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Ariston Next Evo X 11 LPG Instantaneous Gas Water Heater 3632535 — 11 L/min Room Sealed Multipoint Off-Grid ErP A
Ariston Next Evo X 11 LPG Instantaneous Gas Water Heater 3632535 — 11 L/min Room Sealed Multipoint Off-Grid ErP A
The Ariston Next Evo X 11 LPG (MPN 3632535) is a room-sealed instantaneous gas water heater delivering 11 litres per minute of continuous hot water from an LPG (G30/G31) supply. Designed for domestic and light commercial multipoint applications — simultaneously serving kitchens, bathrooms, and utility rooms — it is the ideal solution for off-gas-grid properties, caravans, lodges, leisure facilities, and anywhere with a high hot water demand but no mains gas connection. Ultra-compact at just 165mm deep (570 × 345mm face), it can be installed in airing cupboards, utility rooms, or any position within flue distance of an external wall. Features oxygen-free copper heat exchanger, lean-rich low NOx burner, built-in temperature stabilisation, ECO mode, LED display with touch controls, post-ventilation system, and flame ionisation electronic ignition. ErP water heating energy efficiency Class A. Maximum heat output 19.3kW (G31). Minimum inlet pressure just 0.2 bar. 2-year warranty. Flue kit sold separately — see MPN 3319648.
⚠ Gas Safe Registered Installation Required — Must be installed by a Gas Safe registered engineer in accordance with the manufacturer's installation manual, Gas Safety (Installation and Use) Regulations 1998, and current British Standards. The appliance requires a 230V / 50Hz mains electrical supply for ignition — a fused spur must be provided. A 60/100mm coaxial flue kit is required and must be purchased separately if not already available (see MPN 3319648 below).
ℹ LPG Model — Off-Grid Ideal
This unit is factory-set for LPG (G30 butane / G31 propane) and is specifically suited to properties off the natural gas grid — rural homes, holiday parks, glamping sites, care homes, and leisure installations. An Ariston-approved gas conversion kit is available if conversion to natural gas is later required. For natural gas, order the Next Evo X 16 (MPN 3632533) instead.
This unit is factory-set for LPG (G30 butane / G31 propane) and is specifically suited to properties off the natural gas grid — rural homes, holiday parks, glamping sites, care homes, and leisure installations. An Ariston-approved gas conversion kit is available if conversion to natural gas is later required. For natural gas, order the Next Evo X 16 (MPN 3632533) instead.
11 L/min
Nominal flow rate
19.3 kW
Max heat output (G31)
0.2 bar
Min inlet pressure
165 mm
Depth only
ErP A
Energy rated
Features & Benefits
✔ Oxygen-Free Copper Heat Exchanger
The oxygen-free copper heat exchanger delivers heat from the burner to the water more efficiently than standard copper, with superior resistance to corrosion and scaling over time. Oxygen-free copper contains a minimum of 99.99% copper with virtually no dissolved oxygen — eliminating the micro-porosity that causes conventional copper to oxidise internally over years of hot water contact. The result is a heat exchanger with a longer operating life and more consistent thermal performance across the product's service life.
✔ Low NOx Lean-Rich Burner — ErP Class A
The lean-rich staged combustion burner reduces nitrogen oxide (NOx) emissions to 45–47 mg/kWh — significantly below the ErP threshold for Class A rating. In a lean-rich burner the primary zone operates with excess air (lean) and the secondary zone with rich mixture — this staged approach lowers peak flame temperatures, which are the primary driver of thermal NOx formation. Water heating energy efficiency ηWH is rated at Class A across both models, meeting the ErP Regulation 814/2013 requirements for instantaneous gas water heaters.
✔ ECO Mode — Built-In Temperature Stabilisation
ECO mode limits the output temperature to a 35–45°C band — ideal for summer use when incoming cold water is warmer and less heat input is needed, reducing gas consumption without the burner over-firing and cycling. The built-in temperature stabilisation system compensates for fluctuations in mains water pressure and incoming cold water temperature, maintaining a consistent output temperature regardless of draw-off rate. This prevents the "cold sandwich" effect common in basic instantaneous heaters where temperature drops when flow rates change.
