Greenstar 2000 · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Explore Worcester Bosch by arrangement
Start with fuel and the way your home supplies hot water. These guides cover the current directory ranges, with separate pages for meaningful installation arrangements rather than a page for every output or colour. Availability and the installed specification are confirmed after survey.
Gas combi
Greenstar 1000 · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 1000
Combi · Natural gas / LPG Internal wall-mounted
Available options: 24, 30 kW nominal combi options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: Its simple fascia keeps everyday adjustments accessible. The compact wall-mounted format avoids a separate cylinder, while water supply and safe service access still determine suitability.
Key takeaway: A straightforward combi range with a smaller casing to discuss when appliance space and installation budget are priorities.
Available guarantee: 5 years under the current manufacturer schedule when fitted with a Worcester Bosch or third-party system filter. No longer model-specific extension is listed in that schedule. Registration, servicing and the applicable terms remain required; your quotation confirms the eligible package.
Explore Greenstar 1000Greenstar 2000 · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 2000
Combi · Natural gas / LPG Internal wall-mounted
Available options: 25, 30 kW nominal combi options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The slim wall-mounted casing is worth comparing for a kitchen replacement. Separate heating and hot-water figures make it easier to discuss demand without selecting an unnecessarily large heating specification.
Key takeaway: A distinct 25 or 30 kW hot-water choice with the same published heating output, rather than two different heating-load recommendations.
Available guarantee: 7 years under the current manufacturer schedule when fitted with a Worcester Bosch or third-party system filter. No longer model-specific extension is listed in that schedule. Registration, servicing and the applicable terms remain required; your quotation confirms the eligible package.
Explore Greenstar 2000Greenstar 4000 Combi · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 4000 Combi
Combi · Natural gas / LPG Internal wall-mounted
Available options: 25, 30 kW nominal combi options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: Front and removable side-panel access can help the installer plan future maintenance. The on-demand hot-water arrangement releases cylinder space when a surveyed conversion is appropriate.
Key takeaway: The existing 4000 family guide now concentrates on the combi decision and links to the separate cylinder-based System guide.
Available guarantee: Manufacturer standard cover: 7 years. With the qualifying system filter: 8 years. Maximum eligible extended cover: 10 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar 4000 CombiGreenstar CDi Compact · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar CDi Compact
Combi · Natural gas / LPG Internal wall-mounted
Available options: 28, 32, 36 kW hot-water options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: Rear piping and the pre-plumbing jig offer installation flexibility. A shallow casing can matter in a cupboard, but the compartment still needs the clearances required by the exact installation instructions.
Key takeaway: A cupboard-format combi offering three hot-water options without treating each model designation as its heating output.
Available guarantee: Manufacturer standard cover: 7 years. With the qualifying system filter: 8 years. Maximum eligible extended cover: 10 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar CDi CompactGreenstar 8000 F Combi · Internal floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 8000 F Combi
Combi · Natural gas / LPG Internal floor-standing
Available options: 35, 50 kW nominal options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: Touch-button control and a pre-piping roller jig distinguish the floor-standing format. It can retain a floor-level boiler location; assess floor space, lifting access and the water supply before specifying it.
Key takeaway: A floor-standing gas combi to compare where a wall-hung replacement is unsuitable and the calculated demand warrants this range.
Available guarantee: Manufacturer standard cover: 7 years. With the qualifying system filter: 8 years. Maximum eligible extended cover: 10 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar 8000 F CombiGreenstar 8000+ Combi · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 8000+ Combi
Combi · LPG / Natural gas Internal wall-mounted
Available options: 32, 36, 40, 45, 50 kW nominal options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: Rear piping, a pre-plumbing jig and keyless filling link are practical installation and care features. They do not establish that the largest hot-water option suits a home or that an extended guarantee is included.
Key takeaway: The wider white 8000+ combi range; higher nominal hot-water choices must be assessed against the incoming supply.
Available guarantee: Manufacturer standard cover: 8 years. With the qualifying system filter: 10 years. Maximum eligible extended cover: 12 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar 8000+ CombiGreenstar 8000+ Style · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 8000+ Style
Combi · Natural gas Internal wall-mounted
Available options: 32, 36 kW nominal options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The visible casing finish may matter where a boiler cannot be concealed. Compare the current Style options with the wider white 8000+ Combi range before placing appearance ahead of measured heating and hot-water needs.
Key takeaway: The current Style range is a finish-led combi choice; do not confuse it with earlier 8000 Life or Style generations.
Available guarantee: Manufacturer standard cover: 8 years. With the qualifying system filter: 10 years. Maximum eligible extended cover: 12 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Greenstar Heatslave II · Internal floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Heatslave II
Combi · Oil Internal floor-standing
Available options: 12/18, 18/25, 25/32 model bands. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The internal utility format combines space heating and hot water without a separate household cylinder. Front access and the position of the worktop deserve attention when planning servicing.
Key takeaway: An internal oil combi with its own hot-water provision, for a surveyed off-gas installation rather than the gas replacement starting package.
