The Story
The Ariston E-Combi ONE 30 kW Condensing Combi Gas Boiler (Part No. 3301132) paired with the 100mm Vertical Flue Kit (Part No. 3319235) and Vertical Starter (Part No. 3318079) is the higher-output version of the popular E-Combi ONE leisure pack, designed for larger static caravans, holiday lodges, and park homes that need the additional domestic hot water and heating capacity of a 30 kW boiler. Like the 24 kW variant, it uses the 3319235 100mm-terminal vertical flue kit — the specialist leisure-market flue that fits existing 100mm roof penetrations left by older Morco and Worcester Bosch boilers, eliminating any need to disturb the roof structure on a changeover. Backed by Ariston's patented XtraTech™ stainless steel heat exchanger, 94% seasonal efficiency, and a 1:7 modulation ratio, the 30 kW model delivers a 12.5 l/min DHW flow rate — meaningfully better than the 24 kW unit for properties with two shower rooms or higher simultaneous hot water demand. The LPG conversion kit is included as standard, making it directly suitable for sites on bottled propane.
- Ariston E-Combi ONE 30 kW Combi Boiler — Part No. 3301132
- 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 — do not use standard Ariston 125mm domestic flashings), flue support brackets (3318015 recommended per extension), and any additional Ø60/100 extension pipes if the ceiling height requires them.
The 3319235 uses a 100mm-diameter terminal purpose-built for the leisure market, where Morco and Worcester Bosch boilers historically used 100mm roof penetrations. Replacing either brand on an existing site with this pack requires no roof or ceiling structural work — the terminal passes through the existing aperture and cowl, making changeover faster and cheaper on a managed holiday park with multiple units.
The step from 24 kW to 30 kW increases maximum DHW heat output from 26 kW to 30 kW and flow rate from 10.4 to 12.5 l/min at ΔT35°C. For a holiday lodge with two shower rooms, or a large static caravan where guests frequently use the bathroom simultaneously, this difference prevents the flow temperature drop and reduced pressure that a 24 kW unit would experience under peak demand.
Ariston's patented single-coil XtraTech™ stainless steel heat exchanger features wider waterways than conventional copper alternatives, improving long-term resistance to limescale and corrosion — important on leisure properties where water treatment may not be as consistently maintained as in a permanent domestic system, and where the boiler may stand idle between letting seasons.
An LPG conversion kit is included as standard in every E-Combi ONE box. The conversion to propane (G31) is completed at commissioning by the Gas Safe engineer with no additional parts. Holiday parks and caravan sites typically operate on bulk LPG tanks or cylinder manifolds — this boiler is ready for those setups without further hardware.
The AUTO function continuously monitors heating system behaviour and automatically adjusts boiler output and pump speed to match actual demand. In holiday letting use, where occupancy varies from busy peak weeks to empty off-season periods, this prevents energy waste without requiring owners or guests to reconfigure settings between visits.
A 1:7 modulation ratio allows the 30 kW boiler to turn down to approximately 4.3 kW minimum output, avoiding disruptive short-cycling in well-heated spaces. At 51 dB (Band XL), audible noise is minimised — a meaningful advantage in the thin-walled construction of static caravans and lodges where mechanical noise transfers easily between rooms.
| Technical Specifications — E-Combi ONE 30 kW (3301132) | |
|---|---|
| Parameter | Value |
| Boiler Part Number | 3301132 |
| ErP Energy Rating | A / A (Heating / DHW) |
| Seasonal Space Heating Efficiency | 94% |
| Water Heating Energy Efficiency | 82% |
| SAP 2009/2012 Efficiency | 89.4% |
| CH Heat Output (Max) | 28 kW |
| DHW Heat Output (Max) | 30 kW |
| DHW Flow Rate ΔT 35°C | 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 |
| Min DHW Flow Rate | 2 l/min |
| DHW Pressure Min / Max | 0.2 / 7.0 bar |
| Built-in Expansion Vessel | 8 litres |
| Noise Level | 51 dB / Band XL |
| NOx Emissions | 51 mg/kWh |
| Boiler Weight | 31.9 kg |
| Dimensions H × W × D | 745 × 400 × 385 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 |
| Max Vertical Flue Run — 30 kW on Ø60/100 | 7 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) / 3318081 (red, 125mm) — not this kit |
| Roof Flashing | Not included — must suit existing 100mm penetration; standard Ariston domestic flashings are 125mm and will not seal on this terminal |
Why is the maximum vertical flue run 7 metres on the 30 kW rather than 8 metres on the 24 kW?
Should I choose the 24 kW or 30 kW for my lodge or static caravan?
