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Compare Warmflow Boiler Reviews


For 45 years, Warmflow has been making award-winning oil-fired boilers in Northern Ireland. The line of boilers includes leading innovations like the first double A-rated combi boiler as well as other heating components like heat pumps and cylinders.

The manufacturer is dedicated to unrivalled quality and owns a state-of-the-art production facility in Lisburn, North Ireland where all the magic happens.

Every boiler is a reflection of the company’s vision, mission and their dedication to providing sustainable heating solutions to all their customers. Warmflow boilers are made using high-quality materials and are easy to install. The boilers are designed to offer tangible benefits and cost savings.

To guarantee the best possible experience, each Warmflow boiler is fitted with a high-quality Riello burner for reliability and undeniable quality. You also get to enjoy one of the most versatile plastic flue systems in the market today.

Typical Warmflow Boiler Prices

Warmflow has plenty going for them. They have a broad range of boilers you can pick from. Each boiler is carefully designed to solve different heating needs in the market and tuned for efficiency and easy installation.

The range of boilers varies and includes combi, system and regular boilers all of which are oil-fired. To buy one of Warmflow’s boilers, expect to spend about £1,050 to £2,200.

They are not the cheapest boilers in the market but, you get value for your money, given the quality and reliability that Warmflow has come to be known for.

Once you choose your preferred boiler, don’t forget that the boiler is only as good as the installation. Even the best boiler will have problems giving a good performance if the installation is poor. You need to get a good OFTEC registered installer to set up the boiler for you.

To avoid being taken advantage of, get quotes from different installers to see how much they charge and compare to get an idea of the most reasonable price to pay for your boiler. We can help you get the free, no-obligation quotes by filling out a quick enquiry. We will connect you with installers in your area who will send you the quotes at no cost.

Why Choose a Warmflow Boiler?

Each boiler has a unique approach to marketing their products. Instead of focusing on one aspect of their boilers, Warmflow has adopted a multi-pronged approach that gives their boilers superior performance.

They are one of the best-established oil boiler manufacturers in the UK. Considering there are over 4 million homes across the UK that are not connected to the gas grid, it’s safe to say that the oil boiler market is still thriving.

With the Warmflow range of boilers, buyers can finally enjoy the same benefits that gas boiler owners enjoy like efficiency and reliability.

Benefits of Choosing a Warmflow Boiler

Over 45 years of heating homes

The one aspect of manufacturing that can never be compensated for by any other thing other than time is experience. You always have to appreciate the time a company has been around. Not only does this give the brand an edge, but it also shows that their products can stand the test of time and they have goals to continue growing their products and improving them. Warmflow has been operating for over 45 years and is now a market leader in oil boiler production.

Market-leading innovation

Warmflow has built its name through hard work and constant research. The boiler brand has managed to launch some innovative technologies and currently have the only double-A rated combi boiler in the UK and Ireland. Their diverse plastic flue system is the most versatile in the market today and the boiler comes with an in-built temperature control to guarantee complete safety when using the boiler.

Long Warranties

Most users consider warranties as a great way of relieving the pressure that comes with owning a new appliance. But they are also a show of faith the manufacturer has in its products. Warmflow offers warranties of between 5-7 years with its range of boilers. Compared with what other competitors offer, it’s safe to say the brand has a lot of faith in the products they have in the market.

Installer friendly

Any reputable boiler manufacturer understands that the installers are just as important as the users. A boiler that is easy to install gets a lot of referrals from the installer and it saves you money in installation fees which are a significant cost when you’re buying and installing a new boiler.

Warmflow Boiler Warranty

Warmflow offers favourable warranties with every boiler purchase to provide the buyer with complete peace of mind. Each boiler you buy comes with a 24-month warranty from the date of manufacture.

If you purchase the combi boiler, the water jacket and thermal store come with a guarantee of up to 5 years from the date of manufacture as well. However, the warranty doesn’t cover the burner, handling, labour or shipping.

What’s covered by the warranty?

As long as the warranty is active, your boiler and parts which include the controls, plate heat exchangers and other associated components within the boiler casing like the burner and flue (if these are supplied by Warmflow) are covered by the warranty.

How to extend the warranty

To continue enjoying the comfort and peace that comes with knowing you have a warranty in place, you can extend it. By following simple steps, you can extend the warranty to 5 or 7 years for the heat exchanger. You can apply online on the company’s website to qualify for the extended warranty.

Some of the boilers like the Warmflow Titanium range also comes with an enhanced 5-year warranty on parts and labour.

Terms and conditions

It’s important to read the fine print and understand what you need to do to keep the warranty active for its full length.

Warmflow requires that you have the boiler installed and commissioned by a Warmflow engineer. If not, the boiler should be installed by an OFTEC registered engineer. After completing the installation, you need to complete and return the guarantee registration form to the manufacturer within 30 days.

