Ariston E-Combi ONE 24 kW LPG Condensing Combi Boiler

Ariston E-Combi ONE LPG combi boiler

The Ariston E-Combi ONE 24 kW LPG Condensing Combi Boiler is a wall-mounted combination boiler designed to provide central heating and domestic hot water from one compact appliance.

The LPG version delivers up to 21 kW maximum central-heating output and 26 kW maximum domestic hot-water output, with a domestic hot-water flow rate of approximately 10.6 L/min at a 35°C temperature rise.

The E-Combi ONE LPG combines Ariston’s XtraTech stainless steel heat exchanger, 1:7 modulation, Auto function, Comfort function, high-efficiency pump and backlit LCD interface. Ariston lists the 24 LPG model with A/A ErP ratings for heating and domestic hot water.

Key Features

• Ariston E-Combi ONE LPG
• 24 kW-class LPG condensing combi boiler
• 21 kW maximum central-heating output
• 26 kW maximum domestic hot-water output
• 10.6 L/min DHW flow at ΔT35°C
• A-rated heating efficiency
• A-rated domestic hot-water efficiency
• XtraTech stainless steel heat exchanger
• 1:7 modulation ratio
• Auto function
• Comfort function
• High-efficiency pump
• Backlit LCD display
• Integrated 8-litre expansion vessel
• Compatible with Ariston controls and Ariston NET
• LPG configuration
• Wall-mounted design
• Suitable for central heating and domestic hot water

Ariston E-Combi ONE LPG Technical Specifications

Technical values are based on Ariston’s official E-Combi ONE LPG data. The manufacturer lists separate 24 and 30 models, so these specifications should not be transferred to the 30 kW version.

24 kW LPG Condensing Combi Boiler

The E-Combi ONE 24 LPG is a combination boiler designed to provide both space heating and domestic hot water.

The 24 model provides up to 21 kW central-heating output and 26 kW domestic hot-water output. This distinction is important: the “24” in the product name should not be described as a 24 kW maximum heating output.

Ariston’s technical documentation identifies 21 kW as the maximum CH output and 26 kW as the maximum DHW output.

10.6 L/min Domestic Hot Water Flow

The E-Combi ONE LPG 24 provides approximately 10.6 L/min of domestic hot water at ΔT35°C.

Actual flow depends on incoming water temperature, required outlet temperature, water pressure and operating conditions.

This makes the boiler relevant to buyers searching for an Ariston 10 L/min LPG combi boiler or 24 kW LPG combi boiler with domestic hot water.

XtraTech Stainless Steel Heat Exchanger

One of the principal features of the E-Combi ONE is Ariston’s XtraTech stainless steel heat exchanger.

Ariston describes the heat exchanger as having wider waterways and a single-coil design intended to support water flow and heating performance.

For buyers comparing LPG boilers, the stainless steel heat exchanger is an important product specification.

1:7 Modulation

The E-Combi ONE uses a 1:7 modulation ratio.

Modulation allows the boiler to adjust its firing rate according to heating demand rather than continuously operating at maximum output.

Ariston identifies 1:7 modulation as one of the E-Combi ONE’s key technologies.

Auto Function

The E-Combi ONE incorporates an Auto function that monitors heating-system temperature and adjusts boiler operation.

Ariston states that the Auto function reduces peaks in flow temperature and is intended to optimize operating efficiency.

Comfort Function

The E-Combi ONE also includes a Comfort function designed around domestic hot-water availability and user convenience.

The exact operating mode should be configured according to the manufacturer’s instructions and the requirements of the installation.

A-Rated LPG Combi Boiler

The E-Combi ONE LPG 24 is listed with:

• A ErP heating rating
• A ErP domestic hot-water rating
• Approximately 93% seasonal space-heating efficiency
• Approximately 85% water-heating energy efficiency

Ariston’s official technical table gives these values for the 24 LPG model.

Do not describe this as “100% efficient” or promise a specific reduction in an individual customer’s fuel bill.

LPG Fuel Configuration

This product is designed for LPG heating applications.

The E-Combi ONE LPG is available as a dedicated LPG configuration. Ariston’s technical documentation also describes gas-conversion procedures and specific LPG commissioning requirements.

The exact gas category, regulator pressure and commissioning requirements must be verified against the appliance data plate and the installation instructions for the destination country.

Central Heating

The E-Combi ONE 24 LPG can provide up to 21 kW maximum central-heating output.

The boiler supports high-temperature heating operation from approximately 35–82°C, while the specified low-temperature range is approximately 20–45°C.

This makes it suitable for appropriately designed radiator and low-temperature heating systems, subject to system design and installer assessment.

Domestic Hot Water

As a combi boiler, the E-Combi ONE produces domestic hot water without requiring a separate conventional hot-water storage cylinder.

The 24 LPG model provides:

• Up to 26 kW DHW output
• Approximately 10.6 L/min at ΔT35°C
• 2 L/min minimum DHW flow
• 36–60°C DHW temperature range
• XL domestic hot-water load profile

LCD Display and User Controls

The E-Combi ONE includes a large backlit LCD display and user interface.

The display provides operating information and allows the user to manage relevant heating and hot-water settings.

Ariston also states that the boiler can work with compatible Ariston controls and Ariston NET connectivity where the required controls are installed.

Ariston NET Compatibility

Compatible Ariston controls can provide access to Ariston NET, allowing supported heating systems to be managed through the manufacturer’s connected-home platform.

This feature requires compatible controls and the appropriate installation configuration.

