Rinnai I Series Plus C Combi Boiler, 90,000 BTU Heat, 99,000 BTU Hot Water

This Rinnai I Series Plus C condensing combi boiler supplies both space heating and domestic hot water from one unit. It pairs 90,000 BTU of central heating with 99,000 BTU for hot water and up to 5.3 GPM of flow. It carries the lowest hot water rating and flow in the family.

The boiler is rated for natural gas or liquid propane and uses Smart Sense adaptive gas valve technology. Four built-in zones and seven heating reset curves give fine control over hydronic loops, and space heating can run while hot water is being drawn. Smart Connect adds Wi-Fi remote access and Bluetooth through the Rinnai Central app.

Venting can be concentric, twin pipe or room air. Hookups are 3/4 in. MNPT gas plus a 1/2 in. NPT condensate outlet, power is 120 V at 60 Hz, and ignition is direct electronic. Internal storage capacity is 0.75 gal, the boiler is recirculation capable, and it carries high-altitude approval up to 10,100 ft.

Highlights

• 90,000 BTU central heating plus 99,000 BTU domestic hot water

• Hot water flow up to 5.3 GPM

• Natural gas or liquid propane; Smart Sense adaptive gas valve

• 4 built-in zones and 7 heating reset curves

• Wi-Fi and Bluetooth control with the Rinnai Central app

• High-altitude approval up to 10,100 ft

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.