Dong Yong Hot Water System Inc. is a Taiwan based ISO-certified manufacturer specializing in gas fired condensing water heating products.东永热水系统公司是一家台湾的ISO认证制造商，专门生产燃气冷凝水加热产品。Over 20 years of experience with a gas fired condensing engineering, and new product development expertise, tooling and testing capabilities combined with strict quality control processes, we€™ll provide OEM / ODM customers high quality at reasonable cost and with the most professional and efficient service.我们在燃气冷凝工程领域拥有20多年的经验，并拥有新产品开发专业知识，工具和测试能力以及严格的质量控制流程，我们将以合理的成本和最专业，最高效的方式为OEM / ODM客户提供高质量的产品服务。Our products include:1. 我们的产品包括：1。Gas fired wall-mounted condensing combination boiler2. 燃气壁挂式冷凝组合锅炉2。Gas fired wall-mounted condensing instantaneous water heater3. 燃气壁挂式冷凝瞬时热水器3。Gas fired condensing storage water heater燃气冷凝式储水热水器