Rinnai N1600e 58.4 kW External Natural Gas Water Heater | Low-NOx

Rinnai N1600e Natural Gas water heater

The Rinnai N1600e 58.4 kW External Natural Gas Water Heater is a commercial continuous-flow water heating solution designed for professionally engineered hot-water systems.

Part of the Rinnai N Series, the N1600e combines condensing instantaneous water-heating technology, automatic output variation, Low-NOx combustion and a stainless-steel primary heat exchanger. Rinnai identifies the external model as N1600e (REU-N3237WC). (rinnai-uk.co.uk)

The external configuration is designed for outdoor installation and uses a direct forced-exhaust flue system. (rinnai-uk.co.uk)

Key Features

• Rinnai N1600e commercial water heater
• 58 kW-class gas water heater
• Natural Gas configuration
• External installation
• Condensing instantaneous operation
• Automatic output variation
• Low-NOx burner technology
• Stainless-steel primary heat exchanger
• 13:1 turndown ratio
• Direct electronic ignition
• Direct forced-exhaust flue system
• Continuous-flow hot-water production
• Cascade capability
• Commercial high-demand hot-water applications
• Manufacturer model reference REU-N3237WC (rinnai-uk.co.uk)

58.4 kW-Class Commercial Natural Gas Water Heater

The Rinnai N1600e is designed for commercial applications where a substantial supply of hot water is required.

Its continuous-flow design heats water as demand occurs rather than relying on a large integrated storage tank.

Rinnai identifies the N1600 as a condensing instantaneous water heater with automatic output variation. The N1600 range is also specified at approximately 954 L/h at a 50°C temperature rise. (rinnai-uk.co.uk)

Actual hot-water performance depends on incoming water temperature, required outlet temperature, water pressure, gas supply and installation conditions.

External Installation

The Rinnai N1600e is designed for external installation.

Rinnai’s documentation clearly distinguishes the N1600e from the internal N1600i:

• N1600e: External
• N1600i: Internal

The N1600e uses a direct forced-exhaust flue system. (rinnai-uk.co.uk)

An external configuration can help preserve indoor plant-room space and may be useful for commercial projects where outdoor appliance installation is appropriate.

The installation must comply with the manufacturer’s instructions and the gas, building, electrical, water and safety regulations applicable in the destination country.

Natural Gas Commercial Water Heating

This EuroFuelSupply product is positioned specifically for Natural Gas applications.

Rinnai’s technical documentation includes G20 Natural Gas specifications for the N1600e. The gas supply must be checked by the qualified installer to ensure that pressure, pipework and available capacity are suitable for the appliance. (rinnai-uk.co.uk)

Before ordering, confirm:

• Natural Gas availability
• Gas supply capacity
• Gas pressure
• Appliance configuration
• Installation requirements
• Local regulations

Low-NOx Water Heating

The N1600e incorporates Low-NOx burner technology.

Low-NOx combustion is an important consideration for commercial gas-fired hot-water systems where applicable emissions requirements need to be considered.

The exact emissions performance should always be checked against the latest Rinnai specification for the appliance configuration being installed.

Condensing Continuous-Flow Operation

The Rinnai N1600e is part of Rinnai’s commercial condensing instantaneous water-heater range.

Its automatic output variation allows the appliance to respond to changing hot-water demand instead of simply operating continuously at maximum output. (rinnai-uk.co.uk)

Actual efficiency and system performance depend on operating temperatures, water demand and the overall system design.

Stainless-Steel Heat Exchanger

The N1600e uses a stainless-steel primary heat exchanger.

The stainless-steel heat exchanger forms part of the N Series commercial water-heating design and is intended for demanding continuous-flow applications.

13:1 Turndown Ratio

The Rinnai N Series incorporates a 13:1 turndown ratio.

This allows the water heater to modulate its operation across a broad demand range.

For commercial premises where hot-water requirements change throughout the day, modulation can help the appliance respond to actual demand rather than continuously operating at maximum output.

High-Volume Hot-Water Production

The N1600 range is designed for high-demand commercial hot-water applications.

Rinnai documentation specifies approximately 954 L/h at a 50°C temperature rise for the N1600 range. (rinnai-uk.co.uk)

Actual flow depends on:

• Incoming water temperature
• Required outlet temperature
• Water pressure
• Gas supply
• Appliance configuration
• Installation conditions

For this reason, commercial systems should be sized according to actual peak hot-water demand rather than relying only on a maximum flow figure.

Cascade Commercial Hot-Water Systems

Multiple Rinnai N Series water heaters can be configured in cascade systems when a single appliance does not provide sufficient peak capacity.