You will also need to keep your boiler serviced every 12 months by a Warmflow or OFTEC registered engineer and have all the relevant paperwork ready.

How to register the warranty

There are two ways you can register and activate the warranty. You can either fill and return the guarantee registration form and send it back to Warmflow or, register online through the Warmflow website.

Compare Our Range of Boilers

You can own a piece of the engineering excellence that Warmflow boilers provide. With a variety of boilers to choose from, getting the right boiler for your home has never been easier.

When choosing a boiler, prioritise the output and size of the boiler above the price. You will also need to shop around to get the best prices both for the boiler and the installation cost.

Warmflow Combi boiler range

Warmflow combi boilers have lost most of the weight and replaced with power. The compact boilers will easily fit in a kitchen cabinet while comfortably supplying hot water to the entire house. They have the ability to produce up to 18 litres of hot water each minute which more than most average homes can consume.

To future-proof the boiler, they come with the latest twin pump technology and an integral thermal heat store inside the boiler casing. They provide hot water on demand saving you money on your energy bill and saving your house some space.

The Warmflow range of boilers has a unique finish with a pre-coated white casing that will blend nicely with the rest of the interior décor.

You also get to enjoy the easy access and servicing features this range of boiler offers and the top-quality parts like the Riello burner.

If you don’t have enough space to squeeze in the boiler inside the house, Warmflow has the Kabin Pak combi which is an outdoor variety.

If you’ve not had a boiler because of lack of space or price, Warmflow has a solution. You can choose from their wide range of combi boilers built to suit all kinds of requirements.

Benefits of a Utility HE Combi oil boiler (indoor)

  • Compact size and design ideal for small properties.
  • Perfect for homes with little or no loft space.
  • Does not use a hot water cylinder.
  • Does not use a cold-water storage tank.
  • No risk of loft pipework freezing.
  • Less pipework, easier and cheaper installation and servicing.
  • It comes with a circulating pump, filling loop, 12 litre expansion vessel and a pressure gauge.
  • Integral thermostatic mixing valve.
  • Works with both conventional and multi-optional flues.
  • Balanced flue system.
  • 7-day digital programmer (optional).
  • Has a Riello RDB2.2 burner.

Benefits of the Kabin Pak Combi boiler (Outdoor)

  • Ideal for properties with limited indoor space.
  • IP45 rated with green weatherproof casing.
  • Front servicing allows maintenance.
  • Has an integral thermostatic mixing valve.
  • Has a multi-optional low-level conventional flue and terminal guard supplied as a standard.
  • ErP A-rated.
  • Ideal for new or replacement installation.
  • It comes with the circulating pump, pressure gauge, filling loop and a 12-litre expansion vessel.

Compare Warmflow combi boiler prices

Whether you’re choosing an indoor or outdoor boiler, budgeting is an essential part of the process and you need to do it carefully.

Once you have an idea of the type of boiler you want for your home, sample different areas to see the prices they offer. This could save you money.

You should also search for a good boiler installation engineer. In this case, you should ask for quotes from the different installers to get the price range. We can help you get new Warmflow boiler installation quotes if you send us an enquiry.

For a breakdown of the prices of different Warmflow combi boilers, have a look at the table below:

Warmflow System oil boiler range

The Warmflow range of system boilers is perfect for large homes that don’t have space in the loft for a cold-water storage tank. The boiler is fed water directly from the mains but, it uses a hot water cistern to keep up with the demands of the home

The boiler comes with a system kit that has a pre-assembled water cistern, a pressure gauge, a pressure hose and a filling loop. The easy to install system makes it easy for you to have hot water in your home at all times.

If you don’t have enough space for the boiler and the cistern, Warmflow also offers an outdoor system boiler option that works the same way as its indoor counterpart. It comes with the same features and components and additional options to help it withstand the weather outdoors.

The indoor and outdoor varieties are available in various output models: 15-21kW, 21-26kW and 26-33kW.

Benefits of Utility HE System boilers (indoor)

  • The system boiler is perfect for homes with more than one bathroom.
  • Hot water is supplied evenly to all taps at the same time.
  • You don’t run the risk of having pipes or tanks leaking or freezing in the loft.
  • Energy-efficient for lower fuel bills.
  • The boiler comes with a 5-year warranty.
  • Multi-operational Flue systems that come as a standard.
  • Comes with the thermostat and terminal guard.
  • ErP A-rated.
  • Perfect for new or replacement installation.
  • Easily converted to conventional flue.

