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Compare system boiler options designed to work with a separate hot-water cylinder. Learn how a system boiler works, who it may suit and which listed models match different heating requirements.
Compare heating output, radiator guidance, warranty information, dimensions and guide prices before requesting a property-specific quotation.
A system boiler provides central heating and heats water stored in a separate hot-water cylinder. Many of the main heating components, such as the pump and expansion vessel, are built into the boiler, helping create a neater system than a traditional open-vent arrangement.
Because hot water is stored in a cylinder, a correctly designed system can support several taps or showers more effectively than an on-demand combi setup. The boiler output, cylinder capacity and system design must still be matched to the household.
Ask About System BoilersThese are general indicators. Final suitability depends on the existing system, heat loss, hot-water needs and installation assessment.
Properties where more than one tap or shower may be used at the same time.
Larger households that benefit from storing hot water ready for use.
Homes with a suitable airing cupboard or other location for a hot-water cylinder.
Like-for-like replacement may reduce unnecessary changes, subject to assessment.
Consider both the boiler and hot-water cylinder arrangement before making a selection.
Tell us about your property, bathrooms, radiator count, current boiler and existing hot-water cylinder. The Boiler Quote form will open with System already selected.
Share details of your existing hot-water cylinder, if you have one, so Heating City can assess whether keeping or replacing it may be suitable.
The form receives the boiler type and, where applicable, the selected brand and model.
Page-specific questions collect the information needed to assess suitability.
Name, phone, email, postcode and preferred installation timing are collected.
A successful submission opens the Boiler Quote confirmation page and alerts Heating City.
Explore other boiler configurations if a separate hot-water cylinder is not the best fit for the property.
A system boiler stores hot water in a separate cylinder, while a combi normally heats hot water on demand without a cylinder.
It can be a strong option for homes with more than one bathroom, but the cylinder size, boiler output and expected simultaneous use must be assessed.
A sealed system normally does not need a feed-and-expansion tank in the loft, although the exact cylinder and system arrangement should be confirmed.
A conversion may be possible, but pipework, water pressure, cylinder type and controls need to be reviewed before quoting.
The final quotation depends on the selected boiler, the condition and capacity of the hot-water cylinder, controls, pipework, system cleaning and any additional installation work identified during assessment.
Choose a listed model or select Help Me Choose. The quote form will preserve System as the selected boiler type.
Complete the guided Boiler Quote form. After successful submission, the customer will be taken to Heating City's dedicated Boiler Quote thank-you page.
For official safety guidelines, regulations, and to verify certified professionals, visit the Gas Safe Register.
An affordable, reliable boiler that doesn’t compromise on quality.
An affordable, reliable boiler that doesn’t compromise on quality.
An affordable, reliable boiler that doesn’t compromise on quality.
An affordable, reliable boiler that doesn’t compromise on quality.
An affordable, reliable boiler that doesn’t compromise on quality.
An affordable, reliable boiler that doesn’t compromise on quality.
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