Rinnai states that N Series water heaters can be cascaded to meet larger hot-water requirements. (rinnai-uk.co.uk)

Cascade systems can be considered for larger:

• Hotels
• Restaurants
• Commercial kitchens
• Leisure facilities
• Healthcare premises
• Food-production facilities
• Brewing operations
• Industrial sites
• Commercial accommodation

The number of appliances required should be determined through professional system design.

Flue System

The N1600e uses a direct forced-exhaust flue system.

This is one of the main installation differences between the N1600e external model and N1600i internal model. (rinnai-uk.co.uk)

The flue arrangement must be designed and installed according to the current Rinnai installation instructions and applicable local regulations.

Rinnai also specifies the N1600 range with a powerful fan system designed to provide flexibility for flue arrangements.

Commercial Applications

The Rinnai N1600e can be considered for professionally designed commercial hot-water systems including:

• Hotels
• Restaurants
• Bars
• Commercial kitchens
• Gyms
• Leisure centres
• Healthcare facilities
• Food production
• Brewing
• Farming
• Industrial premises
• Commercial accommodation
• Other high-demand hot-water installations

The correct system size should always be determined from the project’s peak hot-water demand and required temperature rise.

Technical Specifications

Technical specifications should be checked against the latest manufacturer documentation and exact appliance configuration before installation. (rinnai-uk.co.uk)

Rinnai N1600e vs N1600i

The Rinnai N1600e and N1600i are closely related commercial water heaters, but they are designed for different installation environments.

Rinnai N1600e

• External installation
• Direct forced exhaust
• Model reference REU-N3237WC

Rinnai N1600i

• Internal installation
• Forced room-sealed flue
• Model reference REU-N3237FFC

Rinnai’s technical documentation clearly differentiates the two models. (rinnai-uk.co.uk)

Choose the N1600e when external installation is appropriate and permitted by the project design and local regulations.

Rinnai N1600e for European Commercial Projects

The Rinnai N1600e 58.4 kW Natural Gas Water Heater is suitable for consideration in European commercial hot-water projects requiring an external continuous-flow gas water heater.

Its combination of:

• External installation
• Condensing operation
• Low-NOx technology
• Automatic output variation
• Stainless-steel heat exchanger
• 13:1 turndown
• Commercial capacity
• Cascade capability

makes it suitable for professionally designed high-demand hot-water systems.

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

For commercial developments, installers, developers and multi-unit projects, contact EuroFuelSupply for availability and project enquiries.

Professional Installation

The Rinnai N1600e is a commercial gas appliance.

Installation, commissioning and servicing must be completed by appropriately qualified professionals.

Before purchasing, the installer should confirm:

• Natural Gas supply
• Gas pressure
• Gas supply capacity
• Peak hot-water demand
• Incoming cold-water temperature
• Required hot-water temperature
• Water pressure
• Flue arrangement
• External installation requirements
• Electrical supply
• Applicable gas regulations
• Building regulations
• Cascade requirements

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

Frequently Asked Questions

What is the Rinnai N1600e?

The Rinnai N1600e is an external commercial condensing instantaneous gas water heater in the Rinnai N Series.

What is the Rinnai N1600e model number?

Rinnai’s technical documentation identifies the N1600e as REU-N3237WC. (rinnai-uk.co.uk)

Is the Rinnai N1600e a Natural Gas water heater?

Yes. The N1600e documentation includes G20 Natural Gas specifications. (rinnai-uk.co.uk)

Is the Rinnai N1600e Low-NOx?

Yes. The N Series incorporates Low-NOx burner technology.

Is the Rinnai N1600e an external water heater?

Yes. The N1600e is specifically designed for external installation. (rinnai-uk.co.uk)

What is the N1600e flow rate?

The N1600 range is specified at approximately 954 L/h at a 50°C temperature rise. Actual flow depends on the operating conditions and system design. (rinnai-uk.co.uk)

Does the N1600e use a storage tank?

No. It is a continuous-flow or instantaneous water heater that heats water as demand occurs.

Can multiple N1600e units be cascaded?

Yes. Rinnai supports cascade configurations for larger commercial hot-water requirements. (rinnai-uk.co.uk)

What type of flue does the N1600e use?

The N1600e uses a direct forced-exhaust flue system. (rinnai-uk.co.uk)

Is the N1600e suitable for hotels and restaurants?

It can be considered for professionally designed commercial hot-water systems in hotels, restaurants, commercial kitchens, leisure facilities and other high-demand applications.

Does the N1600e require professional installation?

Yes. Gas, water, flue and electrical work must be installed and commissioned by appropriately qualified professionals in accordance with the manufacturer’s instructions and local regulations.