This bundle includes the i12-NG Tankless Water Heater, 2.5" to 3" Stainless steel adapter, and the 3" Vertical vent kit. The Eccotemp i12-NG has a new revolutionary design, making it unlike any other tankless water heater on the market today. This model features sleek black tempered glass paneling, fully automatic temperature controls for precision, and a touch screen with an LED temperature display that shows output temperature and GPM flow. Rated at an impressive 3 GPM, the Eccotemp i12-NG Tankless Water Heater is a natural gas fired, indoor model designed for small to medium hot water production where you need more than one hot water application at the same time. This model also offers a 35-40 degree Fahrenheit temperature rise when operating at flow rate of 3 GPM and a 77-degree Fahrenheit temperature rise at 1.5 GPM. The Eccotemp i12-NG is perfect for vacation cabins, cottages, and smaller homes.This bundle comes with a horizontal stainless steel vent kit, ready to install and with its 120-volt UL listed power cord powering the internal exhaust fan and digital display. It only pulls about 2 watts idle and 1.07 Amps during operation, making it an ideal energy efficient appliance. Eccotemp i12-NG Dimensions:Height 25"Width 14"Depth 5"Weight approx. 29 lbs.Shipping weight 30.7 lbs. What’s Included:Stainless steel vent kit120 volt UL listed power cord2.5”-3” Stainless steel adapter3” Vertical Vent Kit2-year manufacturer warranty Some additional Features:Sleek modern designTempered glass front panelChild locking technologyLED temperature displayTrue 1/2" NPT water fittingsManual water temperature controlsNatural Gas Powered3 GPM flow capacityPower ventilation for safety, efficiency, and venting optionsTested-Safe Electronic ignition systemFully independent gas and water controlsFully automatic temperature and water flow adjustmentUses gas only when hot water is onRequires standard household 120-volt electric outletUL listed electrical componentsField tested to 5500 ft. elevation (not recommended to be used any higher)Energy factor: 79%Hot water capacity range: 0.6 - 4.8 GPMMaximum / Minimum gas rate: 25,000 - 80,000 BTUs 2.5 to 3" Stainless steel adapter This stainless steel adapter can be used with the Eccotemp i12 series taking it from a 2.5" to a standard 3" vent system. Total length is 6". Note, you may need to purchase a straight pipe piece with backflow preventer to ensure that freezing air does not come back through the vent pipe. Eccotemp Vertical Ventilation kit 3" This 3" single walled Z-Flex Vertical vent kit is for vertical installations only. You will need to purchase additional Z-Vent straight pipe. You will need to determine how many additional feet as well as need a condensation drain. Also, remember a max vent run of 20’ subtracting 4’ for every 90 Degree elbow in the run. Includes:1 x 3" Rain cap1 x 3" Top support/Storm collar1 x 3" Adjustable roof flashing (specify either normal or steep flashing)1 x 3" Universal appliance adapter1 x 3" Back flow preventer Z-Vent special gas vent kits are all made of AL-294C stainless steel and are category II/III and UL compliant. Please Note: Failure to clean and descale your water heater quarterly can result in lime and sediment build up within the heater, which can void your warranty! We recommend using our Eccotemp EZ-Flush System Descaler Kit to ensure a clean, energy efficient, long lasting heater! Click here for details.