Available guarantee: Manufacturer standard cover: 2 years. With the qualifying system filter: 5 years. Maximum eligible extended cover: 7 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar Heatslave IIGreenstar Heatslave II External · External floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Heatslave II External
Combi · Oil External floor-standing
Available options: 12/18, 18/25, 25/32 model bands. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The external cabinet is intended for outside installation. Moving the appliance outside can release utility space, but the base, condensate, pipe protection and future service access must be designed together.
Key takeaway: An outdoor oil combi that trades indoor appliance space for an assessed external siting and protected pipework plan.
Available guarantee: Manufacturer standard cover: 2 years. With the qualifying system filter: 5 years. Maximum eligible extended cover: 7 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Greenstar 4000 System · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 4000 System
System · Natural gas / LPG Internal wall-mounted
Available options: 12, 15, 18, 21, 24 kW heating options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: A system arrangement brings the boiler and cylinder into one coordinated design. Front service access helps maintenance planning; cylinder recovery, valves and control compatibility still need checking.
Key takeaway: The cylinder-based 4000 choice, with five heating options and a separate stored-hot-water design to assess.
Available guarantee: Manufacturer standard cover: 7 years. With the qualifying system filter: 8 years. Maximum eligible extended cover: 10 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar 4000 SystemGreenstar i System Compact · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar i System Compact
System · LPG / Natural gas Internal wall-mounted
Available options: 27, 30 kW heating options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The shallow casing, rear piping and pre-plumbing jig can help a constrained replacement. Check access and cylinder controls together; a compact appliance does not remove the need for adequate cylinder space.
Key takeaway: A compact system range for an assessed cylinder installation, distinct from the lower-output 4000 System choices.
Available guarantee: Manufacturer standard cover: 7 years. With the qualifying system filter: 8 years. Maximum eligible extended cover: 10 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar i System CompactGreenstar 8000+ System · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 8000+ System
System · LPG / Natural gas Internal wall-mounted
Available options: 30, 35 kW nominal heating options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: Rear piping and the pre-plumbing jig can support a planned replacement. The system design retains a separate cylinder, letting hot-water storage be assessed independently of appliance appearance and guarantee length.
Key takeaway: The 8000+ option for stored hot water; its model labels differ from the published heating figures.
Available guarantee: Manufacturer standard cover: 8 years. With the qualifying system filter: 10 years. Maximum eligible extended cover: 12 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar 8000+ SystemCondens 7000 WP · Wall-hung or floor-mounted with appropriate kit. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Condens 7000 WP
System · Natural gas / LPG Wall-hung or floor-mounted with appropriate kit
Available options: 50, 65 kW domestic nominal options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: Optional mounting arrangements can suit a utility or plant room. The separate pump group, hydraulic design and selected controls belong in the specification; it is not a default replacement for an ordinary domestic boiler.
Key takeaway: A specialist large-domestic option requiring engineered system design; the higher commercial outputs are outside this domestic catalogue.
Available guarantee: 5 years is advertised in the dedicated Condens 7000 WP domestic guide, subject to its terms. The Greenstar filter extension ladder does not establish Condens entitlement. The installation, registration, commissioning and maintenance conditions must be confirmed for the specific domestic project; no longer extension is promised here.
Greenstar Danesmoor System Utility · Internal floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Danesmoor System Utility
System · Oil Internal floor-standing
Available options: 12/18, 18/25, 25/32 model bands. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: An integrated pump reduces the need for a separate external pump in the intended arrangement. Front component access and concealed controls can suit a utility installation, subject to the removable-worktop and service-access requirements.
Key takeaway: An internal oil system boiler for a separate cylinder, distinct from a Heatslave oil combi and a Danesmoor regular installation.
Available guarantee: Manufacturer standard cover: 2 years. With the qualifying system filter: 5 years. Maximum eligible extended cover: 7 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar Danesmoor System UtilityGreenstar Danesmoor External System · External floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Danesmoor External System
System · Oil External floor-standing
Available options: 12/18, 18/25, 25/32 model bands. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The outside cabinet can free indoor space while retaining stored hot water. Its system arrangement differs from the External regular model: the installer must check pumps, cylinder controls and the protected connection routes.
Key takeaway: An outdoor oil system choice retaining a separate cylinder while moving the boiler cabinet out of the home.
Available guarantee: Manufacturer standard cover: 2 years. With the qualifying system filter: 5 years. Maximum eligible extended cover: 7 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Greenstar Ri · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Ri
Regular / heat-only · Natural gas / LPG Internal wall-mounted
Available options: 12, 15, 18, 21, 24 kW heating options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: A compact wall-mounted casing and straightforward flow-temperature adjustment can suit an existing cupboard position. Check the external pump, feed arrangements, cylinder and controls rather than replacing the heat source in isolation.
Key takeaway: The smaller-output Ri family for an assessed regular-boiler replacement; a cylinder and the rest of the existing system remain separate.
