Rinnai Demand Duo R Series 199,000 BTU Indoor Natural Gas Hybrid Water Heater System with 119 Gallon Tank - CHS199100RECIN

Power Rinnai CHS199100RECIN 199,000 BTU / 119-Gal Demand Duo R-Series Indoor Hybrid Water System

Upgrade tank change-outs with a hybrid that blends on-demand heating and buffered storage. The Rinnai CHS199100RECIN Demand Duo R-Series pairs a non-condensing 199k BTU tankless engine with a 119-gallon tank and integrated recovery pump—ideal for restaurants, multifamily, fitness, and light commercial. Expect dependable hot water during peaks with up to ~276 gallons first hour @ 100 °F rise, while the tankless engine’s wide modulation keeps temperatures steady. A pre-installed gas flex and junction box speed installs; dimensions fit through standard doors.

• Brand: Rinnai
• MPN: CHS199100RECIN
• Type: Indoor commercial hybrid water heater (non-condensing tankless + 119-gal storage, integrated recovery pump)
• Size/Capacity: 199,000 BTU/h max input (≈58.3 kW); 11,900–199,000 BTU/h modulation; 119 gal tank
• Material/Finish: Copper tankless heat exchanger; enamel-lined storage tank with 2″ foam insulation & dual magnesium anodes
• Performance: UEF 0.81 (TEF ~0.80); up to ~276 gal FHD @ 100 °F rise; up to 9.8 GPM @ 30 °F ΔT; setpoint 120–180 °F
• Connections/Fit: Hot/Cold 1-1/2″ MNPT (tank); Natural Gas; 120 VAC, 60 Hz; recirculation-capable; compatible with existing 6″ B-vent connector (see manual)
• Dimensions: Approx. 71.4″ H × 28.5″ W × 40.2″ D; weight ~364 lb (cabinet)
• Included: Integrated recovery pump & controller; 36″ pre-installed swivel gas flex; pre-installed electrical junction box; pressure-relief valve; brass drain valve
• Certifications: ANSI Z21.10.3 / CSA 4.3; Low NOx (≤14 ng/J, SCAQMD); AHRI listed; Wi-Fi capable
• Warranty: Heat exchanger 8 years or 12,000 hours; tank 6 years; parts 5 years; labor 1 year (commercial; see terms)

Save Energy & Lower Operating Costs

The tankless engine heats water only as needed, then the 119-gal tank buffers spikes—reducing short-cycling and standby loss versus atmospheric tanks. UEF 0.81 performance and precise electronic controls help trim fuel use while maintaining target temperatures during rush periods.

High First-Hour Delivery For Peak Demand

Deliver up to ~276 gal in the first hour at a 100 °F rise while the 11.9k–199k BTU/h modulation adapts to real-time load. The result is consistent outlet temperature for showers, dish rooms, and back-to-back draws—without oversizing multiple tanks.

Durable Materials, Built To Last

A copper heat exchanger, enamel-lined tank with 2″ foam insulation, and dual magnesium anodes protect against corrosion and heat loss. Safety systems include flame-failure, overheat, blocked-flue, and internal freeze protection down to −22 °F ambient.

Installer-Friendly Retrofit Package

Arrives with a 36″ swivel gas flex and pre-installed junction box to cut field time. The R-Series design can adapt to an existing 6″ B-vent connector in many replacements (see manual for venting), helping avoid major penetrations and speed turnarounds.

Sized Right For Mechanical Rooms

At roughly 71.4″ × 28.5″ × 40.2″, the cabinet fits through standard doorways and onto typical pads. Plan for 1-1/2″ water, gas sizing, condensate management not required (non-condensing), and service clearances per Rinnai’s diagram.

Smart Controls & Recirculation

The integrated controller manages recovery pump operation—no add-on aquastat needed. Add optional Wi-Fi for monitoring and alerts, and use the thermostat to set 120–180 °F in 5 °F steps.

Reliable Compliance & Serviceability

Listed to ANSI Z21.10.3/CSA 4.3 with Low-NOx emissions. Modular components and common service parts simplify maintenance and reduce downtime compared with one-piece atmospheric tanks.