Rinnai N1300e 47 kW External Natural Gas Water Heater | Low-NOx

Rinnai N1300e Natural Gas water heater

The Rinnai N1300e 47 kW External Natural Gas Water Heater is a commercial continuous-flow water heating solution designed for installations requiring reliable, temperature-controlled hot water.

Part of the Rinnai N Series, the N1300e combines 47 kW nominal gas input, approximately 45 kW output, Low-NOx burner technology, a stainless-steel primary heat exchanger and a 13:1 turndown ratio. Rinnai specifies a maximum water flow of up to 35 L/min, depending on operating conditions.

The external configuration helps save valuable indoor plant-room space and makes the N1300e suitable for professionally designed commercial hot-water installations.

Key Features

• 47 kW Natural Gas water heater
• Rinnai N1300e commercial model
• External installation
• Continuous-flow hot-water production
• Up to 35 L/min water flow
• Low-NOx burner technology
• Stainless-steel primary heat exchanger
• 13:1 turndown ratio
• Automatic output modulation
• Temperature-accurate hot-water delivery
• Cascade capability
• Direct forced-exhaust flue system
• Suitable for commercial hot-water applications
• Rinnai N Series technology

47 kW Commercial Natural Gas Water Heater

The Rinnai N1300e is designed for commercial applications where hot-water demand can vary throughout the day.

The appliance has a 47 kW nominal Natural Gas input and approximately 45 kW nominal output. Rinnai specifies up to 35 L/min maximum water flow, subject to the incoming water temperature, required outlet temperature, water pressure and other installation conditions.

This makes the N1300e suitable for professionally designed commercial hot-water systems where continuous-flow operation is preferred over relying entirely on a large storage tank.

Up to 35 L/min Hot-Water Flow

The Rinnai N1300e can deliver up to 35 litres of hot water per minute.

Actual flow depends on the temperature rise and installation conditions.

Important factors include:

• Incoming cold-water temperature
• Required hot-water temperature
• Available water pressure
• Gas supply
• Hot-water demand
• System configuration

Rinnai also specifies approximately 775 litres per hour at a 50°C temperature rise for the N1300e.

Low-NOx Commercial Water Heating

The N1300e incorporates Rinnai’s Low-NOx burner technology.

This technology is designed to reduce nitrogen oxide emissions while maintaining the performance required for commercial continuous-flow hot-water production.

Rinnai’s current technical documentation lists NOx emissions of approximately 26 mg/kWh for the N1300 range.

Stainless-Steel Primary Heat Exchanger

The N Series uses a stainless-steel primary heat exchanger.

Rinnai states that the stainless-steel heat exchanger is designed to increase durability while supporting the performance of its commercial continuous-flow water-heating systems.

13:1 Turndown Ratio

The Rinnai N1300e features a 13:1 turndown ratio.

The appliance can modulate its output according to hot-water demand rather than operating continuously at maximum capacity. This makes the technology particularly useful for commercial buildings where demand can change throughout the day.

External Installation

The N1300e is designed for external installation.

Rinnai identifies the N1300e as the externally mounted version of its 1300 commercial water-heater range, with the model reference REU-N2635WC.

External installation can help preserve valuable internal plant-room space.

Installation must comply with the manufacturer’s instructions and all applicable gas, water, electrical, flue and building regulations in the country of installation.

Natural Gas Configuration

This product is intended for a Natural Gas installation.

Rinnai’s technical documentation identifies Natural Gas G20 among the supported gas configurations for the N1300 series. The exact gas category and pressure requirements must be checked against the appliance data plate and the destination country’s requirements.

A qualified gas engineer must confirm that the available gas supply is suitable before installation.

Cascade Commercial Hot-Water Systems

The Rinnai N1300e can be used as part of a cascade hot-water system.

Multiple Rinnai N Series water heaters can be connected where a single appliance does not provide sufficient peak capacity. Rinnai states that its N Series can be cascaded to supply larger hot-water demands.

Cascade systems can be considered for larger:

• Hotels
• Leisure facilities
• Healthcare premises
• Restaurants
• Commercial kitchens
• Educational buildings
• Industrial premises
• Accommodation facilities

The number of units required should be determined through professional hot-water system design.

