The 10 Best System Boilers of 2023 (Pros & Cons)

The 10 Best System Boilers of 2023 – System boilers are typically found in modern homes with several bathrooms and operate with unvented hot water cylinders. They can also be utilized as a substitute for heat-only boilers and can be used with regular cylinders or combi boilers in situations where you need more hot water. Your best machine boiler will be determined by the size of your home and your budget. In this guide, we’ll introduce you to some of the best system boilers, as well as details on their benefits and drawbacks, as well as specifications for 10 different system boiler models from various leading manufacturers.

 

Different Types of Boilers

If you need to replace your boiler, we will help you choose the right boiler for your needs and budget. Our guide to the best system boilers in 2021 does the legwork for you by examining the best boilers for a specific reason.

These days, all modern boilers are condensing boilers. Since condensing boilers are so similar, it’s important to pay attention to every detail. To put this article together, we looked at the internal components used in each of these boilers and how that explains their consistency and long-term performance.

Before we get into the topics, let’s go through the different types of boilers that are available.

• System boiler: A system boiler, like a traditional boiler, requires a hot water storage tank but not a water container. This is due to the fact that the system’s main components, such as the expansion vessel and pump, are pre-assembled. System boilers are typically easier to maintain because they do not need a tank, eliminating the risk of leaks or damage. A machine boiler can be appropriate if you don’t have enough space for a tank but have several bathrooms.
• The combi boiler: The combination boiler is small and highly effective, making it ideal for small spaces or properties without enough room for a boiler. These boilers serve as a central heating system as well as a water heater. They do not require a hot water storage vessel or a cold water container because they heat water directly from the pipes. However, it is essential to remember that a combi boiler cannot run two showers or baths at the same time, so this type might not be suitable for households with several bathrooms.
• The conventional boiler: Conventional boilers, also identified as regular or traditional boilers, contain both a water storage tank and a cylinder, necessitating more space. Traditional boilers are ideal for larger households because they can simultaneously supply vast amounts of hot water to multiple bathrooms and taps. They’re also compatible with solar thermal systems, making them a cost-effective option.

 

Buying Guide for the Best System Boiler

Several factors should be taken into account when choosing the correct boiler. If you’re replacing an old boiler in your new home or buying one for the first time, the following considerations will help you choose the best boiler for your needs. It’s important to remember that only a professional and knowledgeable gas engineer will advise you on the appropriate boiler for your home and requirements.

 

Efficiency

Your boiler will estimate about 60% of your home’s CO2 emissions if you have central gas heating. This gives your boiler of choice a significant advantage if you want to reduce your energy bills and carbon footprint. The efficiency of a boiler is an important consideration in our boiler reviews. When it comes to modern condensing boilers, there isn’t much difference in boiler efficiency; in reality, most will be about 90% efficient. By substituting an old non-condensing boiler with a new condensing system, you can increase performance by up to a third. It also helps you save money on your utility bills. However, selecting the right type and size boiler for your home is crucial to getting the most powerful modern boiler.

 

Size of Property

The type of boiler you select will be determined by the number of areas you have and the size of your home. Your boiler will most likely be the central source of heating for your home in addition to generating hot water, so you’ll want to get one that’s large enough to heat the whole place. The size of a domestic boiler is measured in terms of heat output, which can range from 5 to 40 kW.

 

Hot Water

The type of boiler you require is also determined by how much hot water you use. If there is a need for hot water at several outlets at the same time, a traditional boiler or a system boiler with a hot water cylinder might be more appropriate than a combi boiler; although, this is dependent on the amount of space available.

 

Existing System

It’s also important to think about your current boiler system. Do you want to maintain your current system or will a modified boiler be more suitable for your home? Maintaining the same method is more effective and less expensive in the vast majority of cases. However, there are times when switching to a new system will save money in the long run and help a household operate more efficiently. Traditional homes may choose to replace their boiler with a new one.

 

Heat Loss

It’s pointless to have a good boiler and heating system if the majority of the heat it generates escapes your house. This is not only dissipation of energy, but it can also result in a shockingly large bill from your electricity provider.

There is a method that can be applied to determine how much heat your home is losing. It considers the size of the space, the number of radiators, doors, and windows, as well as the insulation quality of your house. A professional will estimate how much heat your home will lose on the coldest day of the year and use that knowledge to determine the best boiler size.

 

Choose an Experienced Engineer

It’s best if you always go with an expert engineer who has a lot of experience with the type of work you’re doing. Look for a well-known company or a trader that has been in business for a few years; this will ensure that they know what they’re doing. Do not be afraid to request samples of their earlier work or to read feedback from previous customers.

We have put together a list of the best system boilers for 2021. You can easily buy one by following this article because we will cover all of the important features and choices of the best system boilers.

 

Top Combi Boilers Reviews

System boilers are commonly categorized based on their heat capacity. Here, we introduce models with 30 kW and 24 kW heat capacities due to their more usage in residential applications.