✔ Post-Ventilation & Overheat Sensor — Electronic Ignition
The post-ventilation system continues the fan for a period after burner shut-off — purging residual combustion gases from the heat exchanger and flue before the appliance returns to standby, reducing flue gas condensate formation and improving heat exchanger longevity. An overheat sensor shuts the appliance down safely if water temperature exceeds safe limits. The electronic ignition with flame ionisation replaces the standing pilot light — ignition only fires when hot water is drawn, eliminating continuous pilot gas consumption and reducing the risk of ignition failure.
✔ Ultra-Compact — 165mm Deep — LED Display
At just 165mm deep with a 570 × 345mm face panel, the Next Evo X 11 fits in spaces where full-depth boilers cannot, making it ideal for airing cupboards, kitchen cupboards, utility rooms, and plant rooms. The LED display with touch buttons provides direct temperature adjustment and status readout from the appliance face, without requiring a separate controller. IPX4D ingress protection rating allows installation in damp environments including bathrooms (in the correct IP zone).
Technical Specifications — Next Evo X 11 LPG (3632535)
| MPN | 3632535 |
| Gas Type | LPG — G30 (butane) / G31 (propane) |
| Gas Category | II2H3P — I3B/P |
| Appliance Type | Room-sealed instantaneous (Type C13/C33) |
| Nominal DHW Flow Rate | 11 L/min |
| Minimum DHW Flow Rate | 2.5 L/min |
| Max. Nominal Heat Input | 22.0 kW |
| Max. Nominal Heat Output | 19.2 kW (G30) / 19.3 kW (G31) |
| Min. Nominal Heat Output | 7.4 kW (G30) / 6.4 kW (G31) |
| DHW Temp Range | 35°C – 65°C |
| Water Pressure — Min / Max | 0.2 bar / 10 bar |
| ErP Water Heating Class | A — ηWH 78.3% |
| NOx Emissions | 45 mg/kWh |
| Noise Level | 58 dB(A) |
| Power Supply | 230V / 50Hz — 29W consumption — internal fuse 3.15A |
| IP Rating | IPX4D |
| Flue Connection | 60/100mm coaxial — flue kit sold separately (3319648) |
| Dimensions (H × W × D) | 570 × 345 × 165 mm |
| Dry Weight | 13 kg |
| Warranty | 2 years manufacturer's warranty |
Frequently Asked Questions
What does 11 litres per minute mean in practice?
The 11 L/min nominal flow rate is the volume of hot water the heater can deliver per minute at the rated temperature rise. For a typical temperature rise from 12°C cold to 40°C output (a comfortable shower temperature), 11 L/min is sufficient for one shower or basin outlet at a time — well-suited to a single bathroom, utility room, or supplement to the main heating system. Minimum activation flow is just 2.5 L/min, so even low-flow taps and eco shower heads will trigger the burner without issue. The heater will deliver hot water at any flow rate between 2.5 L/min and 11 L/min continuously.
Can this heater be converted to natural gas?
This unit is factory-set for LPG (G30/G31 propane/butane). Ariston do offer conversion kits for the Next Evo X range allowing conversion between natural gas and LPG, but gas conversion must only be carried out by a Gas Safe registered engineer and must use the correct Ariston-approved conversion kit. The appliance gas category is II2H3P/I3B/P, meaning it is certified for use on both gas families — but the burner injectors, gas valve calibration, and pressure settings must all be correctly adjusted for the target gas. Using an incorrect gas type or unconverted injectors will result in incorrect combustion, CO risk, and will void the warranty. Contact Ariston or your distributor for the correct conversion kit code.
Do I need a flue kit, and which one?
Yes — the Next Evo X is a room-sealed (Type C) appliance that draws combustion air from and discharges flue gases to the outside through a 60/100mm coaxial flue system. A flue kit is not included with the water heater and must be purchased separately. For a standard installation through a wall to the outside, the Ariston Horizontal Flue Kit 60/100 (SE) MPN 3319648 is the correct flue kit — it includes all components needed for a normal through-wall horizontal termination up to 800mm. For vertical terminations, or for installations requiring extensions, elbows, or bends, additional Ariston flue accessories are available. All flue components used must be Ariston-approved and compatible with the 60/100mm SE coaxial system.
