Rinnai Demand Duo CHS HCX Hybrid Water System, 160,000 BTU, 80 Gallon Tank

A Rinnai Demand Duo H-Series commercial hybrid water system combining a 160,000 BTU condensing tankless heater with an 80-gallon storage tank. Set up for indoor natural gas use, it suits sites that want tankless efficiency with stored hot water for peak demand in a smaller footprint.

With the tankless unit doing the heating, the tank avoids thermal stress, supporting longer service life and reducing the chance of leaks or downtime. Parts can be repaired individually rather than replacing an entire system. An optimized pump improves flow and recovery, and the DuoSmart digital controller handles temperature and recirculation with no aquastat. The CU160 heater offers 97% thermal efficiency, Ultra Low NOx compliance and ENERGY STAR rating.

The factory fits the gas dirt leg and electrical access and preassembles the condensate drain to shorten installation, and a 36 in. gas flex line swivels 360 degrees. The system is up to 25% lighter than a high-efficiency tank, at 221 lb. It operates on 120 V, 60 Hz, adjusts from 98 to 185 F, accepts concentric, twin pipe, room air or common venting, and is Wi-Fi and recirculation capable.

Highlights

• 160,000 BTU condensing tankless heater with an 80-gallon tank

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

• DuoSmart digital controller for temperature and recirculation, no aquastat

• Up to 25% lighter than a high-efficiency tank

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

• 3/4 in. MNPT gas, 1-1/2 in. MNPT water, 1/2 in. NPT condensate

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.