Original: $967.89
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$338.76The Story
The Ariston E-Combi ONE Condensing Combi Gas Boiler is available in 24 kW (Part No. 3301131) and 30 kW (Part No. 3301132) outputs, supplied here as boiler only — no flue kit included. This option is intended for replacement installations where the existing flue system is in serviceable condition and will be reused, or for new builds where the flue is supplied and specified separately by the main contractor. Both models share Ariston's patented XtraTech™ stainless steel heat exchanger, 94% seasonal efficiency, A/A ErP energy rating, and 1:7 modulation ratio. LPG conversion kits and wall brackets are included as standard in both boxes. The E-Combi ONE range is compatible with Ariston's full HE Ø60/100 and Ø80/125 coaxial flue accessory range and with Ariston NET smart controls.
- Horizontal through-wall: 3318073 Horizontal Coaxial Kit (1000mm)
- Horizontal + vertical option for installer: 3318074 Horizontal Kit + Vertical Starter bundle
- Vertical domestic (125mm terminal): 3318079 Starter + 3318080 (black) or 3318081 (red) flue kit
- Vertical leisure/caravan (100mm terminal): 3318079 Starter + 3319235 flue kit
Ariston's patented single-coil XtraTech™ stainless steel heat exchanger uses wider waterways than conventional copper alternatives to resist limescale build-up and improve thermal transfer over the boiler's service life. Performance independently certified by TÜV Rheinland.
The AUTO function continuously analyses system thermal behaviour and automatically adjusts boiler output and pump speed to match real demand — reducing short-cycling and preventing energy waste during mild weather, without requiring the householder to intervene.
A 1:7 modulation ratio lets the boiler throttle back to approximately 3.1 kW (24 kW) or 4.3 kW (30 kW) minimum output. This avoids the short-cycling and associated heat exchanger stress that fixed-output boilers produce in well-insulated smaller properties.
Although neither model includes built-in Wi-Fi, both are Ariston NET compatible. Adding the Cube S Net wired thermostat (3319126) or the Cube RF wireless controller enables full remote control and scheduling via the Ariston NET app without any hardware changes to the boiler.
The 24 kW weighs just 29.3 kg at 315 mm deep; the 30 kW 31.9 kg at 385 mm deep. Pipework connections align with previous Ariston models, minimising re-routing time on like-for-like replacements where the existing flue is being retained.
An LPG conversion kit is included as standard in both models. The Gas Safe engineer converts to propane (G31) at commissioning with no additional parts. This makes both models equally suitable for off-grid and rural properties on bottled or bulk LPG.
| Parameter | E-Combi ONE 24 kW | E-Combi ONE 30 kW |
|---|---|---|
| Part Number | 3301131 | 3301132 |
| ErP Rating | A / A (Heating / DHW) | |
| Seasonal Space Heating Efficiency | 94% | |
| SAP 2009/2012 Efficiency | 89.4% | |
| CH Heat Output (Max) | 22 kW | 28 kW |
| DHW Heat Output (Max) | 26 kW | 30 kW |
| DHW Flow Rate ΔT 35°C | 10.4 l/min | 12.5 l/min |
| CH Temperature Range (High) | 35 – 82°C | |
| CH Temperature Range (Low / UFH) | 20 – 45°C | |
| DHW Temperature Range | 36 – 60°C | |
| Modulation Ratio | 1:7 | |
| DHW Pressure Min / Max | 0.2 / 7.0 bar | |
| Built-in Expansion Vessel | 8 litres | |
| Noise Level | 49 dB / Band XL | 51 dB / Band XL |
| NOx Emissions | 53 mg/kWh | 51 mg/kWh |
| Weight | 29.3 kg | 31.9 kg |
| Dimensions H × W × D | 745 × 400 × 315 mm | 745 × 400 × 385 mm |
| Servicing Clearances T / F / Bo | 300 / 450 / 250 mm | |
| Servicing Clearances L / R | 5 / 5 mm | |
| Electrical Supply | 230 V / 50 Hz | |
| IP Rating | IPX5D | |
| Gas Types | Natural gas G20 and LPG propane G31 (conversion kit included) | |
| Max Vertical Flue Run (Ø60/100) | 8 m | 7 m |
Which flue kit do I need for the E-Combi ONE?
Can I reuse my existing flue on a like-for-like swap?
