Original: $990.64
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$346.72The Story
The Ariston E-Combi ONE 24 kW Condensing Combi Gas Boiler (Part No. 3301131) with 5 Years Warranty paired with the 100mm Vertical Flue Kit (Part No. 3319235) and Vertical Starter (Part No. 3318079) is the correct installation pack for static caravans, holiday lodges, park homes, and leisure accommodation where the boiler must flue vertically through the roof. The 3319235 is not the standard domestic Ariston vertical flue kit — it uses a 100mm-diameter terminal specifically sized to fit the smaller roof penetrations and existing 100mm flashings already fitted for older Morco and Worcester Bosch boilers, making it the ideal drop-in replacement in the leisure sector without disturbing the roof structure. The boiler itself delivers 94% seasonal efficiency, a 1:7 modulation ratio, and Ariston's patented XtraTech™ stainless steel heat exchanger — proven technology in a lightweight 29.3 kg package well suited to the space constraints of holiday home plant rooms.
- Ariston E-Combi ONE 24 kW Combi Boiler — Part No. 3301131
- Vertical Starter — Part No. 3318079 (clamps to boiler exhaust manifold; push-fit to flue kit above)
- Vertical Flue Kit — 100mm Black Terminal — Part No. 3319235 (Ø60/100 concentric, 1240 mm total, 575 mm usable)
- LPG Conversion Kit — included as standard (essential for bottled-gas holiday home sites)
Not included: Roof flashing / terminal cowl (must suit your existing 100mm roof penetration), flue support brackets (3318015 recommended per extension), and any additional extension pipes if the ceiling height requires them.
The 3319235 uses a 100mm-diameter terminal — specifically designed for the leisure boiler market where older Morco and Worcester Bosch installations left 100mm roof penetrations. Replacing a failed leisure boiler with this pack avoids any roof or ceiling work, making changeover significantly faster and lower-cost on a managed holiday park.
Ariston's patented single-coil XtraTech™ stainless steel heat exchanger features wider waterways than conventional copper alternatives, resisting limescale accumulation and improving long-term reliability — important in holiday home applications where boilers may sit dormant for extended periods between letting seasons.
An LPG conversion kit is included as standard in every E-Combi ONE box. Most holiday parks and static caravan sites operate on bottled LPG (propane / G31) rather than mains natural gas — the conversion is carried out at commissioning by the Gas Safe engineer, with no additional parts required.
The AUTO function continuously monitors system behaviour and automatically adjusts boiler output and pump speed to match actual heating demand. In holiday home use, where occupancy patterns vary from full-time residence, this prevents energy waste during partial-occupancy periods without requiring guests or owners to manually adjust settings.
At 29.3 kg and only 315 mm deep, the E-Combi ONE fits comfortably in the restricted plant spaces typical of static caravans, park home utility cupboards, and lodge boiler housings. All connection points match previous Ariston models for straightforward like-for-like replacement without re-routing pipework.
A 1:7 modulation ratio lets the boiler throttle back to around 3.1 kW minimum output, avoiding the short-cycling and noise that on/off boilers produce in smaller, well-insulated spaces. At 49 dB (Band XL), it is one of the quieter options in its class — a meaningful benefit in thin-walled leisure accommodation where mechanical noise carries easily.
| Technical Specifications — E-Combi ONE 24 kW (3301131) | |
|---|---|
| Parameter | Value |
| Boiler Part Number | 3301131 |
| ErP Energy Rating | A / A (Heating / DHW) |
| Seasonal Space Heating Efficiency | 94% |
| Water Heating Energy Efficiency | 83% |
| SAP 2009/2012 Efficiency | 89.4% |
| CH Heat Output (Max) | 22 kW |
| DHW Heat Output (Max) | 26 kW |
| DHW Flow Rate ΔT 35°C | 10.4 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 |
| Min DHW Flow Rate | 2 l/min |
| DHW Pressure Min / Max | 0.2 / 7.0 bar |
| Built-in Expansion Vessel | 8 litres |
| Noise Level | 49 dB / Band XL |
| NOx Emissions | 53 mg/kWh |
| Boiler Weight | 29.3 kg |
| Dimensions H × W × D | 745 × 400 × 315 mm |
| Servicing Clearances — Top / Front / Bottom | 300 / 450 / 250 mm |
| Servicing Clearances — Left / Right | 5 / 5 mm |
| Electrical Supply | 230 V / 50 Hz |
| IP Rating | IPX5D |
| Gas Types Supported | Natural gas (G20) and LPG propane (G31) — LPG kit included |
| 100mm Vertical Flue Kit Specifications (3319235 + 3318079) | |
| Flue Terminal Part No. | 3319235 — 100mm Black Terminal (Caravan & Leisure) |
| Vertical Starter Part No. | 3318079 |
| Flue Pipe Diameter | Ø60/100 mm coaxial (concentric exhaust / air intake) |
| Terminal Diameter | 100 mm — fits existing Morco & Worcester Bosch legacy flashings |
| Total Flue Kit Length | 1240 mm |
| Usable Flue Length | 575 mm (varies with flashing type fitted) |
| Max Vertical Flue Run — 24 kW on Ø60/100 | 8 metres total (see installation manual for elbow deductions) |
| Connection Type | Push-fit with lip seal throughout — no clamps required on flue joints |
| Standard Domestic Equivalent | 3318080 (black, 125mm terminal) / 3318081 (red, 125mm terminal) — not this kit |
| Roof Flashing | Not included — must suit existing 100mm roof penetration; do not use 125mm domestic flashings |
Why is the 3319235 different from the standard Ariston vertical flue kit?
Does the 3319235 kit include the Vertical Starter (3318079)?
Can I use this kit if there is no existing flashing — for example in a new-build lodge?
