Rinnai

About

Rinnai tankless water heaters deliver endless hot water with compact, efficient designs. Build the right system with indoor or outdoor models in natural gas or propane, condensing or non-condensing, recirculation options, clean venting, and the install parts to finish the job. Shop by category Condensing (SENSEI series): high-efficiency indoor/outdoor units; concentric or 2-pipe venting Non-condensing: value models for simple replacements and mild climates Recirculation: built-in pump models, recirc-ready units, crossover/bypass kits, timers and controls Venting & covers: concentric and twin-pipe kits, terminations, pipe covers, wall thimbles Controls: wall remotes and optional Wi-Fi/app modules Install & service parts: isolation/flush valve kits, filters, condensate neutralizers, NG/LP conversion kits, repair parts Quick choosing guide Size by demand: total peak fixtures and calculate GPM at your winter temperature rise; select a unit that meets that flow on the spec curve. Pick location & fuel: indoor with a vent route or outdoor where climate allows; choose natural gas or propane and confirm gas line capacity. Efficiency: choose condensing for higher efficiency (plan a condensate drain/neutralizer) or non-condensing for straightforward replacements. Faster hot water: pick a built-in recirc model or add a recirc kit to a recirc-ready unit; set schedules to reduce wait time. Venting: select concentric or 2-pipe per the manual; follow clearances and use approved materials and terminations. Complete the kit: install isolation/flush valves, pipe cover if desired, controller/Wi-Fi, sediment filter, and proper electrical/gas shutoff.