Tankless-for-tank replacement installation now is easy and affordable with the EZTR40 condensing tankless water heater for residential applications. Replaces a 40-gallon tank-type water heater for 2-bath residences in warm-weather climates. Vents with 2" flexible polypropylene tubing that is threaded directly through the existing B-Vent. Water connections are located on the top to allow using existing flexible hot-and-cold-water lines to be easily reconnected. Uses the same 1/2" gas line used by the old tank unit, cutting labor time and material costs. Includes a step-by-step manual that gives simple, visual instructions on how to install the unit.