- Business
- Rinnai Corporation manufactures and sells thermal equipment, including gas appliances and related products, primarily for residential and commercial applications. Founded in 1920 and headquartered in Nagoya, Japan, the company operates through six regional segments in Japan and maintains a global presence with subsidiaries and sales operations in over 20 countries and regions, including the United States, Australia, China, South Korea, Indonesia, Europe, Latin America, and Asia-Pacific markets; its international sales account for approximately 30% of total revenue. Core products and services encompass tankless water heaters, condensing gas water heaters, hybrid water heaters with heating systems such as ECO ONE and ECO ONE X5, gas stoves and cooking appliances including glass-top stoves with inner flame burners and commercial cooking equipment, gas heaters and bathroom heater/dryers, HVAC systems, air conditioning units, industrial equipment, and emerging renewable energy solutions like hydrogen-ready boilers, low-GWP heat pumps, solar thermal systems, and R290 commercial heat pumps; the company targets households, businesses, and utilities with a focus on energy efficiency, safety features, and environmental sustainability. Recent major developments include the acquisition of Smart Energy Group in Australia in 2024 to expand into solar PV systems and battery storage, the acquisition of Industrias MASS in Mexico in 2021 to bolster Latin American operations, the purchase of Brivis Climate Systems in Australia in 2015, and the completed acquisition of Peru-based MT Industrial S.A.C. in October 2025, a leading housing equipment sales company with ¥9.8 billion in 2024 net sales, to strengthen market presence in Peru and broader Latin America through enhanced sales networks for water heaters, home appliances, and installation services.