Storage Combi Boilers Explained And The Best Brands

Storage combi boilers are revolutionising home heating systems by combining the compact design of combi boilers with the hot water capacity of system boilers. 

Let’s dive into what makes these boilers stand out and which models top the list, so you can find the perfect boiler replacement for your home’s heating and hot water needs.

How Does a Storage Combi Boiler Work

A storage combi boiler is an innovative type of combi boiler that includes a built-in hot water cylinder, called a cylinder loading system or CLS.

This integrated water storage allows the boiler to continuously heat water within the cylinder, meaning hot water can be delivered to all parts of the house when needed for showers, taps, and radiators.

It’s particularly beneficial as a boiler for larger households or those with multiple bathrooms, where simultaneous hot water demands are common.

What Is The Difference Between A Storage Combi Boiler And A Regular Combi

Like a combi boiler, a storage combi boiler gets water from the mains water supply, offering instant hot water when needed. However, this particular type doesn’t utilise a hot water storage tank like a storage combi or a system boiler does.

This feature arguably makes a storage combi replacement more useful than a standard combi boiler unit, especially for households with high hot water demand. 

What Is The Difference Between A Storage Combi Boiler And A System Boiler

Storage combi boilers and system boilers both use hot water tanks, but they function differently. A storage combi boiler has an integrated hot water tank within the boiler unit, while a system boiler uses a separate external cylinder.

The main advantage of the first is its ability to draw water directly from the mains supply. This means it can quickly replenish its hot water store, providing a more consistent supply even during high-demand periods.

In contrast, a system boiler relies solely on its stored hot water and may run out during extended use.

Another key difference is space efficiency. Storage combi boilers, with their integrated tanks, require less installation space compared to system boilers, which need room for a separate hot water cylinder.

Is A Storage Combi Boiler Worth it?

Storage combi boilers can be a great investment for many households. They offer the benefits of both combi and system boilers, providing instant hot water and better flow rates for homes with higher demands.

While they’re typically more expensive upfront, they can lead to energy savings in the long run. 

That said, their worth ultimately depends on your specific needs, home size, and hot water usage patterns.

What Properties Are Storage Combi Boilers Suitable For?

Storage combi boilers are ideal for homes with higher hot water demands. They’re great for properties with multiple bathrooms or where several people need hot water at the same time.

They’re also suitable for homes with low mains water pressure, as the stored hot water can help maintain a steady flow.

What Factors To Consider When Choosing A Storage Combi Boiler

Selecting the right storage combi boiler for your home is crucial for efficient heating and hot water supply. Here are five key factors to keep in mind when making your decision:

Energy efficiency

Look for models with high energy efficiency ratings. A-rated models can save you money on energy bills and reduce your carbon footprint. Consider features like modulating burners that adjust output based on demand, helping maintain efficiency even when you’re not using much hot water.

Size and output

Choose a boiler with the right output for your home’s size and hot water needs. Too small, and you’ll struggle with heating and hot water; too large, and you’ll waste energy. Factor in the number of bathrooms, radiators, and your typical hot water usage to find the right fit.

Brand reputation and reliability

Opt for well-known brands with good reputations for reliability. Check customer reviews and ask installers about their experiences with different models.

A reliable boiler means fewer breakdowns and repairs, saving you hassle and money in the long run.

Warranty and after-sales support

Look for boilers with longer warranties, ideally 5-10 years. This can save you money on potential repairs. Also, consider the manufacturer’s after-sales support. Good customer service and readily available spare parts can make a big difference if issues arise.

Installation and running costs

Factor in both the initial cost of the boiler and installation, as well as long-term running costs. While a cheaper boiler might seem attractive, it could cost more in energy bills or repairs over time. Balance upfront costs with potential savings from an efficient, reliable model.

Ready to upgrade your heating system? Get a free, no-obligation quote from Boiler Central today and take the first step towards a more efficient home.

