Ariston Next Evo X 11 LPG 19.5 kW Water Heater with Horizontal Flue

Ariston Next Evo X 11 LPG horizontal flue

The Ariston Next Evo X 11 LPG Water Heater with Horizontal Flue is a compact instantaneous gas water heater designed to produce domestic hot water on demand without 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 suitable residential and light commercial hot-water applications.

This version is specifically positioned for customers looking for an Ariston Next Evo X 11 LPG water heater with a horizontal flue configuration.

Ariston’s European technical information identifies the Next Evo X 11 LPG EU configuration with 11 L/min flow at ΔT25°C, 19.5 kW maximum useful output, 22 kW maximum nominal thermal power, Class A energy performance and C13/C33 flue configurations.

Key Features

• Ariston Next Evo X 11 LPG
• Instantaneous gas water heater
• LPG / propane-compatible configuration
• Up to 11 L/min at ΔT25°C
• 19.5 kW maximum useful output
• 22 kW maximum nominal thermal power
• Low-NOx combustion
• Electronic ignition
• Flame-ionisation control
• Electronic temperature control
• LCD user interface
• Compact approximately 165 mm depth
• Energy Class A
• M domestic hot-water load profile
• Internal installation
• C13/C33 flue configurations
• Horizontal flue configuration for suitable installations

Technical Specifications

Technical values should always be checked against the exact appliance data plate, supplied accessories and current installation documentation. Ariston lists the Next Evo X 11 at 11 L/min, 19.5 kW useful output, 22 kW maximum nominal input, 13 kg and C13/C33 flue configurations.

11 L/min LPG Instantaneous Water Heater

The Ariston Next Evo X 11 LPG is an instantaneous water heater, not a conventional storage cylinder.

Its rated hot-water flow is 11 L/min at a 25°C temperature rise. Actual flow depends on incoming cold-water temperature, required outlet temperature, water pressure and operating conditions.

The “11” in the model name therefore refers to the nominal flow class rather than an 11-litre storage capacity.

19.5 kW Maximum Useful Output

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

Ariston separately specifies 22 kW maximum nominal thermal power. These values should not be treated as the same measurement: nominal thermal power relates to the appliance’s thermal input, while useful output relates to heat delivered for water heating.

Low-NOx LPG Water Heater

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

Ariston’s current technical information lists approximately 45 mg/kWh NOx emissions for the 11 model.

This makes Low-NOx performance an important specification for customers comparing modern LPG gas water heaters for European installations.

Electronic Ignition

The Next Evo X 11 uses electronic ignition.

The burner starts automatically when hot-water demand is detected rather than relying on a continuously burning conventional pilot flame. Ariston identifies electronic ignition as a feature of the Next Evo X SFT range.

LCD Display and Temperature Control

The Next Evo X range incorporates electronic temperature control and a user interface designed to allow the hot-water temperature to be monitored and adjusted.

This provides convenient control for normal domestic hot-water use.

Horizontal Flue Configuration

This product page is specifically optimized for customers searching for an Ariston Next Evo X 11 LPG horizontal flue water heater.

Ariston specifies the Next Evo X 11 for C13/C33 flue configurations and lists a Ø60/100 mm coaxial flue system with a maximum length of up to 8 m under the specified configuration.

A horizontal flue arrangement can be appropriate where the approved flue route allows termination through an external wall.

The exact terminal location, maximum developed flue length, elbows, clearances and installation arrangement must follow the current Ariston installation instructions.

Ariston Flue Kit

Ariston’s European technical page identifies flue evacuation kit 3319048 for the Next Evo X SFT range.

For the EuroFuelSupply listing, customers should verify the exact contents of the supplied kit before installation.

Flue accessories should not be assumed to be interchangeable between different Ariston models or configurations.

Compact 165 mm Depth

The Next Evo X 11 has an approximately 165 mm depth, making it a compact gas water heater for installations where wall space is limited.

Ariston’s UK specification lists overall dimensions of approximately 570 × 345 × 165 mm for the 11 model.

Internal Installation

The standard Next Evo X 11 is designed for internal installation.

It should not be confused with Ariston’s separate Next Evo X Outdoor range, which is a different product configuration.

