Amazon is offering the Marey ECO085 Electric Tankless Water Heater for $158.58 shipped. Down from its regular $189, this $30 discount is the second-lowest price we have tracked, falling just $0.08 shy of the all-time low back in May. With a compact size designed to be installed almost anywhere, this 220V tankless water heater is able to provide endless hot water as a single point of use, making it perfect for positions directly under your sink. It measures 11-inches by 11-inches by 5-inches, and offers an 8.5-gallon-per-minute flow rate that only heats water when its needed, saving you on energy costs.