Does the 3319235 fit the same Morco and Worcester Bosch roof flashings regardless of boiler output?
Can I extend the vertical run if the kit length isn't sufficient?
Does the boiler work on LPG for sites without mains gas?
Does the anti-frost protection cover the whole property?
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 30 kW Condensing Combi Gas Boiler (Part No. 3301132) paired with the 100mm Vertical Flue Kit (Part No. 3319235) and Vertical Starter (Part No. 3318079) is the higher-output version of the popular E-Combi ONE leisure pack, designed for larger static caravans, holiday lodges, and park homes that need the additional domestic hot water and heating capacity of a 30 kW boiler. Like the 24 kW variant, it uses the 3319235 100mm-terminal vertical flue kit — the specialist leisure-market flue that fits existing 100mm roof penetrations left by older Morco and Worcester Bosch boilers, eliminating any need to disturb the roof structure on a changeover. Backed by Ariston's patented XtraTech™ stainless steel heat exchanger, 94% seasonal efficiency, and a 1:7 modulation ratio, the 30 kW model delivers a 12.5 l/min DHW flow rate — meaningfully better than the 24 kW unit for properties with two shower rooms or higher simultaneous hot water demand. The LPG conversion kit is included as standard, making it directly suitable for sites on bottled propane.
- Ariston E-Combi ONE 30 kW Combi Boiler — Part No. 3301132
- 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 — do not use standard Ariston 125mm domestic flashings), flue support brackets (3318015 recommended per extension), and any additional Ø60/100 extension pipes if the ceiling height requires them.
The 3319235 uses a 100mm-diameter terminal purpose-built for the leisure market, where Morco and Worcester Bosch boilers historically used 100mm roof penetrations. Replacing either brand on an existing site with this pack requires no roof or ceiling structural work — the terminal passes through the existing aperture and cowl, making changeover faster and cheaper on a managed holiday park with multiple units.
The step from 24 kW to 30 kW increases maximum DHW heat output from 26 kW to 30 kW and flow rate from 10.4 to 12.5 l/min at ΔT35°C. For a holiday lodge with two shower rooms, or a large static caravan where guests frequently use the bathroom simultaneously, this difference prevents the flow temperature drop and reduced pressure that a 24 kW unit would experience under peak demand.
Ariston's patented single-coil XtraTech™ stainless steel heat exchanger features wider waterways than conventional copper alternatives, improving long-term resistance to limescale and corrosion — important on leisure properties where water treatment may not be as consistently maintained as in a permanent domestic system, and where the boiler may stand idle between letting seasons.
An LPG conversion kit is included as standard in every E-Combi ONE box. The conversion to propane (G31) is completed at commissioning by the Gas Safe engineer with no additional parts. Holiday parks and caravan sites typically operate on bulk LPG tanks or cylinder manifolds — this boiler is ready for those setups without further hardware.
The AUTO function continuously monitors heating system behaviour and automatically adjusts boiler output and pump speed to match actual demand. In holiday letting use, where occupancy varies from busy peak weeks to empty off-season periods, this prevents energy waste without requiring owners or guests to reconfigure settings between visits.
A 1:7 modulation ratio allows the 30 kW boiler to turn down to approximately 4.3 kW minimum output, avoiding disruptive short-cycling in well-heated spaces. At 51 dB (Band XL), audible noise is minimised — a meaningful advantage in the thin-walled construction of static caravans and lodges where mechanical noise transfers easily between rooms.
| Technical Specifications — E-Combi ONE 30 kW (3301132) | |
|---|---|
| Parameter | Value |
| Boiler Part Number | 3301132 |
| ErP Energy Rating | A / A (Heating / DHW) |
| Seasonal Space Heating Efficiency | 94% |
| Water Heating Energy Efficiency | 82% |
| SAP 2009/2012 Efficiency | 89.4% |
| CH Heat Output (Max) | 28 kW |
| DHW Heat Output (Max) | 30 kW |
| DHW Flow Rate ΔT 35°C | 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 |
| Min DHW Flow Rate | 2 l/min |
| DHW Pressure Min / Max | 0.2 / 7.0 bar |
| Built-in Expansion Vessel | 8 litres |
| Noise Level | 51 dB / Band XL |
| NOx Emissions | 51 mg/kWh |
| Boiler Weight | 31.9 kg |
| Dimensions H × W × D | 745 × 400 × 385 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 |
| Max Vertical Flue Run — 30 kW on Ø60/100 | 7 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) / 3318081 (red, 125mm) — not this kit |
| Roof Flashing | Not included — must suit existing 100mm penetration; standard Ariston domestic flashings are 125mm and will not seal on this terminal |
