SAVE ENERGY, WATER, MONEY, TIME – Atmor offers the efficient and convenient water heating solution you have been looking for. Atmor 8.5kW/ 240V Point-of-Use Tankless Electric Instant Water Heater provides an unlimited flow of hot water without the wait or worry of ever running out. That’s right, instant hot water on demand! Rest your mind at ease and enjoy the continuous flow of hot water whenever you want. This unit is specifically designed for a single/double sink. The 8.5kw/240v unit can be used for a single shower in areas with ground water temp 67 degrees and higher. Recommended flow rate of 1.23 gallons per minute (GPM) is recommended for optimal performance (when used for a single shower, a water saver shower head required for optimal performance). Colder climates that require a higher temperature rise will reduce the amount of applications and GPM (gallons pers minute). Perfect for residential and commercial use, this compact unit can be installed against the wall either under the sink out of sight or near the point of use. Unit requires a 40 Amp dedicated single-phase, double pole breaker. Required wire size: 6 AWG. Standard 1/2" NPT (straight thread) fittings. Flow rate of 1.23 GPM = 45 degree temperature rise. NOTE: Can only be used for a single shower in warm climates with ground water temps 67 degree or higher. Unit can be used for single/double sinks nationwide. For safety reasons, the included Pressure Relief Device (PRD) included must be installed on your water heater per the instructions in the owner's manual. Failure to comply with the installation and operating instructions in our Owners Manual or improper use will void the warranty. The water heater must be installed by a licensed electrician in compliance with all local and building regulations.