Keeping these products separate is important when selecting the correct appliance for an installation.

LPG Configuration

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

Ariston’s European documentation specifically lists the Next Evo X 11 SFT – GLP EU configuration. It specifies 11 L/min flow at ΔT25°C and 19.5 kW maximum useful output.

The exact gas category must always be checked against the appliance data plate and the regulations applicable in the installation country.

Energy Class A

The Next Evo X 11 is listed with Energy Class A and an M domestic hot-water load profile.

This provides a useful specification for customers comparing instantaneous gas water heaters within the European market.

Suitable Applications

Subject to professional assessment and local regulations, the Ariston Next Evo X 11 LPG may be suitable for:

• Houses
• Apartments
• Holiday homes
• Rental properties
• LPG-powered properties
• Utility areas
• Compact residential installations
• Small accommodation facilities
• Light commercial hot-water applications
• Replacement water-heater installations

Actual suitability depends on hot-water demand, water pressure, LPG supply, flue route and local requirements.

Ariston Next Evo X 11 Horizontal vs Vertical Flue

The core Next Evo X 11 appliance remains the same, while the important difference is the flue routing and terminal arrangement.

A horizontal flue configuration can be appropriate where the approved flue can terminate through an external wall.

A vertical configuration may be required where the building layout calls for roof termination.

Customers should choose the configuration based on the actual installation rather than simply choosing whichever product has the lowest price.

For EuroFuelSupply, keeping separate horizontal- and vertical-flue product pages creates clearer product targeting and helps customers find the appropriate configuration.

Installation Requirements

Gas appliances and flue systems should be installed by an appropriately qualified professional.

Before installation, verify:

• LPG gas category
• Gas supply pressure
• Appliance data plate
• Correct flue configuration
• Horizontal terminal position
• Flue length
• Number and type of bends
• Required clearances
• Ventilation requirements where applicable
• Water pressure
• Gas pipe sizing
• Electrical supply
• Local gas regulations
• Local building regulations

Ariston’s documentation specifies that the appliance must be appropriate for the destination country and that the gas category must correspond with one permitted in that country.

Frequently Asked Questions

Is the Ariston Next Evo X 11 available for LPG?

Yes. Ariston’s European technical documentation specifically lists a Next Evo X 11 SFT GLP EU configuration.

What is the flow rate?

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

What is the output?

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

Is this an 11-litre storage water heater?

No. It is an 11 L/min-class instantaneous gas water heater.

Is it Low-NOx?

Yes. Ariston lists approximately 45 mg/kWh NOx emissions for the 11 model.

Does it use electronic ignition?

Yes. The Next Evo X SFT range uses electronic ignition.

Does the Next Evo X 11 support a horizontal flue?

The appliance supports the manufacturer’s specified C13/C33 flue configurations. This EuroFuelSupply page is specifically positioned for the horizontal-flue configuration. The exact installation must follow the approved flue arrangement and current manual.

What is the maximum coaxial flue length?

Ariston lists up to 8 m for the Ø60/100 mm coaxial configuration, subject to the specified installation arrangement.

Is the Next Evo X 11 for indoor installation?

Yes. The standard Next Evo X 11 is an internal-installation model.

Is it the same as Next Evo X Outdoor?

No. The standard Next Evo X and Next Evo X Outdoor are separate configurations and should not be combined into one product listing.

Is it suitable for every European country?

Not automatically. Gas categories, certification, flue rules and installation regulations vary between countries. Verify the appliance configuration and destination-country requirements before purchase.

Can the horizontal flue be installed by the customer?

Gas appliance and flue installation should be performed by a suitably qualified professional according to Ariston’s instructions and applicable local regulations.

Buy Ariston Next Evo X 11 LPG Horizontal Flue Water Heater

The Ariston Next Evo X 11 LPG Water Heater with Horizontal Flue combines 11 L/min hot-water flow, 19.5 kW useful output, Low-NOx technology, electronic ignition, Class A energy performance and a compact internal-installation design.

It is designed for customers specifically looking for an Ariston Next Evo X 11 LPG horizontal-flue water heater for a suitable European installation.

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