Rinnai Demand Duo R Hybrid Water Heater, 199,000 BTU, 119 Gal, Propane

The Rinnai Demand Duo R Series pairs a 199,000 BTU tankless engine with a 119-gallon tank, running on liquid propane. It is an alternative to standard-efficiency commercial tanks in apartments, hotels and restaurants, and it exhausts into a 6 in. B-vent connector.

Venting is B-vent type. Since the tankless engine handles heating and the tank only stores water, the tank avoids thermal stress and the risk of leaks or downtime drops. Components can be repaired individually, and the lighter build makes handling easier.

A DuoSmart digital controller sets temperature precisely and runs recirculation without an aquastat. The gas swivel flex line rotates 360 degrees to line up with the supply. Rated energy efficiency is 80%, and the unit is both recirculation capable and Wi-Fi capable.

Highlights

• 199,000 BTU tankless engine feeding a 119 gal tank

• Vents into a 6 in. B-vent exhaust connector

• Tank-tankless design spares the tank from thermal stress

• DuoSmart controller, no aquastat required

• 80% energy efficiency, recirculation and Wi-Fi capable

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.