What is the minimum water pressure required?
The Next Evo X has an exceptionally low minimum inlet water pressure of just 0.2 bar — far lower than the 0.5–1.0 bar minimum required by many competing instantaneous heaters. This makes it particularly suitable for properties with poor mains pressure, gravity-fed systems, and loft or rural installations where mains pressure can be marginal. Maximum working pressure is 10 bar. If the incoming pressure is above 3 bar, a pressure-reducing valve should be fitted upstream to protect the appliance and any downstream fittings.
Is the mains electricity connection mandatory?
Yes — the Next Evo X requires a 230V / 50Hz mains electrical supply for the electronic ignition system, the modulating gas valve, the fan, the LED display, and the flame ionisation detection circuit. The appliance draws 29W during operation. A fused spur (typically 3A fused) must be provided by a Part P registered electrician adjacent to the installation position. The appliance cannot operate without mains power — it is not suitable for off-grid locations without a generator or battery inverter supply. The internal fuse is rated 3.15A.
What warranty does the Next Evo X carry?
The Ariston Next Evo X carries a 2-year manufacturer's warranty as standard. Warranty claims require the installation to have been carried out by a Gas Safe registered engineer and in accordance with the Ariston installation manual. The appliance must be installed, commissioned, and maintained in accordance with the manufacturer's instructions, Gas Safety (Installation and Use) Regulations, and applicable British Standards. Ariston UK can be contacted via their website for warranty registration and support.
$601.95
Ariston Next Evo X 11 LPG Instantaneous Gas Water Heater 3632535 — 11 L/min Room Sealed Multipoint Off-Grid ErP A—
$601.95
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Ariston Next Evo X 11 LPG Instantaneous Gas Water Heater 3632535 — 11 L/min Room Sealed Multipoint Off-Grid ErP A
The Ariston Next Evo X 11 LPG (MPN 3632535) is a room-sealed instantaneous gas water heater delivering 11 litres per minute of continuous hot water from an LPG (G30/G31) supply. Designed for domestic and light commercial multipoint applications — simultaneously serving kitchens, bathrooms, and utility rooms — it is the ideal solution for off-gas-grid properties, caravans, lodges, leisure facilities, and anywhere with a high hot water demand but no mains gas connection. Ultra-compact at just 165mm deep (570 × 345mm face), it can be installed in airing cupboards, utility rooms, or any position within flue distance of an external wall. Features oxygen-free copper heat exchanger, lean-rich low NOx burner, built-in temperature stabilisation, ECO mode, LED display with touch controls, post-ventilation system, and flame ionisation electronic ignition. ErP water heating energy efficiency Class A. Maximum heat output 19.3kW (G31). Minimum inlet pressure just 0.2 bar. 2-year warranty. Flue kit sold separately — see MPN 3319648.
⚠ Gas Safe Registered Installation Required — Must be installed by a Gas Safe registered engineer in accordance with the manufacturer's installation manual, Gas Safety (Installation and Use) Regulations 1998, and current British Standards. The appliance requires a 230V / 50Hz mains electrical supply for ignition — a fused spur must be provided. A 60/100mm coaxial flue kit is required and must be purchased separately if not already available (see MPN 3319648 below).
ℹ LPG Model — Off-Grid Ideal
This unit is factory-set for LPG (G30 butane / G31 propane) and is specifically suited to properties off the natural gas grid — rural homes, holiday parks, glamping sites, care homes, and leisure installations. An Ariston-approved gas conversion kit is available if conversion to natural gas is later required. For natural gas, order the Next Evo X 16 (MPN 3632533) instead.
This unit is factory-set for LPG (G30 butane / G31 propane) and is specifically suited to properties off the natural gas grid — rural homes, holiday parks, glamping sites, care homes, and leisure installations. An Ariston-approved gas conversion kit is available if conversion to natural gas is later required. For natural gas, order the Next Evo X 16 (MPN 3632533) instead.
