Dongseo Metal Co., Ltd. (DSM) is a specialized B2B manufacturer of core components for high-efficiency energy equipment, established in 1996, focusing on the development and production of heat exchangers and electric heaters. The company's business model involves supplying key components like latent heat exchangers for condensing boilers and high-efficiency electric heaters for electric boilers to domestic and international boiler manufacturers. Leveraging numerous patented technologies and automated systems, it leads the eco-friendly, high-efficiency heating solution market. Furthermore, as the exclusive Korean distributor for Jinko Solar, the company has expanded into the renewable energy sector.DongseoMetalCo.,Ltd.(DSM)isaspecializedB2Bmanufacturerofcorecomponentsforhigh-efficiencyenergyequipment,establishedin1996,focusingonthedevelopmentandproductionofheatexchangersandelectricheaters.Thecompany'sbusinessmodelinvolvessupplyingkeycomponentslikelatentheatexchangersforcondensingboilersandhigh-efficiencyelectricheatersforelectricboilerstodomesticandinternationalboilermanufacturers.Leveragingnumerouspatentedtechnologiesandautomatedsystems,itleadstheeco-friendly,high-efficiencyheatingsolutionmarket.Furthermore,astheexclusiveKoreandistributorforJinkoSolar,thecompanyhasexpandedintotherenewableenergysector.
Key Products/TechnologiesKeyProducts/Technologies
Heat Exchangers: Primarily produces latent heat exchangers for condensing boilers, utilizing stainless steel materials, patented double-tube structures, and heat transfer fin designs for high thermal efficiency and durability. Brazing technology enhances product reliability, contributing to improved energy efficiency ratings for boiler manufacturers. Also supplies heat exchangers for general boilers, with specific model names not explicitly provided.HeatExchangers:Primarilyproduceslatentheatexchangersforcondensingboilers,utilizingstainlesssteelmaterials,patenteddouble-tubestructures,andheattransferfindesignsforhighthermalefficiencyanddurability.Brazingtechnologyenhancesproductreliability,contributingtoimprovedenergyefficiencyratingsforboilermanufacturers.Alsosuppliesheatexchangersforgeneralboilers,withspecificmodelnamesnotexplicitlyprovided.
Copper Processed Parts: Manufactures copper pipes for HVAC systems and various other copper processed parts, demonstrating precise processing capabilities to provide customized products tailored to client requirements.CopperProcessedParts:ManufacturescopperpipesforHVACsystemsandvariousothercopperprocessedparts,demonstratingpreciseprocessingcapabilitiestoprovidecustomizedproductstailoredtoclientrequirements.
Aluminum Processed Parts: Produces aluminum processed parts used in boilers and air conditioners, showcasing expertise in manufacturing precision components that meet the demands of diverse industrial sectors.AluminumProcessedParts:Producesaluminumprocessedpartsusedinboilersandairconditioners,showcasingexpertiseinmanufacturingprecisioncomponentsthatmeetthedemandsofdiverseindustrialsectors.
Brass Processed Parts: Manufactures brass processed parts for applications such as boilers, air conditioners, and water hammer absorbers, leveraging the excellent machinability and corrosion resistance of brass materials for precision component production.BrassProcessedParts:Manufacturesbrassprocessedpartsforapplicationssuchasboilers,airconditioners,andwaterhammerabsorbers,leveragingtheexcellentmachinabilityandcorrosionresistanceofbrassmaterialsforprecisioncomponentproduction.
Fin Coils: Produces fin coils essential for heating and cooling equipment, possessing efficient and precise fin coil manufacturing capabilities through its dedicated processing lines.FinCoils:Producesfincoilsessentialforheatingandcoolingequipment,possessingefficientandprecisefincoilmanufacturingcapabilitiesthroughitsdedicatedprocessinglines.
