Worcester Bosch Greenstar 18Ri Heat Only Gas Boiler 18kW
Product code: 394638
Worcester Bosch Greenstar 18Ri Heat Only Gas Boiler 18kW
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Product Information
The Worcester Bosch Greenstar 18Ri is a wall mounted, heat only gas fired condensing boiler designed for traditional heating systems with a hot water cylinder and cold water storage tank. It delivers a central heating output of 18kW, making it suitable for medium sized properties with moderate heating demands.
This compact boiler measures 600mm (H) x 390mm (W) x 270mm (D), allowing installation inside a standard kitchen cupboard. It operates on natural gas and can be converted for LPG use. The unit features simple temperature controls and a clear operational status indicator for ease of use.
The Greenstar 18Ri is ErP A-rated with a seasonal efficiency of approximately 92%. It supports up to 20% hydrogen blend for future energy transition and is compatible with Worcester Greenskies solar panels. Flexible flueing options enable versatile installation, and frost protection is included for colder locations such as garages or lofts.
- 18kW central heating output for medium-sized homes
- Compact size: 600mm (H) x 390mm (W) x 270mm (D)
- ErP A-rated efficiency with 92% seasonal performance
- Operates on natural gas and LPG with conversion kit
- Supports up to 20% hydrogen blend for future readiness
Specifications
| Brand | Worcester |
|---|---|
| Width | 390 mm |
| Energy Rating | Not Selected |
| Depth | 270 mm |
| Flue Included | No |
| Fuel Type | Gas |
| Heating Energy Rating | A |
| Heating Type | Heat Only |
| Height | 600 mm |
| Heating Output | 18 kW |
| Model Name / No | 7733600309 |
| Weight | 27.4 kg |
| Colour | White |
| Mount Type | Wall Mounted |
| Hydrogen Ready | Yes |
| NOx Class | Class 5 (Low NOx Emissions) |
| Residential Warranty | Up to 10 years (with conditions) |
| Sound Power Level (dB A): | 50 dB |
Delivery & Returns
- Delivery cost will be calculated at checkout once delivery address has been confirmed
- Delivery lead times are an estimate only
- Delivery drivers will always prioritise safety over convenience when offloading materials
- Bagged products such as cement and plaster cannot be returned once opened
- Jumbo bags cannot be returned once delivered
- All other goods may be returned within 3 months with a proof of purchase provided
- Chargeable pallets may be returned for a full refund
- All online pricing is specific to Northern Ireland only. Pricing for our Isle of Man branch may vary.
Find out more
Product Information
Product Description
The Worcester Bosch Greenstar 18Ri is a wall mounted, heat only gas fired condensing boiler designed for traditional heating systems with a hot water cylinder and cold water storage tank. It delivers a central heating output of 18kW, making it suitable for medium sized properties with moderate heating demands.
This compact boiler measures 600mm (H) x 390mm (W) x 270mm (D), allowing installation inside a standard kitchen cupboard. It operates on natural gas and can be converted for LPG use. The unit features simple temperature controls and a clear operational status indicator for ease of use.
The Greenstar 18Ri is ErP A-rated with a seasonal efficiency of approximately 92%. It supports up to 20% hydrogen blend for future energy transition and is compatible with Worcester Greenskies solar panels. Flexible flueing options enable versatile installation, and frost protection is included for colder locations such as garages or lofts.
Key Features
- 18kW central heating output for medium-sized homes
- Compact size: 600mm (H) x 390mm (W) x 270mm (D)
- ErP A-rated efficiency with 92% seasonal performance
- Operates on natural gas and LPG with conversion kit
- Supports up to 20% hydrogen blend for future readiness
Specifications
| Brand | Worcester |
|---|---|
| Width | 390 mm |
| Energy Rating | Not Selected |
| Depth | 270 mm |
| Flue Included | No |
| Fuel Type | Gas |
| Heating Energy Rating | A |
| Heating Type | Heat Only |
| Height | 600 mm |
| Heating Output | 18 kW |
| Model Name / No | 7733600309 |
| Weight | 27.4 kg |
| Colour | White |
| Mount Type | Wall Mounted |
| Hydrogen Ready | Yes |
| NOx Class | Class 5 (Low NOx Emissions) |
| Residential Warranty | Up to 10 years (with conditions) |
| Sound Power Level (dB A): | 50 dB |
Delivery & Returns
- Delivery cost will be calculated at checkout once delivery address has been confirmed
- Delivery lead times are an estimate only
- Delivery drivers will always prioritise safety over convenience when offloading materials
- Bagged products such as cement and plaster cannot be returned once opened
- Jumbo bags cannot be returned once delivered
- All other goods may be returned within 3 months with a proof of purchase provided
- Chargeable pallets may be returned for a full refund
- All online pricing is specific to Northern Ireland only. Pricing for our Isle of Man branch may vary.
Find out more
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