Integrated Expansion Vessel

The E-Combi ONE LPG 24 includes an integrated 8-litre expansion vessel.

The expansion vessel forms part of the boiler’s heating-system hydraulic arrangement and must be correctly commissioned according to system requirements.

Compact Wall-Mounted Design

The E-Combi ONE is designed as a wall-mounted combi boiler.

The 24 LPG model has an approximate weight of 29.7 kg, while the manufacturer’s service clearances are approximately 300 mm above, 450 mm in front and 250 mm below, with 5 mm specified at each side.

The installer must follow the current installation manual for actual installation clearances.

Flue and Installation

The E-Combi ONE LPG is a room-sealed condensing boiler with approved flue configurations.

Ariston’s technical documentation identifies multiple boiler/flue types including C13, C23, C33, C43, C53, C63, C83 and C93 configurations depending on the approved installation arrangement.

The correct flue system must be selected according to the boiler model, installation layout and local regulations.

Do not install, extend or modify the flue based solely on information on an online product page.

Suitable Applications

Subject to professional assessment, the Ariston E-Combi ONE LPG can be considered for:

• LPG-heated homes
• Properties away from the mains gas network
• Holiday homes
• Leisure properties
• Static caravans and lodges where the boiler is permitted
• Residential heating systems
• Replacement LPG combi-boiler installations
• Properties requiring central heating and domestic hot water from one appliance

Actual suitability depends on heat-loss calculations, hot-water demand, LPG supply, flue configuration, system design and local regulations.

Ariston E-Combi ONE 24 LPG vs 30 LPG

The E-Combi ONE LPG range includes 24 kW and 30 kW versions.

The 24 LPG model provides:

• 21 kW maximum CH output
• 26 kW maximum DHW output
• 10.6 L/min DHW flow at ΔT35°C

The 30 LPG model provides:

• 27 kW maximum CH output
• 30 kW maximum DHW output
• 12.2 L/min DHW flow at ΔT35°C

Customers should select the model according to the property’s heating requirements and domestic hot-water demand rather than choosing solely by nominal model number.

Why Choose the Ariston E-Combi ONE LPG 24?

Key product characteristics include:

• 21 kW central-heating output
• 26 kW domestic hot-water output
• 10.6 L/min DHW flow
• LPG fuel configuration
• A/A ErP rating
• XtraTech stainless steel heat exchanger
• 1:7 modulation
• Auto function
• Comfort function
• 8-litre expansion vessel
• Backlit LCD display
• Compatible Ariston controls
• Ariston NET compatibility with required controls
• Condensing technology
• Compact wall-mounted format

Professional Installation

The E-Combi ONE LPG is a gas-burning heating appliance and should be installed, commissioned and serviced by a suitably qualified professional.

Before installation, the installer should verify:

• LPG gas category
• LPG supply pressure
• Appliance data plate
• Gas pipe sizing
• Flue configuration
• Flue terminal position
• Condensate drainage
• Heating-system pressure
• Expansion vessel requirements
• Electrical supply
• Required service clearances
• Local gas regulations
• Local building regulations

Ariston’s installation documentation contains specific commissioning procedures for LPG operation.

Frequently Asked Questions

Is the Ariston E-Combi ONE LPG a boiler or water heater?

It is a condensing combi boiler that provides both central heating and domestic hot water. Calling it only a water heater understates its function.

Is the E-Combi ONE available for LPG?

Yes. Ariston produces a dedicated E-Combi ONE LPG version.

What is the heating output of the E-Combi ONE LPG 24?

The maximum central-heating output is 21 kW.

What is the domestic hot-water output?

The maximum DHW output is 26 kW for the 24 LPG model.

What is the hot-water flow rate?

The rated DHW flow is approximately 10.6 L/min at ΔT35°C.

Is the E-Combi ONE LPG condensing?

Yes. It is a condensing combi boiler.

Does it have a stainless steel heat exchanger?

Yes. Ariston’s XtraTech stainless steel heat exchanger is a central feature of the E-Combi ONE.

What is the modulation ratio?

The E-Combi ONE uses a 1:7 modulation ratio.

Is the E-Combi ONE LPG suitable for off-grid properties?

It can be suitable for properties using LPG rather than mains natural gas, subject to the appliance configuration, LPG supply and local installation requirements.

Does the boiler provide both heating and hot water?

Yes. It is a combination boiler designed to provide central heating and domestic hot water from one appliance.

Does it require a separate hot-water cylinder?

As a combi boiler, it is designed to produce domestic hot water directly rather than requiring a conventional separate hot-water cylinder.

Is the boiler A-rated?

Yes. Ariston lists the E-Combi ONE LPG 24 with A heating and A domestic-hot-water ErP ratings.

Is it compatible with Ariston NET?

Yes, with the required compatible Ariston controls.

Can I install it myself?

No. Gas boiler installation, commissioning and flue work should be performed by an appropriately qualified professional according to the manufacturer’s instructions and applicable regulations.

Buy Ariston E-Combi ONE 24 kW LPG Combi Boiler

The Ariston E-Combi ONE 24 kW LPG Condensing Combi Boiler combines central heating and domestic hot water in one appliance, with 21 kW CH output, 26 kW DHW output, 10.6 L/min DHW flow, A/A ErP performance and an XtraTech stainless steel heat exchanger.

For European customers, verify the exact LPG configuration, flue arrangement and destination-country installation requirements before purchase.

Contact EuroFuelSupply for current availability, European delivery information, trade enquiries and multiple-unit requirements.