Oil Combi Boilers

Heating cold water from the mains as and when hot water is required, combi boilers (also known as condensing boilers) have no water storage cylinders like traditional system boilers. The simple and compact design makes them easy to install and popular with homeowners whose space is limited. 

Choosing a condensing oil boiler is a cost-effective way to heat your home. You use only the fuel you need, and oil is a highly efficient power source with over 90% converted into usable energy. 

Our range of oil combi boilers for sale includes models from notable brands such as Firebird, Warmflow and Worcester Bosch. We can cater to a variety of heating requirements with heat output ranging from 18 kW to 36 kW, so you're sure to find a suitable solution.

Order an oil-fired combi boiler today, either to your home or to your nearest City Plumbing branch using our Click & Collect service. Remember that you qualify for free UK delivery when you spend £75 or more.

Save space and reduce possible noise in the home with one of our external oil combi boilers. Fitting your boiler outdoors safeguards your property against damage should oil occasionally leak and makes it easier for engineers to access when a service is due.

Choose one of our compact internal oil combi boilers that are simple to install. An advantage of internal boilers is that any heat loss is automatically repurposed into additional heating for your home.

With over 40 years of experience supplying plumbing products to homeowners and tradespeople, you can trust us to provide expert knowledge and quality products and parts. Excellent service for all our customers is the foundation of our inclusive core values.

Our commitment to ensuring safety, success and satisfaction is reflected in our 5-star  Trustpilot reviews from thousands of happy customers.

Our collection of UK oil boilers covers a range of prices, and you can earn points on your purchase by signing up for My City Plumbing Rewards. Points can be used as credit or to claim other rewards. You can also get 15% off your first in-app order by downloading our app.

We offer the best products from brands you know and trust, so you can be confident when buying a condensing oil boiler from City Plumbing. For extra protection and peace of mind, all these oil combi boilers come with a guarantee of two, five or 10 years.

We're here to help every step of the way, so come in and see us at one of our stores if you have questions about combi oil boilers or our other products and services. 

Take advantage of our free UK delivery on orders over £75. Or use Click & Collect and pick up your boiler from your nearest store at a time to suit you.