Available guarantee: Manufacturer standard cover: 7 years. With the qualifying system filter: 8 years. Maximum eligible extended cover: 10 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar RiGreenstar Ri Compact · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Ri Compact
Regular / heat-only · Natural gas / LPG Internal wall-mounted
Available options: 27, 30 kW heating options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: Pre-formed flow and return pipes can help plan a replacement. Cupboard siting still depends on clearances and the exact connections, and stored hot water still requires a separate cylinder.
Key takeaway: The separate 27 and 30 kW Ri Compact variants, sharing the regular arrangement but requiring their own heating-load assessment.
Available guarantee: Manufacturer standard cover: 7 years. With the qualifying system filter: 8 years. Maximum eligible extended cover: 10 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar Ri CompactGreenstar 8000 F Regular · Internal floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 8000 F Regular
Regular / heat-only · Natural gas / LPG Internal floor-standing
Available options: 35, 50 kW heating options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The roller jig and touch-button controls distinguish it from a wall-mounted Ri replacement. Floor-level access can be useful, but hydraulic separation and lifting and servicing routes need assessment for this larger appliance.
Key takeaway: A floor-standing regular gas range for a designed higher-load system, with external pumping and cylinder arrangements considered separately.
Available guarantee: Manufacturer standard cover: 7 years. With the qualifying system filter: 8 years. Maximum eligible extended cover: 10 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar 8000 F RegularGreenstar 8000+ Regular · Internal wall-mounted. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar 8000+ Regular
Regular / heat-only · Natural gas / LPG Internal wall-mounted
Available options: 30, 35, 40, 45, 50 kW nominal heating options. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The modern wall-mounted format may suit a visible replacement. Compare the actual heating output with calculated heat loss and check the existing cylinder, pump and control arrangement before choosing a larger nominal variant.
Key takeaway: A wall-mounted regular range with five nominal output choices; keep its external system components in the replacement specification.
Available guarantee: Manufacturer standard cover: 8 years. With the qualifying system filter: 10 years. Maximum eligible extended cover: 12 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Greenstar Danesmoor Utility · Internal floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Danesmoor Utility
Regular / heat-only · Oil Internal floor-standing
Available options: 12/18, 18/25, 25/32 model bands. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The narrow utility casing may suit an existing oil-boiler position. Front access and concealed controls support practical siting, while tank condition, oil supply, cylinder and external pump remain part of the survey.
Key takeaway: The internal regular oil range, keeping the pump and stored-hot-water system separate from the boiler.
Available guarantee: Manufacturer standard cover: 2 years. With the qualifying system filter: 5 years. Maximum eligible extended cover: 7 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar Danesmoor UtilityGreenstar Utility Regular · Internal floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Utility Regular
Regular / heat-only · Oil Internal floor-standing
Available options: 32/50, 50/70 model bands. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: The two higher-output bands distinguish it from the smaller Danesmoor Utility. Its larger floor-standing cabinet needs planned access, a suitable flue and a hydraulic arrangement matched to the required heating load.
Key takeaway: A larger oil regular range for assessed higher heating loads, not a reason to choose 70 kW without a heat-loss calculation.
Available guarantee: Manufacturer standard cover: 2 years. With the qualifying system filter: 5 years. Maximum eligible extended cover: 7 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Explore Greenstar Utility RegularGreenstar Danesmoor External · External floor-standing. Manufacturer illustration; accessories shown may be optional. Any manufacturer guarantee roundel is conditional and does not confirm SwiftHeat entitlement.
Greenstar Danesmoor External
Regular / heat-only · Oil External floor-standing
Available options: 12/18, 18/25, 25/32 model bands. Nominal labels and rated outputs are distinguished in the guide.
Key benefits: An outdoor cabinet avoids using an indoor utility position. Compare it with the External System variant: pump provision and controls are different decisions, and outdoor pipe protection and condensate design remain essential.
Key takeaway: The external regular oil choice, retaining separate system components and a cylinder while releasing indoor boiler space.
Available guarantee: Manufacturer standard cover: 2 years. With the qualifying system filter: 5 years. Maximum eligible extended cover: 7 years, conditional on a Greenstar System Filter and the qualifying installer loyalty/accreditation arrangement in the manufacturer terms. A System Filter Micro does not qualify for this longer extension. SwiftHeat’s installer status and your package must be confirmed in writing; the maximum is not automatically included.
Current range identities were reconciled against Worcester Bosch’s homeowner and professional directories on 1 October 2026. The Greenstar 1000 remains in the professional current listing even though it is absent from the homeowner listing. Condens coverage is limited to the manufacturer’s 50 and 65 kW domestic options; the commercial range has additional outputs.
Some manufacturer tables are incomplete or inconsistent. Each guide identifies the documentation used and any unresolved figures. Nominal model labels are not a sizing recommendation, and maximum guarantee lengths are conditional. Our quotation confirms the exact appliance, fuel configuration, output, controls, service requirements and eligible guarantee.
We assess heat loss, heating and hot-water requirements, water supply, controls and installation access before recommending an appliance. Bedroom count or a catalogue model number alone cannot establish the right boiler.
Gas Safe registration 978273 · Serving Cardiff, South Wales and across the UK.
