Gas Combi Boilers

Combi boilers are a water warmer and central heating boiler in one, with no bulky water storage cylinder. They convert cold water to hot on demand when the hot tap is turned on, so you're only using energy for what you need rather than constantly heating a full water tank. 

As there is no water storage, most of the components of a gas combination boiler are within the boiler itself. This space-saving style is popular with homeowners across the board.

The cost of a gas combi boiler varies depending on its capacity and efficiency. Our gas combi boiler prices range from around £500 to £3,000 with a choice of sizes to suit most properties. Homeowners also need to factor installation costs.

Buy a new boiler today to take advantage of our free UK delivery on orders over £75. We also offer the option to Click & Collect from one of our hundreds of nationwide stores. 

We stock a wide range of gas combination boilers from leading brands such as:

One of the best-known names in home heating, Worcester Bosch boilers are highly rated. Choose between models with varied heat output and horizontal or vertical flues. The Worcester Bosch Greenstar 4000 Combi Boiler 30kW is a best-seller, A-rated for energy efficiency and praised for its performance in areas with low water pressure.

If you're looking for a British-made gas combi boiler at a good price, browse the Ideal Heating collection. Their sleek models have a wide range of functions and easy-to-read displays. Look out for their Halo-compatible boilers that can be linked to wireless thermostats for accurate and flexible home heating control.

Rapid and reliable running is a guarantee with Viessmann gas combi boilers. Their models regularly appear in Which? Best Buy lists, and their Vitodens 111-W 32kW Integrated 46L Unvented Cylinder caters to homes with a high demand for hot water.

We've been supplying the plumbing industry and homeowners since the 1980s, so we know what you need from us. It's one of our core values to ensure quality, both in terms of the parts and products we sell and the advice and services we offer. 

Our 5-star Trustpilot reviews from thousands of satisfied customers reflect this.

To save on your new gas combi boiler, download our app and save 15% on your first in-app order. And you can earn points on all City Plumbing purchases by signing up for our rewards scheme. Points can be converted to credit or used to claim further rewards.

With dozens of gas combination boilers at various prices, we've got the right products for you. You can filter by brand, heat output, cost or guarantee depending on your priority. 

Utilise our free UK delivery on orders over £75, or opt for our Click & Collect service if you're not going to be in. 

Any questions about your boiler or our services? Just drop in and speak to us at one of our hundreds of UK-wide branches. Use our branch locator tool to find your nearest showroom.