssangyong Construction Dongsoo Won 12,0402001.05Completed