Rinnai N1300i 47 kW Internal Condensing Gas Water Heater

Rinnai N1300i gas water heater

The Rinnai N1300i 47 kW Internal Condensing Gas Water Heater is a commercial continuous-flow water heating solution designed for buildings with demanding and variable hot-water requirements.

Part of the Rinnai N Series, the N1300i is designed for internal installation and combines condensing technology, a stainless-steel primary heat exchanger, Low-NOx burner technology and automatic output modulation.

The appliance can deliver up to 35 litres per minute, while Rinnai specifies approximately 775 litres per hour at a 50°C temperature rise for the N1300 range. Actual flow depends on incoming water temperature, required outlet temperature, water pressure and installation conditions.

Key Features

• Rinnai N1300i commercial gas water heater
• 47 kW nominal gas input
• Approximately 45 kW nominal output under specified natural-gas conditions
• Up to 35 L/min maximum water flow
• Approximately 775 L/h at a 50°C temperature rise
• Condensing instantaneous water heating
• Internal wall-mounted installation
• Forced room-sealed flue system
• Stainless-steel primary heat exchanger
• Low-NOx burner technology
• 13:1 turndown ratio
• Automatic output variation
• Direct electronic ignition
• Commercial continuous-flow operation
• Cascade capability
• Class A water-heating efficiency
• XL load profile
• Compact commercial installation
• Suitable for appropriately specified European commercial projects

Rinnai N1300i 47 kW Commercial Water Heater

The Rinnai N1300i 47 kW gas water heater is designed for commercial applications where hot-water demand can vary throughout the day.

Unlike a conventional storage water heater, the N1300i heats water as demand occurs. This continuous-flow configuration can be useful for commercial buildings where hot-water demand is intermittent or where a large integrated storage tank is not the preferred system configuration.

Potential applications include:

• Hotels
• Restaurants
• Commercial kitchens
• Cafés
• Gyms
• Leisure centres
• Sports facilities
• Care facilities
• Schools
• Apartment developments
• Holiday accommodation
• Healthcare facilities
• Commercial washrooms
• Food-production premises
• Industrial buildings

Correct system sizing should always be based on calculated peak hot-water demand.

Up to 35 L/min Hot-Water Flow

The Rinnai N1300i can provide up to 35 L/min under specified operating conditions.

This makes the N1300i relevant to searches for:

• Rinnai N1300i 35 L/min
• 35 L/min commercial water heater
• Rinnai 47 kW gas water heater
• commercial continuous-flow water heater
• high-output gas water heater

The maximum flow should not be interpreted as a fixed output under every operating condition.

Actual hot-water flow depends on:

• Incoming cold-water temperature
• Required outlet temperature
• Available water pressure
• Gas supply
• Temperature rise
• System configuration
• Number of simultaneous outlets

For standardized commercial comparison, the N1300 range is specified at approximately 775 L/h at a 50°C temperature rise.

Condensing Gas Water Heating

The Rinnai N1300i uses condensing water-heating technology to recover additional heat from the combustion process.

The appliance is designed to provide continuous-flow hot water while automatically adjusting its output according to demand.

This makes the N1300i particularly relevant to commercial projects where variable hot-water demand needs to be matched by a modulating gas water heater.

Stainless-Steel Heat Exchanger

The N1300i incorporates a stainless-steel primary heat exchanger.

The stainless-steel heat exchanger is a key component of the Rinnai N Series commercial water-heating platform and is designed for continuous-flow operation.

13:1 Turndown Ratio

The Rinnai N1300i features a 13:1 turndown ratio.

The appliance can automatically vary its output according to hot-water demand rather than operating continuously at maximum input.

This modulation capability is particularly relevant to commercial buildings where demand can change throughout the day.

Low-NOx Gas Water Heater

The Rinnai N1300i incorporates Low-NOx burner technology.

Rinnai’s technical documentation specifies approximately 26 mg/kWh NOx under the relevant test conditions.

This makes Low-NOx performance an important specification for commercial projects where combustion-emission requirements form part of the equipment selection.

Applicable local and national requirements should always be confirmed before installation.

Internal Installation

The Rinnai N1300i is designed for internal installation.

The appliance uses a forced room-sealed flue arrangement, allowing combustion air and exhaust gases to be managed through the approved flue system.

The installation should be assessed by a suitably qualified professional before purchase.

Important installation considerations include:

• Gas supply
• Gas pressure
• Flue routing
• Flue termination
• Condensate drainage
• Water connections
• Electrical supply
• Appliance clearances
• Commissioning requirements
• Applicable national regulations

Commercial Cascade Installation

One of the key features of the Rinnai N Series is cascade capability.

Where a single N1300i does not provide sufficient capacity for the calculated peak demand, multiple compatible Rinnai water heaters can be installed as part of a correctly designed cascade system.

