Home / Combi Boilers
Compare combi boiler options from Navien, Worcester Bosch and Baxi. Learn how a combi boiler works, who it may suit and which models match different heating and hot-water requirements.
Compare heating output, hot-water performance, flow rate, radiator guidance, listed warranty and key dimensions in a cleaner catalogue layout.
A combination boiler, commonly called a combi boiler, provides central heating and hot water from one compact appliance. It heats water when a hot tap or shower is opened, so a separate hot-water cylinder is normally not required.
This compact arrangement is one reason combi boilers are widely considered for homes where space is limited. The correct model and output still depend on the property, radiator count, mains-water performance and expected hot-water demand.
Ask About a Combi BoilerA combi boiler may be suitable where the property and hot-water demand match the output of the selected model. These are general indicators, not a substitute for an engineer's assessment.
Properties that would benefit from avoiding a separate hot-water cylinder or loft tank.
A common consideration for smaller and medium-sized properties, subject to demand and system checks.
Like-for-like replacement may be straightforward, although the existing system and flue still require review.
Homes where the selected boiler's hot-water flow can meet the expected tap and shower usage.
Clear benefits and limitations help customers make an informed decision rather than choosing a boiler from output alone.
Answer a few simple questions about your current boiler, property, bathrooms, radiators and installation plans. The Boiler Quote form will open with Combi already selected.
The quote form is a separate conversion page. It should preserve the selected boiler type, brand and model so customers do not repeat their choices.
The form receives Combi and, where applicable, the selected brand and model.
Customer provides bathrooms, radiators, property type and current boiler information.
Name, phone, email, postcode and preferred installation timeframe are collected.
A successful submission opens the Boiler Quote confirmation page and alerts Heating City.
A different boiler system may be more appropriate where hot-water demand or the existing heating setup does not suit a combi boiler.
The required output depends on the property, radiator count, bathrooms, expected simultaneous hot-water use and mains-water performance. Bedroom count alone is not enough to select the correct model.
It may be possible with an appropriately selected model and suitable mains-water performance, but simultaneous use can reduce flow. Heating City should assess the actual hot-water demand before recommending a model.
A standard combi boiler normally heats water on demand and therefore does not require a separate hot-water cylinder.
A conversion may be possible, but it can require changes to the existing system, pipework and controls. Suitability and additional work should be confirmed through a property assessment.
The quotation is prepared after reviewing the selected boiler, property details, current heating system and installation requirements. Any required additional work should be confirmed clearly before the installation is agreed.
Select a model's Get Quote button or use Help Me Choose. The Boiler Quote form will collect the property and contact information required for Heating City to review the enquiry.
Select a model or complete the guided Boiler Quote form. After a successful submission, you will be taken to Heating City's Boiler Quote thank-you page.
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.
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.
