Combi Boiler

Combi boiler is a popular choice in UK homes, and for good reason. A combi boiler is both cost effective and high in efficiency, making them the number one choice when it comes to boilers for domestic use.

The combi boiler is both a water heater and a central heating boiler, hence the name ‘Combi’. This means that you get two features within one compact system. With this type of boiler, you do not require a separate hot water cylinder, which allows homeowners to save space within their property.

Combi boilers deliver hot water to the taps and showers, so that users are able to enjoy warm water without the need of a pump. Other benefits which make combi boilers a favourite is that they are relatively easy to install, and saves a person both time and money, since it does not require a tank to be fitted or additional pipes that go along with it. Here we are going to take a quick look at three of the best combination boiler brands out there.

Which is the right combi boiler for me?

The combination or ‘combi’ boiler takes its name from its dual function: it’s a high-efficiency water heater and a central heating boiler combined in one compact unit. They provide heating and hot water directly from the boiler, which means almost immediate hot water. A combi boiler will suit your home if… You have a smaller property, perhaps with a single bathroom, and fewer people in it. This is because the smaller unit means a big tank or cylinder will otherwise take up valuable space, and water pressure can decrease if more than one person uses the water. For Best Combination Boilers in 2018 visit here.

To find the right boiler for your circumstance, house and family size it is best to discuss it with our team of boiler experts.

Which combi boiler should I choose?

There are two main things to consider before you buy a combi boiler, they are:

  1. lower tap flow (if more than one tap or appliance is being used at a time, a very slight pressure decrease can occur) and;
  2. whether you have more than one bathroom. If you do then you might need a larger model. These tend to be better at mitigating any pressure loss if the system is under any strain.

Because of the clever space-saving design and swift water heating function, combi boilers are the most popular type in the UK, accounting for over half of all new domestic boilers per year. A combi boiler works by supplying limitless on-demand central heating and hot water directly from the boiler. The water comes directly from the mains, so that water is constantly available, and at a high water pressure. To find the right boiler for your circumstance, house and family size it is best to discuss it with our team of boiler experts.

What are the main benefits of a combi boiler?

Combi is quicker & cheaper

There are fewer parts and pipes in a combi central heating system; they tend to come near enough pre-assembled. Fitting tends to be fairly straightforward and no tank in the roof space means less pipe work. Time is money, therefore reduced set-up time means more money in your pocket.


No bulky storage container, and no need for a separate cold water tank or hot water cylinder in the loft. Combination boilers tend to be smaller, meaning less space is taken up. They fit easily into kitchens and storage cupboards. This type of boiler can be especially helpful if you are a landlord and have tenants living in your property. We offer a full boiler and service plans for Landords.

Better water pressure and power showers

Because combinations use water that feeds straight from the mains, the pressure stays high even after extended and heavy usage and hot water is delivered – almost immediately – at mains pressure with no need for a pump so showers can be enjoyed all the time.

Bigger, more extensive range

Combi boilers are growing in popularity, because of this, boiler manufacturer’s like Vaillant and Worcester offer a wide range of models to suit any home. Well-sized boilers are also more efficient than over or undersized boilers.

What should I consider before I buy a new combi boiler for my home?

Do you need a complete overhaul for the old boiler stocked away in your airing cupboard?

Are you really fed up with the starting problems that are a nuisance for your boiler? If you answered yes to any or both of these questions, you are ready to invest in a new boiler. Even better, choose a combination boiler to get a more technologically advanced result for your homes or offices.

The gas combination boiler or also known as the Combi boiler is the most efficient of the lot. For starters, it is a combination of a traditional heating unit and hot water cistern. So you can run your central heating and get hot water with just one device!

This saves up a lot of space. So, it is an ideal solution for houses with short storage spaces. You only need a space for the device and do not have to put in a separate cylinder for hot water or a feed cistern for the cold water. There might be just one small con related to the device. You will have to wait for a short time after turning on the tap for the water to turn hot. This of course also depends on the boiler’s model and capacity of how fast it can heat the cold water.

Which is the best combi boiler on the market?

Recent polls by several websites and online retailers have consistently churned out that Vaillant and Worcester Bosch are the two main contenders for the best combination boilers in the market. The brands individually have made a name for themselves in the market for durability, reliability and affordability. The energy efficiency for the devices are also quite ahead of any of the other competitors. Here is a rundown for why each of these is considered best in the field.

You can take your pick from a range of combination type boilers depending on whether you want it oil fuelled or gas fuelled.

Worcester Bosch Boilers

Worcester Bosch Boilers

Greenstar I – one of the most popular models in the series of boilers (combi) offered by the brand. Best suited for smaller to medium sized homes. Provides a water pressure that can fill up a standard kitchen sink in about 45 seconds. A gas-fuelled device.

Greenstar Si Compact – This model is one of the most space saving varieties of boilers in the market. It is easily stored away within the dimensions of a standard sized kitchen cupboard. Suitable for smaller homes or medium sized home plans.

Greenstar CDi Classic – it is the larger variety of boiler (Combi) available in the market. The top of the range model under the brand’s umbrella. It is suitable for the larger homes with a good amount of storage space. Equips houses with two bathrooms and provides a water pressure that can fill a standard sized kitchen sink in about 32 seconds. A gas-fuelled model. This series also offers the GreenStar CDi Compact, which is a smaller variation on the same type of boiler functionality. It however provides a water pressure to fill up a kitchen sink in 37 seconds and can outfit homes with more than one bathroom.

GreenStar CDi HighFlow – Worcester Bosch’s floor standing variation of a combination type boiler. This one is designed for larger homes with more than two large bathrooms. It can fill up a kitchen sink within 19 seconds. It is also a gas-fuelled model.

GreenStar Heatslave series – The brand offers two different varieties of oil fuelled combination type boiler. The Heatslave series offers the Heatslave II and Heatslave external models. Both are suitable for all kinds of home sizes ranging from small to the largest.

Vaillant Boilers

Vaillant Boilers

Vaillant has emerged as a strong contender in the market for boilers of every type. They are especially popular for their Ecotec series of combination boilers. The company has a worldwide presence and is famous for its brand value and quality assurance.

The company has also made a mark as one of the few brands in the market that manufactures heating products that function on renewable sources of energy. Some of the most popular boilers (combi) introduced by this brand are as follows.

EcoTEC exclusive – It offers the 32 and 38 kW range under this series. The brand offers an extended warranty on the product from us an authentic Vaillant Advance partner. It has an electronically controllable low energy modified pump, which reduces the energy consumption of the device. It is popular for its ease of use and it comes with a backlit display. This makes it comfortable to use even in dark storage spaces.

EcoTEC Plus combination boiler – this series offers the 25, 32, 35 and 38 kW output variations. They are also very easy to control and extremely stylish devices. They are also available in LPG fuelled varieties for areas that do not have a gas supply. You can also get an extended warranty on these products if you install it via a Vaillant Advance partner. The product is also ErP rated A.