Rinnai CHS HCX Series 199,000 BTU Indoor Natural Gas Hybrid Water System with 119 Gallon Tank - CHS199100HCXIN

Power Rinnai CHS199100HCXIN 199,000 BTU / 119-Gal Indoor Hybrid Water System

Get fast, abundant hot water with tank-to-tankless efficiency. The Rinnai CHS199100HCXIN pairs a condensing CX199iN tankless (15,000–199,000 BTU/h) with a 119-gallon storage tank, integrated pump, and controller—ideal for restaurants, multifamily, fitness, and light commercial. Deliver up to ~317 gallons first hour @ 100 °F rise while maintaining a high 97% thermal efficiency and 0.98 UEF. Direct-vent options and a compact, preassembled layout streamline replacement of tired tank-only systems. Built-in recirculation logic reduces wait times and water waste at the tap.

• Brand: Rinnai
• MPN: CHS199100HCXIN (Demand Duo H-Series)
• Type: Indoor commercial hybrid water heater (condensing tankless + 119-gal storage, pump & controller)
• Size/Capacity: 199,000 BTU/h max input; 119 gal storage; up to ~317 gal FHD @ 100 °F rise (see spec)
• Material/Finish: Primary & secondary stainless-steel heat exchangers; enamel-lined tank with 2? foam insulation & dual magnesium anodes
• Performance: 97% thermal efficiency; 0.98 UEF; max outlet ~11.1 GPM @ 30 °F ?T; setpoint 98–185 °F
• Connections/Fit: Hot/Cold 1-1/2? MNPT (tank); Natural Gas; 120 V, 60 Hz; direct-vent twin-pipe PVC/CPVC/PP or 3?/5? concentric (max lengths per manual)
• Dimensions: Approx. 71? H × 33? W × 40? D (cabinet); weight ~431 lb
• Included: Integrated recirculation pump & DuoSmart controller; pre-installed 36? gas flex line (360° swivel); electrical junction box; T&P valve
• Certifications/Compliance: ANSI Z21.10.3 / CSA 4.3; Ultra-Low NOx (SCAQMD ?20 ppm); ENERGY STAR (per UEF metric)
• Warranty: Heat exchanger 8 yrs or 12,000 hrs; tank 6 yrs; parts 5 yrs; labor 1 yr (commercial; see Rinnai terms)

Save Energy & Lower Operating Costs

The condensing CX199iN core delivers 97% thermal efficiency with a 0.98 UEF, extracting more heat from every therm of gas. That efficiency—plus recirculation control to curb water run-time—helps reduce utility spend without sacrificing hot-water availability during peak periods. See the engineering spec for full performance details.

High First-Hour Delivery For Peak Demand

Hybrid design marries on-demand firepower with a 119-gal buffer to meet spikes. Expect up to ~317 gallons in the first hour @ 100 °F rise and stable outlet temperatures, supported by the tankless unit’s broad 15k–199k BTU/h modulation and ~11.1 GPM @ 30 °F capability. Always size from the manufacturer flow/temperature charts for your application.

Durable Materials, Built To Last

Dual stainless-steel heat exchangers resist corrosion, while the tank’s enamel lining, 2? foam insulation, and dual magnesium anodes protect against standby loss and internal wear. Safety systems include flame-failure, overheat, blocked-flue, and internal freeze protection down to -22 °F ambient.

Installer-Friendly, Pre-Assembled Package

Arrives with a 36? swivel gas flex, pre-installed electrical junction box, integrated pump, and controller— cutting field time. Direct-vent with twin-pipe PVC/CPVC/PP or 3?/5? concentric and follow the manual for max vent lengths and termination clearances. Front access simplifies commissioning and service.

Sized Right For Mechanical Rooms

The self-contained cabinet measures roughly 71? H × 33? W × 40? D, freeing floor space versus multiple tanks. Plan for condensate routing, gas sizing, and service clearances per the installation instructions.

Smart Controls & Recirculation

The DuoSmart controller provides temperature precision and integrated recirculation logic—no aquastat required. Program schedules, maintain loop temperature, and reduce fixture wait-time to improve user experience and water savings across the building.

Flexible Venting To Code

Choose direct-vent twin-pipe (PVC/CPVC/PP) or concentric. Typical CX limits are up to 75 ft with 2? pipe or 150 ft with 3? (layout-dependent); common venting options are available. Always verify allowed materials, lengths, and fittings in the current Rinnai CX installation manual for your site conditions.