Corva’s all-rounder Worcester Bosch combi package for suitable homes.
Product image · final model confirmed in writingThe 30 kW Greenstar 4000 natural-gas combi package with a 10-year manufacturer guarantee, subject to the qualifying filter, registration, annual servicing and Worcester Bosch's terms.
Manufacturer cover: 10-year manufacturer guarantee, subject to the qualifying filter, registration, annual servicing and Worcester Bosch’s applicable terms.
Room count alone does not determine boiler output. Corva confirms suitability after reviewing your home and installation.
The exact inclusions and any extra work are set out in your written quotation.
Use the exact model and serial details when selecting literature. The official manufacturer page is the safest place to check the latest user instructions, display meanings and control information.
Installation and service instructions are for competent professionals. Homeowners should use the user or operating guide and must not remove the boiler casing.
Understand the visible reading and when repeated pressure loss needs attention.
Read guide →Record the complete display message and choose a safe next step.
Read guide →Keep registration, service and handover records organised.
Read guide →Book routine care and mention existing faults before the appointment.
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Good to knowIf you’re not sure what you need, our team can help.
Not until the heating and hot-water requirements and installation details have been checked. The online option is a starting point for eligible replacements; the written specification confirms the appliance and scope.
It is the current starting price for the defined standard package shown on this page, including VAT. Moving the boiler, conversions, special access, extended flues or pipework and other nonstandard work need a separate quotation.
Use the complete model details and, where requested, the serial number or manufacture date. Follow the official manufacturer link on this page and select the user or operating instructions that match your appliance.
Write down the complete code and what the boiler is doing. Follow only the normal homeowner steps in the exact user manual. Do not repeatedly reset a returning fault or remove the casing; arrange a repair assessment.
Follow the appliance and manufacturer-cover requirements. Annual servicing is commonly required for continued manufacturer cover, and the completed record should be kept with your boiler documents.
A new boiler, an annual service or a repair. Choose your next step with Corva.
