Rinnai is the top manufacturer of tankless water heaters. We are honored to be one of their tested and approved dealers. Tankless water heaters are on-demand hot water heaters, which produce hot water only when necessary, instead of you having to pay to keep a large tank of water hot. They are very energy and space efficient, last longer than the average water heater, and have a larger capacity! Rinnai tankless water heaters are now elegible for the government rebate programs! Call us for more details.