Best under sink water heaters

Our top 2 picks

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  BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

  The Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon ES4 is a compact and efficient solution for instant hot water needs. With a 4-gallon capacity, it fits seamlessly under sinks, providing immediate hot water access with a remarkable 98% thermal efficiency. This makes it ideal for kitchens, bathrooms, or any point-of-use location where hot water is required quickly. Customers appreciate its energy efficiency, noting minimal power draw even when not actively in use. Installation is straightforward, and the unit can be mounted on a shelf, wall, or floor, making it versatile for various spaces. The heater's compact design and ease of installation are particularly beneficial for those with limited space or who wish to avoid extensive plumbing work. Overall, the Bosch ES4 offers a practical and energy-saving solution for anyone looking to reduce hot water wait times and improve energy use efficiency.
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  BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

  The Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon ES2.5 is a compact and efficient solution for delivering hot water right where you need it. With a 2.5-gallon capacity, this mini-tank fits conveniently under sinks, making it perfect for small homes, garages, offices, and in-law suites. Its versatile installation options allow it to be shelf, wall, or floor mounted, ensuring flexibility to suit various spaces. Users appreciate its thermal efficiency and fast recovery rate, which eliminate the wait for hot water, providing immediate access at up to two sinks simultaneously. The unit is easy to install, requiring just a 120-volt outlet, making it an accessible option for those seeking to enhance their hot water access without extensive plumbing work. Overall, the Bosch Tronic 3000 T is praised for its reliability, performance, and energy efficiency, making it a top choice for point-of-use water heating needs.