Rinnai RE Series REP199iN Indoor Tankless Water Heater with Pump, Natural Gas

The Rinnai REP199iN is an indoor, non-condensing tankless water heater for natural gas with a built-in recirculation pump. Rated at 199,000 BTU and 7.9 GPM, it fits small to medium homes and remodels that want hot water at several fixtures at once.

Smart-Circ recirculation learns household usage patterns and has hot water ready on that schedule. Homes without a dedicated return line can still recirculate by adding an optional thermal bypass valve. The heater runs only when there is a hot water demand, which trims energy use, and its compact, suitcase-sized body can go in crawl spaces, attics and other tight spots.

Venting is concentric PVC/CPVC, with the inner pipe carrying exhaust and the outer pipe bringing in outdoor air, so a single wall or roof penetration forms a direct-vent system in vertical or horizontal terminations. Efficiency is rated at 0.81 UEF, set temperature ranges from 120 to 140°F, and the unit is Wi-Fi ready with the control-r module.

Highlights

• 199,000 BTU input with up to 7.9 GPM

• Built-in recirculation pump with Smart-Circ learning

• 0.81 Uniform Energy Factor

• Concentric direct venting through one wall or roof penetration

• Compact enough for attics and crawl spaces

• Wi-Fi ready with the control-r module

Specifications

Good to know

• Gas-fired appliance: it must be installed, vented and commissioned by a qualified installer in line with local codes and the manufacturer's installation manual.