Brand. Smith is a brand, with a history of 100 years, an American multinational company, and a world-renowned manufacturer and service provider of household appliances such as water heaters, water purifiers and air purifiers. Smith Company has three production and research bases and five CNAS-certified R&D laboratories in China, with nearly 500 R&D employees and 456 patented technologies. Their water heater products are deeply loved by consumers for their excellent quality, powerful functions, energy saving and environmental protection.