The NORITZ NRC111DV series heater is at the forefront of modern high efficiency water heating. It's advance heat exchanger is produced from commercial grade K-Copper which is 25% thicker than competitive models. With flow rates up to 11 gallons per minute the NRC111DV delivers the highest flow rates in it category and can be vented using 3" or 4" Schedule 40/80 PVC, PP or CPVC. Various adapters and terminations are available to allow for a wide array of venting options. This unit is also Quick Connect compatible meaning you can link two identical units together for additional capacity and redundancy (QC-2 sold separately). This unit ships complete with controller and 6' power cord. IK-WV-200-1-XX-LF valve kit (required for installation) sold separately. Common companion items include rain cap (PRC-1), atmospheric conversion kit (SVCK-3) and horizontal termination/intake PVT-HL.