Rinnai I Series Plus C Combi Boiler, 90,000 BTU Heat, 199,000 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 199,000 BTU for hot water and up to 9.8 GPM of flow. It suits homes with modest heating loads but high hot water demand.

Smart Sense gas valve technology switches between natural gas and propane without a conversion kit. A proportional valve system keeps showers steady while the heating loop runs, and Smart Connect provides Wi-Fi and Bluetooth monitoring through the Rinnai Central app. Four built-in zones and seven reset curves tailor output to the climate.

Rated up to 96% AFUE with Energy Star certification, it mounts on an indoor wall and vents with 2 in. pipe up to 75 ft. Common venting covers up to 8 units, emissions are ultra-low NOx, and operation is approved up to 10,100 ft.

Highlights

• 90,000 BTU central heating plus 199,000 BTU domestic hot water

• Hot water flow up to 9.8 GPM

• Up to 96% AFUE, Energy Star certified

• No conversion kit needed to switch between natural gas and propane

• 2 in. venting up to 75 ft

• 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.