Bosch, LP Tankless Water Heater, Up To 3 Major Appliances Or Showers At 1 Time, Up To 7.2GPM At A 45 Degree Temperature Rise, Built In Power Vent, Horizontal Venting With True Value #450-676/AQ3ES Vent Kit Or 3" Stainless Steel Gasketed Pipe for Vertical Venting Up To 26 Feet Maximum, Pipe Ordered Seperately, Electronic Ignition, Modulating Gas Valve From 19,900 To 199,000 BTU Input, Computer Adjusted Fuel & Air Mixture For Optimal Performance, .6 GPM Minimum Flow To Activate Burners, 3/4" Male Pipe Thread Gas & Water Connections, LP Gas Pressure Min 9" Water Column, Maximum 14" Water Column, Water Pressure Minimum 30 PSI, Maximum 150 PSI, Must Use 3" Sealed Rigid PVC Pipe For Air Intake Not Included, T & P Valve Included,12 Year Heat Exchanger Warranty , 2 Years On Parts, 120V Outlet Needed To Run Power Vent & Controls, 3 Prong Cord Included, For Outdoor Installs True Value #104-584/AQOK Is Required, Cannot Be Installed Outdoors Below Freezing, CSA Certified.