Rinnai Zen 35kW LPG Combi Boiler

Rinnai Zen 35kW LPG Combi Boiler

The Rinnai Zen 35kW LPG Combi Boiler is a compact wall-mounted condensing combination boiler designed to provide central heating and instantaneous domestic hot water from a single appliance.

Using LPG fuel, the Zen 35 combines high-efficiency condensing technology with smart Wi-Fi controls, flexible indoor or outdoor installation and powerful domestic hot-water performance. It is a practical solution for properties where LPG is required and where space-saving heating equipment is preferred.

The Zen 35 model is identified in Rinnai technical documentation as REB-KBI3535FF, with LPG operation using G30. The technical documentation specifies a maximum central-heating input of approximately 34.88kW on the LPG configuration.

Key Features

• Rinnai Zen 35kW LPG combi boiler
• Rinnai Zen 35 model
• Condensing combination boiler
• LPG / G30 fuel configuration
• Central heating and instantaneous domestic hot water
• Compact wall-mounted design
• Indoor or outdoor installation
• Wi-Fi-enabled smart heating controls
• Rinnai ME controller
• Mobile app compatibility
• Built-in weather compensation
• Fast heating mode
• Domestic hot-water pre-heat function
• Integrated eco function
• Energy monitoring
• No separate hot-water storage cylinder required
• 60/100 coaxial condensing flue configuration
• Stainless-steel heat exchanger
• Low-NOx combustion technology

EuroFuelSupply’s existing Zen 35 product information confirms the boiler’s indoor/outdoor installation capability, instant hot water, Wi-Fi controls, weather compensation, pre-heat functionality and compact design.

LPG Heating for Properties Without Mains Natural Gas

The Rinnai Zen 35 LPG is designed for heating applications where LPG is the available gas fuel.

This makes it particularly relevant for properties located away from mains natural-gas networks, including rural homes, developments and other installations where LPG heating is preferred.

The Rinnai technical documentation lists the Zen 35’s LPG combustion parameters under G30, including a maximum/minimum central-heating input of approximately 34.88kW / 8.1kW and an LPG gas flow of approximately 1.051 / 0.244m³/h.

The appliance must be configured, installed and commissioned for the correct gas type in accordance with the manufacturer’s instructions.

Condensing Boiler Technology

The Rinnai Zen 35 uses condensing technology to recover additional heat from the combustion process.

This helps the boiler operate efficiently, particularly when connected to a suitably designed lower-temperature heating system.

The Zen design combines heating and domestic hot-water functions in one compact appliance, reducing the need for separate hot-water storage equipment.

Instantaneous Domestic Hot Water

The Rinnai Zen 35 is a combination boiler, meaning it can provide domestic hot water directly rather than relying on a separate hot-water cylinder.

Water is heated as it passes through the appliance, making the Zen 35 suitable for properties where space is limited and instantaneous hot water is preferred.

EuroFuelSupply’s existing Zen 35 information specifically describes the appliance as providing instant hot water without requiring a storage tank.

Smart Wi-Fi Controls

The Rinnai Zen 35 is designed with smart heating control functionality.

The Rinnai ME controller provides heating control through Wi-Fi and compatible mobile applications. The system also includes functions designed to help users manage heating schedules and energy consumption.

Features include:

• Wi-Fi connectivity
• Mobile app control
• Room thermostat functionality
• Energy monitoring
• Eco mode
• Smart heating management
• Weather compensation

These features can make the Zen 35 a suitable option for customers looking for a modern LPG heating system with connected controls.

Indoor or Outdoor Installation

One of the major advantages of the Rinnai Zen range is installation flexibility.

The Zen 35 can be configured for indoor or outdoor installation, subject to the manufacturer’s installation requirements and applicable local regulations.

Its compact wall-mounted construction makes it suitable for installations where internal boiler space is restricted.

For external installations, the appropriate flue configuration, protection and installation procedures must be followed.

Low-NOx LPG Combustion

The Rinnai Zen 35 uses modern low-emission combustion technology.

