Rinnai IP090199C i-Series Plus 90,000 BTU Condensing Combi Boiler, 95% AFUE

Product Description

The RINNAI ip090199c is a condensing gas combination boiler from the I-Series Plus line, designed for residential heating applications that require simultaneous space heating and domestic hot water delivery. Rated at 95% AFUE, this combi boiler delivers high efficiency performance across a wide output range from 90,000 to 199,000 BTU/h. It features an advanced front panel display with intuitive controls, Smart Sense Adaptive Gas Valve Technology on models up to 150,000 BTU/h, and seven heating reset curves — six standard and one custom — for consistent hydronic system temperatures. Licensed HVAC and plumbing professionals handle installation and commissioning of this unit.

The ip090199c is built for residential gas heating projects of varying size and complexity. It supports four built-in heating zones for improved comfort control and includes air handler connectivity for expanded system integration. Cascade capability allows pairing one combi unit with up to 23 tankless units and common venting of up to eight units, making this boiler suitable for both single-family and more complex multi-zone residential installations. High altitude approval extends operation up to 10,100 feet above sea level, broadening the range of viable job sites.

Key Features

• 95% AFUE condensing efficiency for significant energy savings on gas consumption
• Simultaneous domestic hot water and space heating delivery on all Combi models
• Four built-in zones for zoned comfort control without additional controllers
• Smart Sense Adaptive Gas Valve Technology available on models up to 150,000 BTU/h
• Seven heating reset curves (six standard, one custom) for precise hydronic temperature management
• Cascade compatible — one Combi unit plus up to 23 tankless units with common venting for up to eight units
• Low NOx emissions at 20 ppm, compliant with SCAQMD standards
• High altitude approved for operation up to 10,100 feet

Compatibility

Designed as an OEM I-Series Plus condensing gas combi boiler for residential space heating and domestic hot water systems. Compatible with Rinnai cascade configurations combining one Combi unit with up to 23 tankless units and supporting common venting for up to eight units.

Installation Notes

Installation must be performed by a licensed HVAC technician or plumber in accordance with local mechanical codes, the International Fuel Gas Code (IFGC), and applicable local gas utility requirements. Shut off gas supply and disconnect electrical power before servicing or making connections. Venting must be installed per the manufacturer specifications and local code — do not mix venting components from other manufacturers. Commissioning should include verifying gas pressure, confirming proper condensate drainage, and testing all zone controls before returning the system to service.

Technical Specifications

• Output Range: 90,000 to 199,000 BTU/h
• AFUE: 95%
• Built-In Zones: 4
• Heating Reset Curves: 7 (6 standard, 1 custom)
• NOx Emissions: 20 ppm (SCAQMD compliant)
• Maximum Altitude Rating: 10,100 feet
• Cascade Capacity: 1 Combi unit plus up to 23 tankless units; common venting up to 8 units

Standard Information

• Brand: RINNAI
• Manufacturer Part Number: ip090199c