Rinnai Demand Duo CHS HCX Hybrid Water System, 160,000 BTU, 119 Gallon Tank

A Rinnai Demand Duo H-Series commercial hybrid water system that pairs a 160,000 BTU condensing tankless heater with a 119-gallon storage tank. Built for indoor natural gas installation, it supplies plenty of hot water through peak commercial hours.

Because the tankless unit does the heating, the tank sees no thermal stress, which supports longer life and lowers the risk of leaks or downtime. Individual components can be repaired instead of replacing a whole system. An optimized pump raises flow and speeds recovery, and the DuoSmart digital controller manages temperature and recirculation without an aquastat. The CU160 heater is 97% thermally efficient, Ultra Low NOx compliant and ENERGY STAR rated.

The factory fits the gas dirt leg and electrical access and preassembles the condensate drain to ease installation, plus a 360-degree swivel gas flex line 36 in. long. The system weighs up to 30% less than a high-efficiency tank. It runs on 120 V, 60 Hz, sets from 98 to 185 F, supports concentric, twin pipe, room air or common venting, and is Wi-Fi and recirculation capable.

Highlights

• 160,000 BTU condensing tankless heater paired with a 119-gallon tank

• CU160 heater: 97% thermal efficiency, Ultra Low NOx, ENERGY STAR

• DuoSmart digital controller for temperature and recirculation, no aquastat

• Factory gas dirt leg, preassembled condensate drain, 360-degree gas flex line

• Outlet temperature 98 to 185 F; Wi-Fi capable

• 3/4 in. MNPT gas and 1-1/2 in. MNPT water connections

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.