Combi boiler
A combi heats water as you need it and usually avoids a separate hot-water cylinder. Suitability depends on the incoming supply and simultaneous demand; it is important to discuss how bathrooms and taps are used.
A new boiler should suit your home, your hot-water needs and your budget. We’ll help you compare sensible options and give you a clear installation quote.
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We look at your existing heating system, how much hot water you use and where the new boiler will go. That helps us specify a suitable combi, system or regular boiler rather than guessing from the number of bedrooms alone.
Your quote sets out the appliance, controls, agreed pipework and any system cleaning or extra work. We explain access requirements and likely disruption before agreeing a date. After installation we commission the boiler, explain the controls and provide the relevant installation records.
A combi heats water as you need it and usually avoids a separate hot-water cylinder. Suitability depends on the incoming supply and simultaneous demand; it is important to discuss how bathrooms and taps are used.
A system boiler works with a hot-water cylinder. It can suit homes where stored hot water is useful, but the cylinder and controls need to be matched to the property and available space.
A regular boiler is used with a separate cylinder and associated system components, often including tanks. Retaining or changing an existing arrangement needs a survey of the full system and pipework.
Output, hot-water demand, available space and the existing pipework all matter. A bigger boiler is not automatically the right one. Your survey and written quote explain the recommendation.
For a manufacturer’s overview, see Worcester Bosch’s guide to boiler types.
Compare the complete installed specification rather than the boiler price alone. Your quotation should make clear what will be supplied and what needs separate agreement.

Tell us whether you want a straightforward replacement or a new location. A different position can change the flue, condensate and pipework requirements, so it needs a survey.
The appointment or quotation should identify the agreed work, access arrangements and any limitations. If the engineer finds something outside that scope, we explain the options and costs before additional work goes ahead.
A practical guide to the process, with details agreed for your property.
Discuss your current system, hot-water demand, location preferences and budget.
Check the installation requirements and set out the suitable equipment and work.
Agree access, protection, expected interruption to heating and hot water, and the programme.
The engineer completes the appropriate checks and explains operation and the supplied records.
Tell us if you are adding a bathroom, extending or changing radiators. Future changes can affect what is sensible to specify now.
Check the model, controls, cleaning method, filter if proposed, pipework, flue and warranty. A lower headline price may cover a different scope.
Discuss furniture, cupboard alterations, parking and the route for equipment. Clarify making good and work by other trades in advance.
Good to knowUseful details before you decide. If your question is more specific, our team is happy to help.
Our current online range matches MyNextBoiler: Viessmann Vitodens 025-W and 050-W, Ideal Heating i Mini2, Worcester Bosch Greenstar 4000 and Greenstar 8000+. The final choice depends on your home, hot-water demand, installation details and product availability.
Yes. Answer the online quote questions to compare prices for eligible standard replacements. More complex installations and unknown details follow a manual-review route. Prices include VAT and the stated standard installation scope. A survey and written quotation confirm the specification and price before work is agreed.
Warranty length and conditions depend on the exact boiler and installation package. Your written quote will identify the applicable manufacturer’s terms.
Possibly, but it changes the survey and scope. Flue routing, condensate drainage, gas supply, water pipework and access all need to be assessed before a new location is agreed.
Not automatically. We assess the existing heating system and explain any recommended changes. New radiators should only form part of the installation if included in your quote.
It depends on whether the job is a straightforward replacement, a system conversion or a relocation. The expected programme is discussed after the survey.
No specific saving is promised. Bills depend on the existing system, controls, home, usage and energy prices. We focus on specifying and commissioning a suitable installation.
Our Kinmel Bay team reviews the full postcode, job and availability before confirming attendance.

A new boiler, an annual service or a repair. Choose your next step with Corva.