A Convenient, Fast Upgrade. It's not complicated to get the comfort you want. The innovative design of the Rinnai RH180 Hybrid Tank-Tankless Water Heater combines the on-demand heating technology of a tankless water heater with an efficient storage tank. The Rinnai RH180 Hybrid Tank- Tankless Water Heater installs like a traditional tank-style water heater using a 1⁄2" gas line, standard water connections and 4" B-Vent, or can be common vented with a furnace.
In other words, it's an ideal upgrade opportunity that lets you enjoy increased hot water capacity without reconfiguring your setup. As a simple job for your installer, it's perfect for both home remodeling and emergency replacement situations. Standard Hookups Make Installation Quick and Easy.