Weil-McLain’s 95% AFUE high-efficiency ECO Tec boiler features heat only and combi versions for all residential space and domestic hot water heating, the company explains. 

The Noritz Residential Combination Boiler (NRCB) allows for simultaneous residential, domestic hot water and space heating. 

Bosch singular combi wall boilers provide efficient heating and hot water for residential applications. Depending on inlet water temperature, the 4000 model can run between two and three showers.