Rinnai CHS HCX Horizontal Hybrid System, 398,000 BTU, 119 Gal ASME, Natural Gas

This horizontal Rinnai CHS HCX hybrid system combines 398,000 BTU of condensing tankless input with 119 gallons of ASME certified tank storage. It is meant for commercial buildings on natural gas that need high hot water volume during peak hours and must use an ASME certified vessel.

Heating happens in the tankless engines rather than inside the tank, which removes thermal stress from the storage vessel and helps it last. Parts can be serviced one at a time instead of swapping the whole system. The DuoSmart digital controller holds temperature and runs recirculation with no aquastat, and the system is Wi-Fi capable.

Installers get a factory-fitted gas dirt leg, accessible electrical hookup and preassembled condensate drain, plus a gas swivel flex line that turns 360 degrees. The CU199 engines deliver 97% thermal efficiency and are Ultra Low NOx compliant and ENERGY STAR certified. The system can weigh up to 37% less than a high-efficiency tank.

Highlights

• 398,000 BTU condensing input with 119 gal of ASME certified storage

• Horizontal configuration with ASME certified tanks

• CU199 engines at 97% thermal efficiency

• Ultra Low NOx compliant and ENERGY STAR certified

• DuoSmart control with recirculation and Wi-Fi capability

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.