Can I extend the vertical run if the kit is too short for my ceiling height?
Does the boiler work on LPG for sites without mains gas?
Is the E-Combi ONE suitable for frost protection during the off-season?
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.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
The Ariston E-Combi ONE 24 kW Condensing Combi Gas Boiler (Part No. 3301131) with 5 Years Warranty paired with the 100mm Vertical Flue Kit (Part No. 3319235) and Vertical Starter (Part No. 3318079) is the correct installation pack for static caravans, holiday lodges, park homes, and leisure accommodation where the boiler must flue vertically through the roof. The 3319235 is not the standard domestic Ariston vertical flue kit — it uses a 100mm-diameter terminal specifically sized to fit the smaller roof penetrations and existing 100mm flashings already fitted for older Morco and Worcester Bosch boilers, making it the ideal drop-in replacement in the leisure sector without disturbing the roof structure. The boiler itself delivers 94% seasonal efficiency, a 1:7 modulation ratio, and Ariston's patented XtraTech™ stainless steel heat exchanger — proven technology in a lightweight 29.3 kg package well suited to the space constraints of holiday home plant rooms.
- Ariston E-Combi ONE 24 kW Combi Boiler — Part No. 3301131
- Vertical Starter — Part No. 3318079 (clamps to boiler exhaust manifold; push-fit to flue kit above)
- Vertical Flue Kit — 100mm Black Terminal — Part No. 3319235 (Ø60/100 concentric, 1240 mm total, 575 mm usable)
- LPG Conversion Kit — included as standard (essential for bottled-gas holiday home sites)
Not included: Roof flashing / terminal cowl (must suit your existing 100mm roof penetration), flue support brackets (3318015 recommended per extension), and any additional extension pipes if the ceiling height requires them.
The 3319235 uses a 100mm-diameter terminal — specifically designed for the leisure boiler market where older Morco and Worcester Bosch installations left 100mm roof penetrations. Replacing a failed leisure boiler with this pack avoids any roof or ceiling work, making changeover significantly faster and lower-cost on a managed holiday park.
Ariston's patented single-coil XtraTech™ stainless steel heat exchanger features wider waterways than conventional copper alternatives, resisting limescale accumulation and improving long-term reliability — important in holiday home applications where boilers may sit dormant for extended periods between letting seasons.
An LPG conversion kit is included as standard in every E-Combi ONE box. Most holiday parks and static caravan sites operate on bottled LPG (propane / G31) rather than mains natural gas — the conversion is carried out at commissioning by the Gas Safe engineer, with no additional parts required.
The AUTO function continuously monitors system behaviour and automatically adjusts boiler output and pump speed to match actual heating demand. In holiday home use, where occupancy patterns vary from full-time residence, this prevents energy waste during partial-occupancy periods without requiring guests or owners to manually adjust settings.
At 29.3 kg and only 315 mm deep, the E-Combi ONE fits comfortably in the restricted plant spaces typical of static caravans, park home utility cupboards, and lodge boiler housings. All connection points match previous Ariston models for straightforward like-for-like replacement without re-routing pipework.
A 1:7 modulation ratio lets the boiler throttle back to around 3.1 kW minimum output, avoiding the short-cycling and noise that on/off boilers produce in smaller, well-insulated spaces. At 49 dB (Band XL), it is one of the quieter options in its class — a meaningful benefit in thin-walled leisure accommodation where mechanical noise carries easily.
| Technical Specifications — E-Combi ONE 24 kW (3301131) | |
|---|---|
| Parameter | Value |
| Boiler Part Number | 3301131 |
| ErP Energy Rating | A / A (Heating / DHW) |
| Seasonal Space Heating Efficiency | 94% |
| Water Heating Energy Efficiency | 83% |
| SAP 2009/2012 Efficiency | 89.4% |
| CH Heat Output (Max) | 22 kW |
| DHW Heat Output (Max) | 26 kW |
| DHW Flow Rate ΔT 35°C | 10.4 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 |
| Min DHW Flow Rate | 2 l/min |
| DHW Pressure Min / Max | 0.2 / 7.0 bar |
| Built-in Expansion Vessel | 8 litres |
| Noise Level | 49 dB / Band XL |
| NOx Emissions | 53 mg/kWh |
| Boiler Weight | 29.3 kg |
| Dimensions H × W × D | 745 × 400 × 315 mm |
| Servicing Clearances — Top / Front / Bottom | 300 / 450 / 250 mm |
| Servicing Clearances — Left / Right | 5 / 5 mm |
| Electrical Supply | 230 V / 50 Hz |
| IP Rating | IPX5D |
| Gas Types Supported | Natural gas (G20) and LPG propane (G31) — LPG kit included |
| 100mm Vertical Flue Kit Specifications (3319235 + 3318079) | |
| Flue Terminal Part No. | 3319235 — 100mm Black Terminal (Caravan & Leisure) |
| Vertical Starter Part No. | 3318079 |
| Flue Pipe Diameter | Ø60/100 mm coaxial (concentric exhaust / air intake) |
| Terminal Diameter | 100 mm — fits existing Morco & Worcester Bosch legacy flashings |
| Total Flue Kit Length | 1240 mm |
| Usable Flue Length | 575 mm (varies with flashing type fitted) |
| Max Vertical Flue Run — 24 kW on Ø60/100 | 8 metres total (see installation manual for elbow deductions) |
| Connection Type | Push-fit with lip seal throughout — no clamps required on flue joints |
| Standard Domestic Equivalent | 3318080 (black, 125mm terminal) / 3318081 (red, 125mm terminal) — not this kit |
| Roof Flashing | Not included — must suit existing 100mm roof penetration; do not use 125mm domestic flashings |
