Ariston Next Evo X 11 LPG 19.5 kW Gas Water Heater

Ariston Next Evo X 11 LPG water heater

The Ariston Next Evo X 11 LPG Water Heater is a compact, instantaneous gas water heater designed to provide hot water on demand without requiring a conventional storage cylinder.

With a maximum useful output of 19.5 kW and hot-water flow of up to 11 L/min at a 25°C temperature rise, the Next Evo X 11 is designed for applications requiring a compact LPG water-heating solution.

The appliance combines Low-NOx technology, electronic ignition, electronic temperature control and an LCD display in a compact wall-mounted design with only approximately 16.5 cm depth. Ariston lists the Next Evo X 11 in energy class A and with an M domestic hot-water load profile.

Key Features

• Ariston Next Evo X 11 LPG gas water heater
• Instantaneous hot-water production
• Up to 11 L/min at ΔT25°C
• 19.5 kW maximum useful output
• 22 kW maximum nominal thermal power
• Low-NOx combustion technology
• Electronic ignition with flame ionisation control
• Electronic temperature control
• Multifunction LCD display
• Compact approximately 16.5 cm depth
• Energy class A
• M domestic hot-water load profile
• Internal installation
• C13/C33 flue configurations
• LPG-compatible configuration
• Designed for on-demand domestic hot water

Ariston Next Evo X 11 Technical Specifications

Specifications should always be checked against the exact LPG model, data plate and installation documentation supplied with the product. Ariston’s current documentation lists the Next Evo X 11 with 11 L/min at ΔT25°C, 19.5 kW maximum useful output, 22 kW nominal thermal power, 45 mg/kWh NOx emissions, 13 kg weight and 8 m maximum coaxial flue length.

11 L/min Instantaneous LPG Water Heater

The Ariston Next Evo X 11 is an instantaneous water heater rather than a conventional storage water heater.

Its rated domestic hot-water flow is 11 L/min at a 25°C temperature rise. This means the actual usable flow depends on the incoming cold-water temperature and the required hot-water temperature.

The “11” in the model name should therefore not be interpreted as an 11-litre storage tank.

19.5 kW Maximum Useful Output

The Next Evo X 11 has a maximum useful output of 19.5 kW.

Ariston also specifies a maximum nominal thermal power of 22 kW. These figures should not be confused: nominal thermal power describes the appliance’s thermal input, while useful output describes the heat delivered for water heating.

This makes the Next Evo X 11 particularly relevant to customers searching for an 11 L/min LPG gas water heater with compact dimensions.

Low-NOx Gas Water Heating

The Next Evo X range is designed as a Low-NOx instantaneous gas water heater.

Ariston’s current specifications list approximately 45 mg/kWh NOx emissions for the Next Evo X 11.

This is an important technical characteristic for buyers comparing modern gas water heaters and assessing applicable European installation requirements.

Electronic Ignition

The Next Evo X 11 uses electronic ignition with flame-ionisation control.

This allows the appliance to ignite automatically when hot-water demand occurs rather than relying on a continuously burning conventional pilot flame. Ariston identifies electronic ignition as one of the key features of the Next Evo X range.

Electronic Temperature Control and LCD Display

The Ariston Next Evo X 11 includes electronic temperature management and a multifunction LCD display.

The controls allow the user to monitor and adjust hot-water temperature conveniently.

Ariston describes the display as an intuitive LCD interface designed to make water-temperature adjustment easier.

Compact 16.5 cm Design

One of the major physical characteristics of the Next Evo X 11 is its compact depth.

The 11-litre model has a depth of approximately 16.5 cm, making it suitable for installations where available wall space is limited.

The overall appliance remains compact at approximately 13 kg, according to Ariston’s current technical information.

Internal Installation

The standard Next Evo X is designed for internal installation.

This is different from the separate Next Evo X Outdoor range. Do not mix the specifications of the indoor Next Evo X and Outdoor models on this product page.

Ariston’s standard Next Evo X documentation identifies the appliance as an internal-installation gas water heater, while the Outdoor version is separately specified for external installation.

LPG Gas Configuration

This product is positioned for customers looking for the Ariston Next Evo X 11 LPG water heater.

Ariston’s European documentation identifies the Next Evo X 11 in gas categories covering natural gas and LPG configurations. The Spanish technical page specifically lists a Next Evo X 11 SFT GLP EU configuration with the same 11 L/min and 19.5 kW useful-output specifications.

Always verify that the exact gas category shown on the appliance data plate is approved for the country where the water heater will be installed.