Rinnai’s technical documentation gives the LPG Zen 35 a central-heating NOx value of approximately 120mg/kWh at maximum input at 80/60°C, with a lower-load figure of approximately 55mg/kWh at 30% input with a 30°C return temperature.

These figures should be treated as technical manufacturer data rather than a general claim about every installation, as actual performance depends on configuration, commissioning and operating conditions.

Compact Heating Solution

The Zen 35 provides heating and hot water from a single wall-mounted appliance.

Rinnai’s installation documentation gives the Zen 35 appliance dimensions at approximately 660mm high × 440mm wide, with a model-specific depth of approximately 315mm for the REB-KBI3535FF configuration.

This compact footprint can be useful for homes, apartments and other properties where installation space is limited.

Rinnai Zen 35 LPG Technical Specifications

Technical figures are based on the available Rinnai Zen technical and installation documentation. Gas type, installation configuration, flue arrangement and commissioning must comply with the manufacturer’s requirements and local regulations.

Suitable Applications

The Rinnai Zen 35 LPG combi boiler can be considered for:

• LPG-heated homes
• Rural properties
• Properties without mains natural gas
• Medium-sized residential properties
• Flats and apartments
• Properties requiring instantaneous hot water
• Heating upgrades and boiler replacement projects
• Installations where outdoor mounting is preferred
• Properties where boiler space is limited
• Residential and selected light-commercial applications subject to system design

Why Choose the Rinnai Zen 35 LPG?

The Rinnai Zen 35 LPG combines several features in one compact appliance:

• LPG operation
• 35kW-class heating capacity
• Condensing boiler technology
• Instant domestic hot water
• Wi-Fi smart controls
• Indoor or outdoor installation
• Weather compensation
• Fast heating mode
• Hot-water pre-heat function
• Compact wall-mounted design
• No separate hot-water cylinder required

It is particularly relevant for customers looking for a modern LPG boiler where mains natural gas is unavailable or LPG is the preferred fuel.

Rinnai Zen 35 LPG FAQ

What is the Rinnai Zen 35 LPG?

The Rinnai Zen 35 LPG is a wall-mounted condensing combination boiler designed to provide central heating and instantaneous domestic hot water using LPG.

What LPG does the Rinnai Zen 35 use?

The Rinnai technical documentation specifies G30 LPG operating parameters for the REB-KBI3535FF Zen 35 configuration.

Is the Rinnai Zen 35 an LPG combi boiler?

Yes. The Zen 35 can provide central heating and instantaneous domestic hot water from one compact combination boiler.

Is the Rinnai Zen 35 really 35kW?

The Zen 35 is marketed as a 35kW model. For the LPG configuration, Rinnai’s technical documentation specifies a maximum central-heating input of approximately 34.88kW, rather than exactly 35.00kW.

Does the Rinnai Zen 35 LPG require a hot-water cylinder?

No. As a combination boiler, it heats domestic hot water instantaneously rather than requiring a separate storage cylinder.

Can the Rinnai Zen 35 LPG be installed outdoors?

Yes. The Zen range is designed for indoor or outdoor installation, subject to the manufacturer’s installation requirements and applicable local regulations.

Does the Rinnai Zen 35 LPG have Wi-Fi?

Yes. The Zen range includes Wi-Fi-enabled controls and Rinnai ME smart-control functionality.

What are the dimensions of the Rinnai Zen 35 LPG?

The Rinnai installation documentation lists the Zen 35 at approximately 660mm high × 440mm wide, with approximately 315mm depth for the REB-KBI3535FF model.

Who is the Rinnai Zen 35 LPG suitable for?

It is particularly suitable for properties using LPG where a compact condensing combi boiler with instant hot water and smart controls is required.

Where can I buy the Rinnai Zen 35 LPG Combi Boiler?

EuroFuelSupply supplies heating and energy products across Europe and accepts residential, trade, installer, developer, retailer and wholesale enquiries. Customers can provide their delivery country, city, quantity and project requirements when requesting a quotation.