Which output should I choose — 24 kW or 30 kW?
Is a Boiler Plus-compliant control required?
Does the boiler come with anything to fulfil the hot water circuit connection?
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
The Ariston E-Combi ONE Condensing Combi Gas Boiler is available in 24 kW (Part No. 3301131) and 30 kW (Part No. 3301132) outputs, supplied here as boiler only — no flue kit included. This option is intended for replacement installations where the existing flue system is in serviceable condition and will be reused, or for new builds where the flue is supplied and specified separately by the main contractor. Both models share Ariston's patented XtraTech™ stainless steel heat exchanger, 94% seasonal efficiency, A/A ErP energy rating, and 1:7 modulation ratio. LPG conversion kits and wall brackets are included as standard in both boxes. The E-Combi ONE range is compatible with Ariston's full HE Ø60/100 and Ø80/125 coaxial flue accessory range and with Ariston NET smart controls.
- Horizontal through-wall: 3318073 Horizontal Coaxial Kit (1000mm)
- Horizontal + vertical option for installer: 3318074 Horizontal Kit + Vertical Starter bundle
- Vertical domestic (125mm terminal): 3318079 Starter + 3318080 (black) or 3318081 (red) flue kit
- Vertical leisure/caravan (100mm terminal): 3318079 Starter + 3319235 flue kit
Ariston's patented single-coil XtraTech™ stainless steel heat exchanger uses wider waterways than conventional copper alternatives to resist limescale build-up and improve thermal transfer over the boiler's service life. Performance independently certified by TÜV Rheinland.
The AUTO function continuously analyses system thermal behaviour and automatically adjusts boiler output and pump speed to match real demand — reducing short-cycling and preventing energy waste during mild weather, without requiring the householder to intervene.
A 1:7 modulation ratio lets the boiler throttle back to approximately 3.1 kW (24 kW) or 4.3 kW (30 kW) minimum output. This avoids the short-cycling and associated heat exchanger stress that fixed-output boilers produce in well-insulated smaller properties.
Although neither model includes built-in Wi-Fi, both are Ariston NET compatible. Adding the Cube S Net wired thermostat (3319126) or the Cube RF wireless controller enables full remote control and scheduling via the Ariston NET app without any hardware changes to the boiler.
The 24 kW weighs just 29.3 kg at 315 mm deep; the 30 kW 31.9 kg at 385 mm deep. Pipework connections align with previous Ariston models, minimising re-routing time on like-for-like replacements where the existing flue is being retained.
An LPG conversion kit is included as standard in both models. The Gas Safe engineer converts to propane (G31) at commissioning with no additional parts. This makes both models equally suitable for off-grid and rural properties on bottled or bulk LPG.
| Parameter | E-Combi ONE 24 kW | E-Combi ONE 30 kW |
|---|---|---|
| Part Number | 3301131 | 3301132 |
| ErP Rating | A / A (Heating / DHW) | |
| Seasonal Space Heating Efficiency | 94% | |
| SAP 2009/2012 Efficiency | 89.4% | |
| CH Heat Output (Max) | 22 kW | 28 kW |
| DHW Heat Output (Max) | 26 kW | 30 kW |
| DHW Flow Rate ΔT 35°C | 10.4 l/min | 12.5 l/min |
| CH Temperature Range (High) | 35 – 82°C | |
| CH Temperature Range (Low / UFH) | 20 – 45°C | |
| DHW Temperature Range | 36 – 60°C | |
| Modulation Ratio | 1:7 | |
| DHW Pressure Min / Max | 0.2 / 7.0 bar | |
| Built-in Expansion Vessel | 8 litres | |
| Noise Level | 49 dB / Band XL | 51 dB / Band XL |
| NOx Emissions | 53 mg/kWh | 51 mg/kWh |
| Weight | 29.3 kg | 31.9 kg |
| Dimensions H × W × D | 745 × 400 × 315 mm | 745 × 400 × 385 mm |
| Servicing Clearances T / F / Bo | 300 / 450 / 250 mm | |
| Servicing Clearances L / R | 5 / 5 mm | |
| Electrical Supply | 230 V / 50 Hz | |
| IP Rating | IPX5D | |
| Gas Types | Natural gas G20 and LPG propane G31 (conversion kit included) | |
| Max Vertical Flue Run (Ø60/100) | 8 m | 7 m |