Temperature-Accurate Hot Water

Rinnai states that its N Series can deliver temperature-controlled hot water with accuracy of approximately ±1°C from the heater set point.

This can be particularly important in commercial environments where consistent hot-water temperature is required.

Commercial Applications

The Rinnai N1300e can be considered for professionally designed hot-water systems in:

• Hotels and hospitality
• Restaurants
• Cafés
• Commercial kitchens
• Gyms
• Leisure centres
• Healthcare facilities
• Schools
• Student accommodation
• Commercial accommodation
• Food-service businesses
• Industrial premises
• Agricultural buildings
• Other high-demand commercial applications

The appropriate system capacity should always be determined from peak hot-water demand and required temperature rise.

Technical Specifications

Technical specifications should be checked against the latest manufacturer documentation and the exact appliance configuration before installation.

Rinnai N1300e vs N1300i

The Rinnai N Series 1300 range includes internal and external installation options.

The N1300e is designed for external installation, while the N1300i is designed for internal installation. Both are based around the same 47 kW-class commercial continuous-flow platform.

Choose the N1300e when an external installation is appropriate and available space, flue design and local regulations support the configuration.

Choose the N1300i when the project requires an internal water-heater installation.

Rinnai N1300e for European Commercial Projects

The Rinnai N1300e is suitable for consideration in European commercial hot-water projects where a Natural Gas continuous-flow system is appropriate.

Its combination of 47 kW input, up to 35 L/min flow, Low-NOx technology, external installation, stainless-steel heat exchanger and cascade capability makes it a strong option for professionally designed commercial hot-water systems.

EuroFuelSupply supplies heating, hot-water and energy products to customers across supported European markets.

For commercial developments, multiple-unit installations or trade requirements, contact EuroFuelSupply for availability and project enquiries.

Professional Installation

The Rinnai N1300e is a commercial gas appliance.

Installation, commissioning, servicing and any gas-system work must be completed by appropriately qualified professionals.

Before ordering, the installer should confirm:

• Natural Gas availability
• Gas supply capacity
• Required gas pressure
• Peak hot-water demand
• Incoming water temperature
• Required hot-water temperature
• Water pressure
• Flue arrangement
• Condensate drainage
• External installation requirements
• Electrical supply
• Local gas regulations
• Building regulations
• Whether a cascade system is required

Do not attempt to install, convert or commission the appliance without the appropriate professional qualifications.

Frequently Asked Questions

What is the Rinnai N1300e?

The Rinnai N1300e is an externally mounted commercial continuous-flow gas water heater in the Rinnai N Series.

How powerful is the Rinnai N1300e?

The N1300e has a 47 kW nominal Natural Gas input and approximately 45 kW nominal output.

What is the N1300e flow rate?

The Rinnai N1300e can deliver up to 35 L/min, depending on operating conditions.

How much water does the N1300e produce at a 50°C temperature rise?

Rinnai specifies approximately 775 litres per hour at a 50°C temperature rise for the N1300e.

Is the Rinnai N1300e a Natural Gas water heater?

Yes. The N1300e is available in Natural Gas and LPG configurations. This particular product should be presented specifically as the Natural Gas configuration.

Is the Rinnai N1300e Low-NOx?

Yes. The N Series incorporates Rinnai Low-NOx burner technology. The current technical specification lists approximately 26 mg/kWh NOx for the N1300 range.

Can the N1300e be installed outside?

Yes. The N1300e is the external version of the Rinnai N Series 1300 commercial water heater.

Can multiple N1300e units be installed together?

Yes. Rinnai supports cascade configurations for higher commercial hot-water demand.

Is the N1300e suitable for hotels and restaurants?

It can be suitable for professionally designed commercial hot-water systems in hospitality, food service, leisure and other commercial environments, provided the system is correctly sized.

What is the Rinnai N1300e model number?

The Rinnai technical documentation identifies the external N1300e as REU-N2635WC.

Does the N1300e have a stainless-steel heat exchanger?

Yes. Rinnai identifies a stainless-steel primary heat exchanger as one of the key features of the N Series.

Does the N1300e require professional installation?

Yes. It is a commercial gas appliance and must be installed and commissioned by appropriately qualified professionals in accordance with manufacturer instructions and local regulations.