Get on-demand hot water with the Rinnai 1300i Internal 47kW Low-NOx Condensing Natural 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 1300i delivers precise temperature control and reduced emissions, up to 35 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.
The Rinnai 1300i(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 1300i Internal Low-NOx Natural Gas 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.
Oversized item (delivered on a pallet)
| Brand | Rinnai |
|---|---|
| Model | Rinnai 1300i(N) – W1300i(N) |
| Mounting | Internal wall-mounted or cascade frame |
| Gas Type | Natural Gas (Hydrogen blend ready) – includes LPG conversion kit |
| Heat Output | 47kW |
| Flow Rate | 1.5 – 35 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 |
