1) Rinnai Corporation is a Japanese company and one of the world's leaders in gas technology and gas appliances. They are the leading manufacturer of on-demand/tankless water heaters. 2) Energy efficiency and environmental concerns are driving factors for increased adoption of tankless water heaters. Replacing gas tank water heaters with tankless models can provide significant consumer savings and reductions in CO2 emissions. 3) Rinnai promotes proper training and education to ensure high quality installation and consumer satisfaction, which has led to their market leading position in tankless water heaters. Cooperation between industry and government is needed to further promote energy efficiency.