11 L/min
Nominal flow rate
19.3 kW
Max heat output (G31)
0.2 bar
Min inlet pressure
165 mm
Depth only
ErP A
Energy rated
Features & Benefits
✔ Oxygen-Free Copper Heat Exchanger
The oxygen-free copper heat exchanger delivers heat from the burner to the water more efficiently than standard copper, with superior resistance to corrosion and scaling over time. Oxygen-free copper contains a minimum of 99.99% copper with virtually no dissolved oxygen — eliminating the micro-porosity that causes conventional copper to oxidise internally over years of hot water contact. The result is a heat exchanger with a longer operating life and more consistent thermal performance across the product's service life.
✔ Low NOx Lean-Rich Burner — ErP Class A
The lean-rich staged combustion burner reduces nitrogen oxide (NOx) emissions to 45–47 mg/kWh — significantly below the ErP threshold for Class A rating. In a lean-rich burner the primary zone operates with excess air (lean) and the secondary zone with rich mixture — this staged approach lowers peak flame temperatures, which are the primary driver of thermal NOx formation. Water heating energy efficiency ηWH is rated at Class A across both models, meeting the ErP Regulation 814/2013 requirements for instantaneous gas water heaters.
✔ ECO Mode — Built-In Temperature Stabilisation
ECO mode limits the output temperature to a 35–45°C band — ideal for summer use when incoming cold water is warmer and less heat input is needed, reducing gas consumption without the burner over-firing and cycling. The built-in temperature stabilisation system compensates for fluctuations in mains water pressure and incoming cold water temperature, maintaining a consistent output temperature regardless of draw-off rate. This prevents the "cold sandwich" effect common in basic instantaneous heaters where temperature drops when flow rates change.
✔ Post-Ventilation & Overheat Sensor — Electronic Ignition
The post-ventilation system continues the fan for a period after burner shut-off — purging residual combustion gases from the heat exchanger and flue before the appliance returns to standby, reducing flue gas condensate formation and improving heat exchanger longevity. An overheat sensor shuts the appliance down safely if water temperature exceeds safe limits. The electronic ignition with flame ionisation replaces the standing pilot light — ignition only fires when hot water is drawn, eliminating continuous pilot gas consumption and reducing the risk of ignition failure.
✔ Ultra-Compact — 165mm Deep — LED Display
At just 165mm deep with a 570 × 345mm face panel, the Next Evo X 11 fits in spaces where full-depth boilers cannot, making it ideal for airing cupboards, kitchen cupboards, utility rooms, and plant rooms. The LED display with touch buttons provides direct temperature adjustment and status readout from the appliance face, without requiring a separate controller. IPX4D ingress protection rating allows installation in damp environments including bathrooms (in the correct IP zone).
Technical Specifications — Next Evo X 11 LPG (3632535)
| MPN | 3632535 |
| Gas Type | LPG — G30 (butane) / G31 (propane) |
| Gas Category | II2H3P — I3B/P |
| Appliance Type | Room-sealed instantaneous (Type C13/C33) |
| Nominal DHW Flow Rate | 11 L/min |
| Minimum DHW Flow Rate | 2.5 L/min |
| Max. Nominal Heat Input | 22.0 kW |
| Max. Nominal Heat Output | 19.2 kW (G30) / 19.3 kW (G31) |
| Min. Nominal Heat Output | 7.4 kW (G30) / 6.4 kW (G31) |
| DHW Temp Range | 35°C – 65°C |
| Water Pressure — Min / Max | 0.2 bar / 10 bar |
| ErP Water Heating Class | A — ηWH 78.3% |
| NOx Emissions | 45 mg/kWh |
| Noise Level | 58 dB(A) |
| Power Supply | 230V / 50Hz — 29W consumption — internal fuse 3.15A |
| IP Rating | IPX4D |
| Flue Connection | 60/100mm coaxial — flue kit sold separately (3319648) |
| Dimensions (H × W × D) | 570 × 345 × 165 mm |
| Dry Weight | 13 kg |
| Warranty | 2 years manufacturer's warranty |
Frequently Asked Questions
What does 11 litres per minute mean in practice?
The 11 L/min nominal flow rate is the volume of hot water the heater can deliver per minute at the rated temperature rise. For a typical temperature rise from 12°C cold to 40°C output (a comfortable shower temperature), 11 L/min is sufficient for one shower or basin outlet at a time — well-suited to a single bathroom, utility room, or supplement to the main heating system. Minimum activation flow is just 2.5 L/min, so even low-flow taps and eco shower heads will trigger the burner without issue. The heater will deliver hot water at any flow rate between 2.5 L/min and 11 L/min continuously.