Cascade systems can be considered for:

• Large hotels
• Apartment developments
• Healthcare facilities
• Leisure centres
• Large commercial kitchens
• Industrial facilities
• High-occupancy buildings
• Large hospitality properties

The required number of appliances should be determined by a professional hot-water demand calculation.

Natural Gas and LPG Configurations

The Rinnai N Series is available in applicable gas configurations depending on the specific model, market and appliance setup.

For the N1300i, customers should confirm the exact gas configuration supplied before ordering.

Do not assume that a single N1300i appliance automatically operates on both natural gas and LPG.

The gas type, gas pressure and appliance configuration must match the manufacturer’s specification for the destination market.

Hydrogen-Blend and BioLPG Compatibility

Rinnai identifies applicable N Series appliances as being prepared for certain alternative fuel configurations, including hydrogen-blend and BioLPG applications, subject to the relevant appliance configuration, fuel standard and installation requirements.

Customers should verify compatibility against the exact appliance documentation and destination-country requirements before specifying alternative fuels.

Technical Specifications

Rinnai N1300i vs Rinnai N1300e

The N1300i and N1300e are closely related Rinnai 1300-series commercial water heaters, but their installation configurations are different.

Rinnai N1300i

• Internal installation
• Forced room-sealed flue
• Manufacturer reference REU-N2635FFC
• Commercial continuous-flow operation
• Designed for internal installations

Rinnai N1300e

• External installation
• Direct forced exhaust
• Manufacturer reference REU-N2635WC
• Designed for external mounting

Both belong to the Rinnai N1300 range and are specified for high-volume commercial hot-water applications.

The correct version depends primarily on the intended installation location and project requirements.

Rinnai N1300i vs N1600i

The Rinnai N1600i is the higher-capacity internal model within this N Series comparison.

The N1300i is specified at approximately 775 L/h at a 50°C temperature rise, while the N1600i is specified at approximately 954 L/h at the same temperature rise. The N1300i also has an XL load profile, while the N1600i has an XXL load profile.

For larger calculated hot-water demand, customers can compare the N1600i or a suitable cascade arrangement.

The correct model should always be selected based on actual project demand rather than nominal power alone.

Is the Rinnai N1300i a Commercial Water Heater?

Yes. The N1300i is designed as a commercial continuous-flow gas water heater.

Its 47 kW nominal input, up to 35 L/min flow, modulation, Low-NOx combustion, stainless-steel heat exchanger and cascade capability make it suitable for appropriately sized commercial hot-water installations.

Does the Rinnai N1300i Have a Storage Tank?

No.

The N1300i is an instantaneous condensing water heater. It heats water as demand occurs instead of storing a large volume of hot water inside an integrated cylinder.

What Is the Rinnai N1300i Flow Rate?

The maximum published flow is up to 35 L/min under specified operating conditions.

Rinnai also specifies approximately 775 L/h at a 50°C temperature rise for the N1300 range.

Actual flow depends on the incoming water temperature, desired outlet temperature, water pressure and installation conditions.

What Is the Rinnai N1300i Power Rating?

The N1300i has a 47 kW nominal gas input and approximately 45 kW nominal output under the specified natural-gas conditions.

For technical specification and system sizing, the manufacturer’s current documentation should take precedence over simplified marketing descriptions.

Can Rinnai N1300i Units Be Cascaded?

Yes.

The N1300i supports cascade configurations, allowing multiple compatible units to work together where a single appliance is insufficient for the calculated hot-water demand.

Cascade design should be carried out according to Rinnai’s current technical instructions and the requirements of the project.

Is the N1300i Suitable for Hotels and Restaurants?

The N1300i can be considered for appropriately sized commercial applications such as hotels, restaurants, commercial kitchens, leisure facilities, care facilities and other buildings with significant hot-water demand.

The number of outlets and simultaneous demand should be assessed before selecting the appliance.

Professional Installation

The Rinnai N1300i is a commercial gas appliance and should be installed, commissioned and serviced by an appropriately qualified professional.

Installation must follow the manufacturer’s instructions and all applicable requirements for:

• Gas installation
• Flue systems
• Condensate drainage
• Water connections
• Electrical installation
• Appliance clearances
• Ventilation and combustion requirements
• Commissioning
• Servicing

Requirements vary by European country, so the installation should be checked against the regulations applicable at the destination.

Buy Rinnai N1300i 47 kW Gas Water Heater in Europe

The Rinnai N1300i 47 kW Internal Condensing Gas Water Heater is designed for European commercial projects requiring high-volume continuous-flow hot water.

EuroFuelSupply supplies heating and water-heating equipment for residential, trade and commercial requirements across European markets.

For larger projects, installers, developers and commercial buyers can provide the required quantity, destination country and hot-water requirements when requesting a quotation.

Choose the Rinnai N1300i based on calculated demand, gas configuration, installation location, water temperature requirements and applicable local regulations.