16. Can I use point-of-use water heaters for applications other than a sink?
Of course you can. If you're using the Ariston models, available in 2.5-gallon, 4-gallon and 6-gallon sizes, you can place them in-line with your main water heater. This way you can get instant hot water at your washing machine or dishwasher. By the time you're done with it, the main Tankless Water Heater catches up, so you can have a continuous supply of hot water.