Sealheader

Regular boiler installed in a cupboard, in a white kitchen

Buy a new regular boiler

Buy a new conventional boiler online with flexible monthly instalments on interest-free credit.¹

A regular boiler is perfect if

You already have an existing conventional (regular) boiler. Old radiators may fail under high water pressure delivered by system and combi boilers.
You have low water pressure in your area. A conventional boiler system uses a water storage tank (often stored in the loft) from where the water goes to the hot water cylinder for heating. The flow rate of water from the tank to the cylinder relies on gravity, instead of the mains pressure. This is unlike a system or combi boiler that directly heat water from the mains.
You have a large home where multiple taps and showers are on at the same time and you need an uninterrupted supply of hot water. Regular boilers store hot water in a separate cylinder after, so there’s always some available.

How do regular boilers work?

To maintain the water level needed for your heating, a conventional boiler is linked to a separate cold water storage tank usually found in the loft. When you need hot water, a heat exchanger heats the water from the tank. Heated water is then pumped to a hot water cylinder where it’s stored ready for you to use.

Why buy a regular boiler from us?

Buy a new regular boiler in three easy steps

Find your perfect conventional boiler

You can get an online regular boiler quote in two minutes, or book a free video call with a heating expert.

Book an installation

With boiler installation included in the fixed price of your regular boiler, you can book a timeslot to suit you.

Get your boiler installed

We’ll remove your old boiler, flush your system, install your new one and show you how to use it.

Pay in monthly instalments

We understand paying for a new boiler all at once can be difficult. Our credit broking service gives you the option to pay monthly for your new conventional boiler up to two years at no extra cost with interest-free credit (0% APR)¹. Explore our other options to finance your new regular boiler. We’re a credit broker not a lender.

Explore our options to finance your regular boiler

Boiler types explained: the difference between a regular boiler and a system boiler?

We offer three types of boiler – regular, system, and combi boilers. The major difference between these boiler types is the way they operate:

Regular boilers – (or conventional boilers or heat-only boilers) are linked to a cold water tank kept in the loft. Water is heated by a heat exchanger and then stored in a hot water cylinder ready to be used.
System boilers – have a built-in heat exchanger in the boiler, so water is heated up and stored in a cylinder. A water storage tank in the loft is not needed.
Combi boilers – are not linked to a hot water cylinder or tank in the loft, water is taken directly from the mains and heated by the boiler on demand i.e. when you switch your tap on.

Should you buy a combi boiler or a conventional boiler?

Given that a combi boiler does not require a hot water cylinder, you may find it best to replace your conventional boiler. However, there are a few factors to consider when choosing the best boiler for your home. We recommend sticking to a conventional boiler if:

You have a big and busy home where you need a supply of hot water to multiple outlets at the same time. Unlike a combi boiler, if multiple taps are running there will be minimal effect on water pressure
Water pressure in your area is low
You already have a conventional boiler with older pipework to your radiators

We recommend changing to a combi boiler if:

You don’t need more than two taps or showers running at the same time
You want to save space and use your loft – combi boilers do not need a cold-water storage tank or a hot water cylinder

We know it can be tough to find the best regular boiler for your needs, so we've created a simple online tool to help you discover which boiler best suits your home. You can also read our guide on choosing a boiler.

Learn, explore & compare boilers

Boiler guides

Boiler Types

A guide to what each type of boiler is suitable for

Need to know info

Everything you need to know about central heating

Choosing a boiler

How to choose the right boiler for your home

Are electric boilers right for you?

Gas vs electric Boilers

Boiler help

Fixing common issues with your boiler

Money saving tip

Adjust your flow temperature for extra savings

What size of regular boiler do I need?

The size of the regular boiler you need depends on your heating demand, which means the number of rooms and radiators in your home, as well as the number of bathrooms and hot taps running at the same time.

If you have one or two bedrooms, you will most likely need a boiler between 12-18 kWs. If you have three or four bedrooms you will need a boiler between 18-35 kWs and for a home with more than four bedrooms a boiler over 35 kWs will be most appropriate. Each radiator in your house adds an extra 1-2 kWs. Find out more about what size boiler you will need.

Should I swap my regular boiler for a combi boiler?

Combi boilers are compact and economical, but they may be unfit for large homes that have high demand for hot water. In these cases, regular boilers are often a better option. Regular boilers are also well suited for homes with low water pressure and old pipework.

It is possible to swap a regular boiler for a combi boiler, but it isn't suitable for every home. We recommend that you contact our professional heating team who will provide an expert recommendation.

The legal stuff

¹ E.ON Energy Installation Services Limited acts as a credit broker not a lender and work exclusively with Creation Consumer Finance Limited who acts as the lender. Credit subject to status, terms and conditions apply and can be found at eonenergy.com/terms-and-conditions/eon-installation, E.ON reserves the right to amend its finance offering at any time and may withdraw at short notice. E.ON UK plc is an Introducer Appointed Representative of E.ON Energy Installation Services Limited who are authorised and regulated by the Financial Conduct Authority in relation to credit broking services under number 750410. Registered in England and Wales under company number 09965944 with its registered office at Westwood Way, Westwood Business Park, Coventry, CV4 8LG.

² ${Boiler48hours}

Residential