Can this heater be converted to natural gas?
This unit is factory-set for LPG (G30/G31 propane/butane). Ariston do offer conversion kits for the Next Evo X range allowing conversion between natural gas and LPG, but gas conversion must only be carried out by a Gas Safe registered engineer and must use the correct Ariston-approved conversion kit. The appliance gas category is II2H3P/I3B/P, meaning it is certified for use on both gas families — but the burner injectors, gas valve calibration, and pressure settings must all be correctly adjusted for the target gas. Using an incorrect gas type or unconverted injectors will result in incorrect combustion, CO risk, and will void the warranty. Contact Ariston or your distributor for the correct conversion kit code.
Do I need a flue kit, and which one?
Yes — the Next Evo X is a room-sealed (Type C) appliance that draws combustion air from and discharges flue gases to the outside through a 60/100mm coaxial flue system. A flue kit is not included with the water heater and must be purchased separately. For a standard installation through a wall to the outside, the Ariston Horizontal Flue Kit 60/100 (SE) MPN 3319648 is the correct flue kit — it includes all components needed for a normal through-wall horizontal termination up to 800mm. For vertical terminations, or for installations requiring extensions, elbows, or bends, additional Ariston flue accessories are available. All flue components used must be Ariston-approved and compatible with the 60/100mm SE coaxial system.
What is the minimum water pressure required?
The Next Evo X has an exceptionally low minimum inlet water pressure of just 0.2 bar — far lower than the 0.5–1.0 bar minimum required by many competing instantaneous heaters. This makes it particularly suitable for properties with poor mains pressure, gravity-fed systems, and loft or rural installations where mains pressure can be marginal. Maximum working pressure is 10 bar. If the incoming pressure is above 3 bar, a pressure-reducing valve should be fitted upstream to protect the appliance and any downstream fittings.
Is the mains electricity connection mandatory?
Yes — the Next Evo X requires a 230V / 50Hz mains electrical supply for the electronic ignition system, the modulating gas valve, the fan, the LED display, and the flame ionisation detection circuit. The appliance draws 29W during operation. A fused spur (typically 3A fused) must be provided by a Part P registered electrician adjacent to the installation position. The appliance cannot operate without mains power — it is not suitable for off-grid locations without a generator or battery inverter supply. The internal fuse is rated 3.15A.
What warranty does the Next Evo X carry?
The Ariston Next Evo X carries a 2-year manufacturer's warranty as standard. Warranty claims require the installation to have been carried out by a Gas Safe registered engineer and in accordance with the Ariston installation manual. The appliance must be installed, commissioned, and maintained in accordance with the manufacturer's instructions, Gas Safety (Installation and Use) Regulations, and applicable British Standards. Ariston UK can be contacted via their website for warranty registration and support.
Product Information
Product Information
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Description
The Ariston Next Evo X 11 LPG (MPN 3632535) is a room-sealed instantaneous gas water heater delivering 11 litres per minute of continuous hot water from an LPG (G30/G31) supply. Designed for domestic and light commercial multipoint applications — simultaneously serving kitchens, bathrooms, and utility rooms — it is the ideal solution for off-gas-grid properties, caravans, lodges, leisure facilities, and anywhere with a high hot water demand but no mains gas connection. Ultra-compact at just 165mm deep (570 × 345mm face), it can be installed in airing cupboards, utility rooms, or any position within flue distance of an external wall. Features oxygen-free copper heat exchanger, lean-rich low NOx burner, built-in temperature stabilisation, ECO mode, LED display with touch controls, post-ventilation system, and flame ionisation electronic ignition. ErP water heating energy efficiency Class A. Maximum heat output 19.3kW (G31). Minimum inlet pressure just 0.2 bar. 2-year warranty. Flue kit sold separately — see MPN 3319648.
