Rinnai 1600i Internal 58.4kW Low-NOx Condensing LPG Gas Water Heater
Get on-demand hot water with the Rinnai 1600i Internal 58.4kW Low-NOx Condensing LPG Gas Water Heater — the compact, energy-efficient solution for commercial and industrial applications.
Part of the next-generation Rinnai N Series, this internal wall-mounted model combines Low-NOx technology, stainless steel construction and intelligent modulation for maximum energy efficiency, reliability and future-proof performance.
With a 13:1 turndown ratio, the 1600i delivers precise temperature control and reduced emissions, up to 37 litres per minute of hot water at ±1°C accuracy. Install as a single unit or cascade for large systems, with zero storage heat loss and whisper-quiet operation.
Key Features & Benefits
- 58.4kW high-efficiency output – Up to 37 litres per minute of temperature-accurate hot water on demand.
- Low-NOx condensing technology – Advanced burner system keeps emissions under 20ppm for a cleaner, greener installation.
- 13:1 turndown ratio – Automatically adjusts to meet demand, minimises energy consumption and running costs.
- Stainless steel heat exchanger – Corrosion-resistant design with up to 12-year warranty for long-term reliability.
- BioLPG-ready – Compatible with low-carbon LPG blends for future energy compliance.
- Powerful fan motor – Flue runs up to 46m using Rinnai’s 80/125 concentric flue system.
- Compact internal design – 29kg unit for wall mounting or cascade frame installation.
- Zero storage, zero heat loss – On-demand performance eliminates standby energy waste.
- Quiet operation – 41 dB(A), ideal for indoor commercial use.
- Advanced safety features – EN26 compliant with automatic temperature and exhaust protection.
Ideal For
- Hotels, restaurants, gyms
- Care homes and healthcare facilities
- Food production and process industries
- Commercial kitchens and wash-down systems
- Renewable-ready hot water systems (solar & heat pump boosters)
Why Buy
The Rinnai 1600i(N) is the standard for commercial condensing gas water heating — instant, precise and efficient hot water with ultra-low emissions. Modular design, advanced burner system and stainless steel construction makes it a future-proof choice for any business that wants performance, reliability and compliance.
Meet your hot water demands efficiently and safely — add the Rinnai 1600i Internal Low-NOx LPG Water Heater to your basket today or contact us for expert installation advice.
*Please note this water heater includes an easy to fit LPG conversion kit, allowing you to seamlessly switch between natural gas and liquid petroleum gas for uninterrupted hot water.
Rinnai 1600i Internal 58.4kW Low-NOx LPG Condensing Gas Water Heater Specification
Oversized item (delivered on a pallet)
| Brand |
Rinnai |
| Model |
Rinnai 1600i(N) – W1600i(N) |
| Mounting |
Internal wall-mounted or cascade frame |
| Gas Type |
LPG (BioLPG Ready) – includes Natural Gas conversion kit |
| Heat Output |
58.4kW |
| Flow Rate |
1.5 – 37 litres per minute (with flow booster option) |
| Temperature Range |
40, 42, 50, 55, 60, 65, 75, 85°C |
| Temperature Accuracy |
±1°C of set point |
| Turndown Ratio |
13:1 |
| Heat Exchanger |
Stainless Steel |
| Low NOx Emissions |
Less than 20ppm |
| Gas Consumption |
LPG: 4.2kg/h | Natural Gas: 5.6m³/h |
| Exhaust Type |
Internal – Forced Room Sealed (Concentric) |
| Flue Run Capability |
Up to 46m (80/125 concentric flue system) |
| Booster Function |
Yes (with ≥3 bar dynamic pressure & ≤40°C set point) |
| Minimum Operating Pressure |
1.0 bar |
| Noise Level |
41 dB(A) |
| Weight |
29kg |
| Connections |
3/4" BSP Male (Gas – Water Inlet – Water Outlet) |
| Electrical Supply |
230V AC, 50Hz, 1ph |
| Standards |
EN26 Compliant |
| Safety Features |
Water temperature shut-off, exhaust temperature sensor |
| Suitable Applications |
Hotels, gyms, restaurants, healthcare, food production & industrial use |
| Dimensions (H × W × D) |
670mm × 470mm × 222mm |
| Warranty |
1 Year Labour & 3 Years Parts (Up to 12 Years with Rinnai Commissioning & Servicing) |
| Product Type |
Internal Condensing LPG Water Heater |
