Bosch offers two new models of condensing gas-fired tankless water heaters for domestic hot water on-demand applications: Greentherm C 1050 ES and C 950 ES. They are equipped with an automated and fully modulating bypass for temperature stability. The wall-mounted units offer multiple venting options, including up to four-unit cascades vented together through a sidewall or roof. For commercial applications, Bosch offers its Therm C 1210 ESC tankless water heater. The gas-fired condensing Bosch Therm C 1210 features a space-saving design, affording easy servicing access and can be cascaded using up to 24 units.