⚠ Gas Safe Registered Installation Required — Must be installed by a Gas Safe registered engineer in accordance with the manufacturer's installation manual, Gas Safety (Installation and Use) Regulations 1998, and current British Standards. The appliance requires a 230V / 50Hz mains electrical supply for ignition — a fused spur must be provided. A 60/100mm coaxial flue kit is required and must be purchased separately if not already available (see MPN 3319648 below).
ℹ LPG Model — Off-Grid Ideal
This unit is factory-set for LPG (G30 butane / G31 propane) and is specifically suited to properties off the natural gas grid — rural homes, holiday parks, glamping sites, care homes, and leisure installations. An Ariston-approved gas conversion kit is available if conversion to natural gas is later required. For natural gas, order the Next Evo X 16 (MPN 3632533) instead.
This unit is factory-set for LPG (G30 butane / G31 propane) and is specifically suited to properties off the natural gas grid — rural homes, holiday parks, glamping sites, care homes, and leisure installations. An Ariston-approved gas conversion kit is available if conversion to natural gas is later required. For natural gas, order the Next Evo X 16 (MPN 3632533) instead.
11 L/min
Nominal flow rate
19.3 kW
Max heat output (G31)
0.2 bar
Min inlet pressure
165 mm
Depth only
ErP A
Energy rated
Features & Benefits
✔ Oxygen-Free Copper Heat Exchanger
The oxygen-free copper heat exchanger delivers heat from the burner to the water more efficiently than standard copper, with superior resistance to corrosion and scaling over time. Oxygen-free copper contains a minimum of 99.99% copper with virtually no dissolved oxygen — eliminating the micro-porosity that causes conventional copper to oxidise internally over years of hot water contact. The result is a heat exchanger with a longer operating life and more consistent thermal performance across the product's service life.
✔ Low NOx Lean-Rich Burner — ErP Class A
The lean-rich staged combustion burner reduces nitrogen oxide (NOx) emissions to 45–47 mg/kWh — significantly below the ErP threshold for Class A rating. In a lean-rich burner the primary zone operates with excess air (lean) and the secondary zone with rich mixture — this staged approach lowers peak flame temperatures, which are the primary driver of thermal NOx formation. Water heating energy efficiency ηWH is rated at Class A across both models, meeting the ErP Regulation 814/2013 requirements for instantaneous gas water heaters.
✔ ECO Mode — Built-In Temperature Stabilisation
ECO mode limits the output temperature to a 35–45°C band — ideal for summer use when incoming cold water is warmer and less heat input is needed, reducing gas consumption without the burner over-firing and cycling. The built-in temperature stabilisation system compensates for fluctuations in mains water pressure and incoming cold water temperature, maintaining a consistent output temperature regardless of draw-off rate. This prevents the "cold sandwich" effect common in basic instantaneous heaters where temperature drops when flow rates change.
✔ Post-Ventilation & Overheat Sensor — Electronic Ignition
The post-ventilation system continues the fan for a period after burner shut-off — purging residual combustion gases from the heat exchanger and flue before the appliance returns to standby, reducing flue gas condensate formation and improving heat exchanger longevity. An overheat sensor shuts the appliance down safely if water temperature exceeds safe limits. The electronic ignition with flame ionisation replaces the standing pilot light — ignition only fires when hot water is drawn, eliminating continuous pilot gas consumption and reducing the risk of ignition failure.
✔ Ultra-Compact — 165mm Deep — LED Display
At just 165mm deep with a 570 × 345mm face panel, the Next Evo X 11 fits in spaces where full-depth boilers cannot, making it ideal for airing cupboards, kitchen cupboards, utility rooms, and plant rooms. The LED display with touch buttons provides direct temperature adjustment and status readout from the appliance face, without requiring a separate controller. IPX4D ingress protection rating allows installation in damp environments including bathrooms (in the correct IP zone).
