Rinnai IP175199C Combi Boiler, Natural Gas/Propane, 175,000 BTU Heat, 9.8 GPM

This Rinnai I Series Plus C condensing combi boiler supplies both space heating and domestic hot water from one unit. It pairs 175,000 BTU of central heating with 199,000 BTU for hot water and up to 9.8 GPM of flow. Its heating output is one step below the top model in the family.

Up to 24 boilers can be cascaded and as many as 8 can share common venting, for installations that need more than one boiler. It uses a new and improved heat exchanger, four built-in zones, seven heating reset curves and an improved front display with a quick set-up screen. Smart Connect adds Wi-Fi and Bluetooth through the Rinnai Central app.

Venting can be concentric, twin pipe or room air. Hookups are 3/4 in. MNPT gas and 3/4 in. MNPT water plus a 1/2 in. NPT condensate outlet, power is 120 V at 60 Hz, and ignition is direct electronic. Internal storage capacity is 2.4 gal, the boiler is recirculation capable, and it carries high-altitude approval up to 10,100 ft.

Highlights

• 175,000 BTU central heating plus 199,000 BTU domestic hot water

• Hot water flow up to 9.8 GPM

• Cascade up to 24 units; common venting for up to 8

• 2.4 gal storage capacity

• 4 built-in zones and 7 heating reset curves

• 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.