Electric Boilers: Manufactures electric boiler components, including high-efficiency electric heaters, incorporating internal heating tank divisions and high-fin processing technology to maximize heat exchange efficiency. Offers electric boiler models such as DEH-09, DEH-12, DEH-15, and DEH-18.ElectricBoilers:Manufactureselectricboilercomponents,includinghigh-efficiencyelectricheaters,incorporatinginternalheatingtankdivisionsandhigh-finprocessingtechnologytomaximizeheatexchangeefficiency.OfferselectricboilermodelssuchasDEH-09,DEH-12,DEH-15,andDEH-18.
Core AdvantagesCoreAdvantages
High-Efficiency and Eco-Friendly Technology: The patented double-tube structure, heat transfer fin design, and use of stainless steel in its latent heat exchangers for condensing boilers ensure high thermal efficiency and durability, positioning the company as a leader in eco-friendly heating solutions.High-EfficiencyandEco-FriendlyTechnology:Thepatenteddouble-tubestructure,heattransferfindesign,anduseofstainlesssteelinitslatentheatexchangersforcondensingboilersensurehighthermalefficiencyanddurability,positioningthecompanyasaleaderineco-friendlyheatingsolutions.
Customized Design and Development (ODM) Capabilities: Possesses the ability to design and develop customized products according to the specifications of domestic and international boiler manufacturers, allowing flexible responses to diverse customer needs.CustomizedDesignandDevelopment(ODM)Capabilities:Possessestheabilitytodesignanddevelopcustomizedproductsaccordingtothespecificationsofdomesticandinternationalboilermanufacturers,allowingflexibleresponsestodiversecustomerneeds.
Automated Production System and Quality Management: Accumulated experience, know-how, and investment in state-of-the-art automated machinery ensure stable quality and timely delivery, providing a significant competitive edge. The company operates a systematic quality management system, evidenced by its ISO 9001:2015 certification.AutomatedProductionSystemandQualityManagement:Accumulatedexperience,know-how,andinvestmentinstate-of-the-artautomatedmachineryensurestablequalityandtimelydelivery,providingasignificantcompetitiveedge.Thecompanyoperatesasystematicqualitymanagementsystem,evidencedbyitsISO9001:2015certification.
Diversified Business Portfolio: In addition to heat exchangers for gas boilers, the production of high-efficiency electric heaters and related components, along with its role as the Korean distributor for Jinko Solar in the solar power business, represents a strategy to adapt to changing energy markets and secure new growth engines.DiversifiedBusinessPortfolio:Inadditiontoheatexchangersforgasboilers,theproductionofhigh-efficiencyelectricheatersandrelatedcomponents,alongwithitsroleastheKoreandistributorforJinkoSolarinthesolarpowerbusiness,representsastrategytoadapttochangingenergymarketsandsecurenewgrowthengines.
Possession of Multiple Patents: Holding 8 patents, the company's numerous patented technologies contribute to maximizing heat transfer efficiency and enhancing product durability, serving as a core competency for technological differentiation.PossessionofMultiplePatents:Holding8patents,thecompany'snumerouspatentedtechnologiescontributetomaximizingheattransferefficiencyandenhancingproductdurability,servingasacorecompetencyfortechnologicaldifferentiation.
Target IndustrieTargetIndustrie
Boiler Industry: A primary industry sector where the company supplies core components like latent heat exchangers and electric heaters to manufacturers of condensing and general boilers.BoilerIndustry:Aprimaryindustrysectorwherethecompanysuppliescorecomponentslikelatentheatexchangersandelectricheaterstomanufacturersofcondensingandgeneralboilers.
HVAC Industry: Contributes to the heating, ventilation, and air conditioning system manufacturing industry through its production of air conditioner parts, fin coils, and processed copper pipes.HVACIndustry:Contributestotheheating,ventilation,andairconditioningsystemmanufacturingindustrythroughitsproductionofairconditionerparts,fincoils,andprocessedcopperpipes.