Benefits of the KabinPak system boiler (outdoor)

  • Works for homes with limited indoor space.
  • Can supply water to more than one bathroom.
  • Hot water is supplied to all the types evenly.
  • The boiler is energy efficient for lower fuel bills.
  • Comes with a 5-year warranty.
  • It’s fully protected with high-quality olive-green casing.
  • Multiple flue options that come as a standard.
  • Fitted with a Riello RDB burner for reliability.
  • No risk of frozen pipes or leaks in the loft.

Compare the Warmflow System boiler prices

What you’re willing to spend on your boiler should not only be determined by how much you want to spend on the boiler. It should also depend on what you want the boiler to do.

If you’re uncertain, it’s always a good idea to speak to a professional who will help you pick the right boiler for your home. Before buying the boiler, make sure you compare prices and the installation quotes from different installers.

Get quotes for a new Warmflow boiler by filling a quick enquiry form. You can also compare the complete range of Warmflow boiler system prices below:

Warmflow Regular oil boilers range

Regular boilers are not as popular as system and combi boilers. But they haven’t lost their role in the heating world. They are perfect for homes that have traditional heating in place and need substantial amounts of hot water.

Regular boilers take up more installation space than system or combi boilers. That’s because they come with a cold storage water tank and a hot water cistern. The cold-water storage tanks prove essential for homes in areas with low water pressure.

In addition to the benefits that come with regular boilers, Warmflow has a few unique additions to give their range an edge. Their boilers are compact in size and have a smart design. They look impressive in any home and come with options that readily fit into the kitchen cabinet.

The boilers come in three different types of installation options each option has three outputs to choose from making it easier for you to find a boiler that will work within your requirements.

Benefits of Warmflow regular oil boilers

  • Has outputs of up to 33kW.
  • Comes in a blue leather grain casing.
  • Compact boiler with robust abilities.
  • Front servicing access.
  • Suitable for use with conventional flues or with the Multi-optional HE ‘easy fit’.
  • Balanced flue system.
  • Riello burner fitted in all models.

Benefits of Utility HE standard boilers (indoor)

  • Variety of outputs ranging from 15 – 44kW.
  • Designed to fit under standard works surfaces.
  • Has a pre-coated white casing.
  • Front servicing access.
  • Works with conventional and multi-optional flues.
  • Has a balanced flue system.
  • Riello RDB burner comes as a standard.
  • Is fitted with an option 7-day digital programmer.

Compare Warmflow regular oil boiler prices

With so many boilers to choose from, the prices of the boilers also differ. The cost of installation will also vary depending on the boiler you buy and the installation requirements. While Warmflow has done more than enough to cut the cost of installation, the installer has to consider the work needed in your home to get the boiler properly set up.

To get the best boiler installation prices, get quotes for your new Warmflow boiler and compare to see who offers the best prices.

 Warmflow Common Problems and Fault Codes

Boilers are built to last for years. But, for the boiler to last that long, you have to take proper care of it. One of the ways you can do this is by familiarising yourself with the different problems that your boiler might run into.

Understanding what you need to do when your boiler has a problem is key in preventing further damage to the boiler and also cutting back on the cost of fixing the boiler. It could also save you the inconvenience of having to wait for the engineer when you can easily fix the boiler.

This short guide will help you understand your Warmflow boiler better.

Boiler failing to ignite

If there’s an ignition problem with your Warmflow boiler, the reset button will be illuminated. That should alert you that there’s a fault with the oiler and in most cases, the fuel is not getting into the burner.

Suggested fix

You can try resetting the boiler twice. If this doesn’t get the flameworking, you will need an engineer to come in and check for blockages in the fuel lines and other potential problems.

No heat or hot water

When there’s no heat or hot water coming from your boiler, there are a few things that could be going wrong. These include airlocks, diaphragms issues with the thermostat, failure of motorised valves and in some cases low water level.

Suggested fix

Because there are so many things that could go wrong, it’s best to start with the simplest and those that you can handle yourself. Check the boiler pressure or the thermostat. If these seem to be working fine, then you probably have a broken diaphragm, an airlock or a faulty valve. Each of these requires to be replaced so you need to give your installer a call.

Low boiler pressure

Boiler pressure is an issue with all brands of boilers. Sometimes, it could be the result of an overtime loss of pressure and in other cases, leaks are to blame. If you notice your boiler has lost pressure, the best approach is to check for leaks before you try anything.

Suggested fix

If you’re certain there are no leaks, you can use the filling loop to top up water which consequently tops up the pressure. If you suspect a leak, have an engineer come in to assess the boiler and conduct repairs. Leaks have to be repaired quickly because they escalate easily.

Contacting Customer Support


Warmflow Engineering CO Ltd,
Lissue Industrial Estate
Moira Road, Lisburn
BT28 2RF
Northern Ireland

Phone Number:

+44 (0) 28 9262 1515



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