Best Storage Combi Boiler Brands

Only a handful of manufacturers develop a wide range of storage combi boilers despite their many advantages. Here are our recommendations for the best storage combi models you can find the right one for your needs.

Viessmann Vitodens 111-W

We think the all-around best storage combi boiler available is the Viessmann Vitodens 111-W. With its cylinder loading system that can store up to 46 litres of water, the Vitodens 111-W can meet the high demand for hot water quickly and efficiently.

As a highly efficient boiler available in outputs ranging from 4.7 kW to 35 kW, it can supply instant hot water to multiple parts of the house and can even fill a bath in under 10 minutes!

Not only is it extremely efficient, with a rating of 98%, but the Viessmann Vitodens 111-W also comes with an LCD touchscreen and optional wireless control for easy use around the house.

Viessmann Vitodens 222-F

Similarly to the 111-W, the Vitodens 222-F is another great storage combi model produced by Viessmann. This boiler comes with a stainless steel heat exchanger for maximum efficiency and reliability in heating water.

The Viessmann Vitodens 222-F is available at different prices, with outputs ranging from 19 kW to 35 kW. Its MatriX-Plus burner minimises emissions, making it more friendly for the environment and your finances.

Another great feature of the Vitodens 222-F is its quiet operation, which makes it convenient for different areas within the home. It’s particularly well-suited for kitchens, as its quiet operation won’t disturb anyone.

Although this is a storage combi boiler, meaning it doesn’t need as much space as other types of boilers, the 222-F is slightly bigger than the Vitodens 111-W, making it more suitable for somewhat bigger homes.

Vaillant ecoTEC Plus Combi Store

If you want an alternative to either of the Vitodens boilers, the Vaillant ecoTEC Plus is a great choice. This boiler can supply hot water in just a few seconds and provide it to multiple outlets around the household.

Of the storage combi boilers we listed, the Vaillant ecoTEC Plus is the smallest, so it’s ideal for people who don’t have much space for storage combi boiler installation. It has also been given the Quiet Mark, so you can place it anywhere around your home without worrying about noise.

How Much Does a Storage Combi Boiler Cost?

Prices of a storage combi boiler will differ depending on factors such as the brand, type, and output of the new boiler. Here are the typical prices of the boilers we have listed. You will see that the new boiler cost is generally higher for these specialist units.

Storage combi model	Price range	Maximum warranty
Viessmann Vitodens 111-W	£2,060 – £2,216	12 years
Viessmann Vitodens 222-F	£3,480 – £3,525	12 years
Vaillant ecoTEC Plus	£1,952- £2,503	10 years

We hope that these prices, along with the advantages and disadvantages shown for each of these new boilers, will help you decide whether a storage combi boiler is for you and, if so, which brand is most suitable.

When thinking about cost, you should also take into account the running cost of a new unit.

The running costs of a storage combi boiler are higher than that of a standard combi model, mainly due to the fact that it can utilise multiple methods of getting heating and hot water.

With this type of boiler, you pay for the water to be instantly heated and to keep it continuously heated while it’s in the hot water cylinder.

Why You Should Get a Storage Combi Boiler

Storage combi boilers offer a unique combination of benefits that traditional system or combi boilers can’t match. They offer better flow rates and can serve multiple taps simultaneously without compromising on space efficiency.

While these models are well-suited for smaller properties, some can also meet the demands of larger homes, like the Viessmann Vitodens 222-F.

Summary

In conclusion, storage combi boilers offer a compelling solution for homeowners looking to upgrade their heating systems. They combine the best features of combi and system boilers, providing instant hot water and better flow rates, especially for homes with higher demands. 

While brands like Viessmann and Vaillant lead the market with efficient and reliable models, you should consider factors such as energy efficiency, size, and long-term costs when making your choice. Whether you have a smaller property or a larger home with multiple bathrooms, there’s likely a storage combi boiler that can meet your needs.