American Hometec. Unlike other point-of-use water heaters, the AHQ-T16 electric tankless water heater is sized to provide enough on-demand hot water for an average-size bathroom and is styled for use in plain view, instead of being hidden in a closet or cabinet. The T16 features the maker’s patented Coilless Technology, which warms water through heat transfer rather than via coils immersed in the water. The technology eliminates maintenance associated with lime-scale buildup on coil-style models, the maker says. The T16 allows users to easily set and adjust desired water temperature and is available in a 16kW capacity with a 240-volt electrical requirement. 877.662.6457.