Bosch 7-738-007-219 Singular Condensing Combi BoilersBosch Water Heater 7 738 007 219 Bosch Singular combi boilers are the "singular solution" for efficient, dependable home heating with up to 7. 7 gallons per minute of domestic hot water production. Depending on incoming water temperature, Singular can run up to three showers and a dishwasher simultaneously. Singular is a wall mounted combi boiler that can be used in many hydronic heating applications. Their small, lightweight form makes for easy