Flue Options

The Next Evo X 11 supports specified room-sealed flue configurations including C13 and C33 arrangements.

Ariston lists:

• Ø60/100 mm coaxial flue
• Ø80/80 mm split flue
• Up to 8 m maximum coaxial flue length under the specified configuration
• Up to 8 + 8 m for the specified split-flue arrangement

Actual permitted flue length depends on the configuration, elbows, terminals and installation instructions.

Energy Class A

The Ariston Next Evo X 11 has an A energy class rating for domestic hot water within the applicable ErP classification.

Ariston also lists the model with an M load profile.

Do not describe this as an electric water heater or condensing boiler. It is an instantaneous gas water heater.

Suitable Applications

Subject to professional installation and local regulations, the Ariston Next Evo X 11 can be considered for:

• Residential hot water
• Apartments
• Houses
• Holiday homes
• Rental properties
• Small accommodation facilities
• Utility areas
• Compact hot-water installations
• LPG-powered properties
• Light commercial applications where the flow requirement is appropriate

The required flow rate should always be assessed against the number of outlets likely to operate simultaneously.

Why Choose the Ariston Next Evo X 11 LPG?

The Next Evo X 11 combines several features that make it relevant to customers searching for a compact LPG instantaneous water heater:

• 11 L/min hot-water flow at ΔT25°C
• 19.5 kW maximum useful output
• LPG-compatible configuration
• Low-NOx combustion
• Electronic ignition
• Electronic temperature control
• LCD display
• Energy class A
• Compact 16.5 cm depth
• Internal installation
• C13/C33 flue options

Installation Requirements

Gas appliances should be installed by an appropriately qualified professional.

Before installation, the installer should confirm:

• LPG type and gas category
• Gas supply pressure
• Appliance data plate
• Correct flue configuration
• Flue terminal location
• Required clearances
• Combustion and ventilation requirements where applicable
• Water pressure
• Gas pipe sizing
• Electrical supply
• Local gas and building regulations

Ariston specifically instructs installers to verify that the appliance is intended for the destination country and that its gas category corresponds with the categories permitted there.

Ariston Next Evo X 11 vs Next Evo X 16

The Next Evo X range includes both 11 and 16 L/min models.

The Next Evo X 11 provides 11 L/min at ΔT25°C, while the Next Evo X 16 provides 16 L/min at the same reference temperature. The 11 model is also lighter and more compact.

Customers should select the model according to required hot-water flow rather than choosing purely on nominal model number.

Frequently Asked Questions

Is the Ariston Next Evo X 11 an LPG water heater?

Yes. Ariston’s European documentation lists a Next Evo X 11 LPG configuration.

What is the flow rate of the Ariston Next Evo X 11?

The rated hot-water flow is 11 L/min at a 25°C temperature rise.

What is the output of the Next Evo X 11?

The maximum useful output is 19.5 kW. Ariston separately lists 22 kW as maximum nominal thermal power.

Is the Next Evo X 11 a storage water heater?

No. It is an instantaneous gas water heater that heats water as it is required.

Is the Ariston Next Evo X 11 Low-NOx?

Yes. The Next Evo X range is designed as a Low-NOx gas water-heating range, with the 11 model listed at approximately 45 mg/kWh NOx in Ariston’s current specifications.

Does the Next Evo X 11 use electronic ignition?

Yes. Ariston specifies electronic ignition with flame-ionisation control.

Does the Next Evo X 11 have a display?

Yes. It features a multifunction LCD display for temperature control and information.

Is the Next Evo X 11 for indoor or outdoor installation?

The standard Next Evo X 11 is intended for internal installation. Ariston also sells a separate Next Evo X Outdoor range, so the two products should not be confused.

What flue does the Next Evo X 11 use?

Ariston lists C13/C33 flue configurations, including Ø60/100 mm coaxial and Ø80/80 mm split arrangements. The permitted flue configuration must follow the exact installation manual and supplied components.

Can the Next Evo X 11 be used anywhere in Europe?

The model is offered in European gas configurations, but gas categories and installation regulations differ by destination country. The exact appliance data plate and destination-country requirements must be checked before installation.

Is professional installation required?

Gas, electrical and flue work should be performed by appropriately qualified professionals in accordance with the manufacturer’s instructions and applicable local regulations.

Buy Ariston Next Evo X 11 LPG Water Heater

The Ariston Next Evo X 11 LPG Water Heater combines 11 L/min hot-water flow, 19.5 kW maximum useful output, Low-NOx technology, electronic ignition, electronic temperature control and a compact internal-installation design.

For European customers, verify the required 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.