Renewable Energy Industry: Participates in the renewable energy market by supplying solar modules and engaging in solar power generation projects as the Korean distributor for Jinko Solar.RenewableEnergyIndustry:ParticipatesintherenewableenergymarketbysupplyingsolarmodulesandengaginginsolarpowergenerationprojectsastheKoreandistributorforJinkoSolar.
Major MarketsMajorMarkets
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Certifications/PatentsCertifications/Patents
8 Patents Held: As of November 2025, the company holds 8 patents, covering technologies related to maximizing heat transfer efficiency and enhancing product durability.8PatentsHeld:AsofNovember2025,thecompanyholds8patents,coveringtechnologiesrelatedtomaximizingheattransferefficiencyandenhancingproductdurability.
ISO 9001 Certification: Obtained ISO 9001 quality management system certification from the German RWTUV international certification body in October 2000, and maintains the updated 2015 version of this certification.ISO9001Certification:ObtainedISO9001qualitymanagementsystemcertificationfromtheGermanRWTUVinternationalcertificationbodyinOctober2000,andmaintainstheupdated2015versionofthiscertification.
ISO 14001:2004 Certification: Acquired ISO 14001 environmental management system certification in July 2008, demonstrating its commitment to environmentally friendly management practices.ISO14001:2004Certification:AcquiredISO14001environmentalmanagementsystemcertificationinJuly2008,demonstratingitscommitmenttoenvironmentallyfriendlymanagementpractices.
KS Mark and Q-Mark for Water Hammer Absorbers: Received KS mark certification and Q-Mark for its water hammer absorbers in December 2006, acknowledging the product's quality and safety.KSMarkandQ-MarkforWaterHammerAbsorbers:ReceivedKSmarkcertificationandQ-MarkforitswaterhammerabsorbersinDecember2006,acknowledgingtheproduct'squalityandsafety.
Inno-Biz Certification: Certified as an Inno-Biz company in October 2007, recognizing its capabilities as a technology innovation-driven small and medium-sized enterprise.Inno-BizCertification:CertifiedasanInno-BizcompanyinOctober2007,recognizingitscapabilitiesasatechnologyinnovation-drivensmallandmedium-sizedenterprise.
R&D Center Approval: Approved as a dedicated R&D department by the Korea Industrial Technology Association in September 2007, focusing on continuous technological development.R&DCenterApproval:ApprovedasadedicatedR&DdepartmentbytheKoreaIndustrialTechnologyAssociationinSeptember2007,focusingoncontinuoustechnologicaldevelopment.
Chungcheongnam-do Promising SME Designation: Designated as a promising small and medium-sized enterprise by Chungcheongnam-do in July 2008, recognized for its contribution to regional economic development.Chungcheongnam-doPromisingSMEDesignation:Designatedasapromisingsmallandmedium-sizedenterprisebyChungcheongnam-doinJuly2008,recognizedforitscontributiontoregionaleconomicdevelopment.
Venture Company Certification: Obtained venture company certification in June 2009 and confirmed as a venture company by the Korea Technology Finance Corporation in October 2016, indicating an innovative business model.VentureCompanyCertification:ObtainedventurecompanycertificationinJune2009andconfirmedasaventurecompanybytheKoreaTechnologyFinanceCorporationinOctober2016,indicatinganinnovativebusinessmodel.
Renewable Energy Equipment Certification: Acquired renewable energy equipment certification from the Korea Energy Agency in December 2015, affirming its expertise in the solar power business sector.RenewableEnergyEquipmentCertification:AcquiredrenewableenergyequipmentcertificationfromtheKoreaEnergyAgencyinDecember2015,affirmingitsexpertiseinthesolarpowerbusinesssector.
Designation as a Root Technology Specialist Company: Designated as a Root Technology Specialist Company by the Small and Medium Business Administration in May 2016, recognizing the excellence of its manufacturing base technologies.DesignationasaRootTechnologySpecialistCompany:DesignatedasaRootTechnologySpecialistCompanybytheSmallandMediumBusinessAdministrationinMay2016,recognizingtheexcellenceofitsmanufacturingbasetechnologies.