Technical Specifications — Next Evo X 11 LPG (3632535)
| MPN | 3632535 |
| Gas Type | LPG — G30 (butane) / G31 (propane) |
| Gas Category | II2H3P — I3B/P |
| Appliance Type | Room-sealed instantaneous (Type C13/C33) |
| Nominal DHW Flow Rate | 11 L/min |
| Minimum DHW Flow Rate | 2.5 L/min |
| Max. Nominal Heat Input | 22.0 kW |
| Max. Nominal Heat Output | 19.2 kW (G30) / 19.3 kW (G31) |
| Min. Nominal Heat Output | 7.4 kW (G30) / 6.4 kW (G31) |
| DHW Temp Range | 35°C – 65°C |
| Water Pressure — Min / Max | 0.2 bar / 10 bar |
| ErP Water Heating Class | A — ηWH 78.3% |
| NOx Emissions | 45 mg/kWh |
| Noise Level | 58 dB(A) |
| Power Supply | 230V / 50Hz — 29W consumption — internal fuse 3.15A |
| IP Rating | IPX4D |
| Flue Connection | 60/100mm coaxial — flue kit sold separately (3319648) |
| Dimensions (H × W × D) | 570 × 345 × 165 mm |
| Dry Weight | 13 kg |
| Warranty | 2 years manufacturer's warranty |
Frequently Asked Questions
What does 11 litres per minute mean in practice?
The 11 L/min nominal flow rate is the volume of hot water the heater can deliver per minute at the rated temperature rise. For a typical temperature rise from 12°C cold to 40°C output (a comfortable shower temperature), 11 L/min is sufficient for one shower or basin outlet at a time — well-suited to a single bathroom, utility room, or supplement to the main heating system. Minimum activation flow is just 2.5 L/min, so even low-flow taps and eco shower heads will trigger the burner without issue. The heater will deliver hot water at any flow rate between 2.5 L/min and 11 L/min continuously.
Can this heater be converted to natural gas?
This unit is factory-set for LPG (G30/G31 propane/butane). Ariston do offer conversion kits for the Next Evo X range allowing conversion between natural gas and LPG, but gas conversion must only be carried out by a Gas Safe registered engineer and must use the correct Ariston-approved conversion kit. The appliance gas category is II2H3P/I3B/P, meaning it is certified for use on both gas families — but the burner injectors, gas valve calibration, and pressure settings must all be correctly adjusted for the target gas. Using an incorrect gas type or unconverted injectors will result in incorrect combustion, CO risk, and will void the warranty. Contact Ariston or your distributor for the correct conversion kit code.
Do I need a flue kit, and which one?
Yes — the Next Evo X is a room-sealed (Type C) appliance that draws combustion air from and discharges flue gases to the outside through a 60/100mm coaxial flue system. A flue kit is not included with the water heater and must be purchased separately. For a standard installation through a wall to the outside, the Ariston Horizontal Flue Kit 60/100 (SE) MPN 3319648 is the correct flue kit — it includes all components needed for a normal through-wall horizontal termination up to 800mm. For vertical terminations, or for installations requiring extensions, elbows, or bends, additional Ariston flue accessories are available. All flue components used must be Ariston-approved and compatible with the 60/100mm SE coaxial system.
What is the minimum water pressure required?
The Next Evo X has an exceptionally low minimum inlet water pressure of just 0.2 bar — far lower than the 0.5–1.0 bar minimum required by many competing instantaneous heaters. This makes it particularly suitable for properties with poor mains pressure, gravity-fed systems, and loft or rural installations where mains pressure can be marginal. Maximum working pressure is 10 bar. If the incoming pressure is above 3 bar, a pressure-reducing valve should be fitted upstream to protect the appliance and any downstream fittings.
Is the mains electricity connection mandatory?
Yes — the Next Evo X requires a 230V / 50Hz mains electrical supply for the electronic ignition system, the modulating gas valve, the fan, the LED display, and the flame ionisation detection circuit. The appliance draws 29W during operation. A fused spur (typically 3A fused) must be provided by a Part P registered electrician adjacent to the installation position. The appliance cannot operate without mains power — it is not suitable for off-grid locations without a generator or battery inverter supply. The internal fuse is rated 3.15A.
What warranty does the Next Evo X carry?
The Ariston Next Evo X carries a 2-year manufacturer's warranty as standard. Warranty claims require the installation to have been carried out by a Gas Safe registered engineer and in accordance with the Ariston installation manual. The appliance must be installed, commissioned, and maintained in accordance with the manufacturer's instructions, Gas Safety (Installation and Use) Regulations, and applicable British Standards. Ariston UK can be contacted via their website for warranty registration and support.