The best 24kW system boilers will easily provide enough central heating and domestic hot water for homes with about 10 radiators and 2 bathrooms. The following are the top 24kW machine boilers on our list:

• Baxi 824
• Ideal Logic Max
• Vaillant ecoTEC Plus 624
• ATAG i24S
• Worcester Bosch Greenstar 24i

The best 30kW system boilers are ideal for homes with 2-3 bathrooms and approximately 15 radiators. There are a variety of reliable system boilers to choose from when it comes to selecting the suitable model:

• Baxi 800 System Boiler
• Ideal Logic Max System Boiler
• Vaillant ecoTEC Plus 624 System Boiler
• ATAG i24S System Boiler
• Worcester Bosch Greenstar 24i System Boiler

 

1. Baxi 800 System Boiler

 

 

Specifications

• 18kW and 24kW models are available.
• Seasonal space heating efficiency of 93%
• Compact cupboards fit
• Lift weight is just 27.7kg, and it comes with a ten-year part and labor warranty.
• Megaflo cylinders are compatible.
• Rain compensation is compatible with IFOS systems.
• consists of Filter Adey Micro2 Magnetic System
• Hydraulics block in brass
• Frame with built-in standoffs
• The OpenTherm user interface
• Copper tails that have been pre-formed
• Flue lengths up to 20 meters are available.
• Simple bracket for hanging

 

General Descriptions

Baxi 800 machine boilers are made in the United Kingdom and feature high-quality brass components. Baxi boilers are well-known for their consistency as well as their high efficiency. The Baxi 800 collection of machine boilers also includes an 18kW model.

 

2. Ideal Logic Max System Boiler

 

 

Specifications

• Gas boiler type
• White color
• 10 years warranty
• 34 kg weight
• 24 kilowatts output
• “A” level ErP space heating efficiency
• 48 Decibels noise level
• Natural gas fuel
• Wall mounting

 

General Descriptions

The Logic Max range of system boilers from Ideal builds on the Logic Plus’s standards to provide a reliable, high-performing heating system with a long warranty. The Logic Max range has a variety of outputs, including 15kW, 18kW, and 30kW versions in addition to the 24kW model.

 

3. Vaillant ecoTEC Plus 624 System Boiler

 

 

Specifications

• Gas boiler type
• White color
• 5 years warranty
• 37 kg weight
• 24 Kilowatts output
• “A” rated ErP space heating efficiency
• 48 Decibels noise level
• Natural gas fuel
• Wall mounting

 

General Descriptions

The stainless-steel heat exchanger is a key feature of Vaillant ecoTEC boilers, which contributes to their performance. If a 24kW system boiler isn’t right for you, the Vaillant ecoTEC Plus range of system boilers also offers reduced outputs of 12, 15, and 18 kW, as well as higher outputs of 30 and 37 kW.

 

4. ATAG i24S System Boiler

 

 

Specifications

• Gas boiler type
• White color
• Up to 14 years warranty
• 39 kg weight
• 2 Kilowatts output
• “A” rated ErP space heating efficiency
• Natural gas fuel
• Wall mounting

 

General Descriptions

ATAG is well-known for providing 10-year warranties on all of their boilers, demonstrating their trust in their ability to perform. In addition to the warranty, when comparing the best 24kW system boilers, the reliability is among the highest, which will help you save money on your energy bills. The ATAG iS machine boilers come in a variety of output ratings, varying from 15 kW to 40 kW.

 

5. Worcester Bosch Greenstar 24i System Boiler

 

 

Specifications

• Gas boiler type
• White color
• Up to 7 years warranty
• 9 kg weight
• 6 Kilowatts output
• “A” rated ErP space heating efficiency
• Natural gas fuel
• Wall mounting

 

General Descriptions

Worcester Bosch has grown to be one of the most successful boiler manufacturers in the United Kingdom, and their Greenstar line is their most effective yet. The maximum output available in the Greenstar I range is 24kW, but lower outputs of 9kW, 12kW, 15kW, and 18kW are also available.

 

6. Worcester Bosch Greenstar 8000 Lifestyle

 

 

Specifications

• Gas boiler type
• White and Black color
• Up to 12 years warranty
• 47 kg weight
• 35 Kilowatts output
• “A” rated ErP space heating efficiency
• Natural gas fuel
• Wall mounting

 

General Descriptions

The Worcester Bosch Greenstar 8000 Lifestyle system boilers are divided into two categories: Life (30–50kW) and Style (30–50kW).

Style boilers are available in white and black, while Life boilers are only available in white. A variety of industry-leading features are shared by both the Life and Style boilers.

 

7. Ideal Logic Max

 

 

Specifications

• Gas boiler type
• White and Black color
• Up to 10 years warranty
• 4 kg weight
• 3 Kilowatts output
• “A” rated ErP space heating efficiency
• Natural gas fuel
• Wall mounting

 

General Descriptions

Ideal has earned a reputation as one of the most dependable boiler manufacturers in the UK, and as a result, they are extremely successful. For sites with lower heating and hot water demands, smaller outputs of 15 kW, 18 kW, and 24 kW are available.

 

8. Glow-worm Energy

 

 

Specifications

• Gas boiler type
• White and Black color
• 7 years warranty
• 32 kg weight
• 30 Kilowatts output
• “A” rated ErP space heating efficiency
• Natural gas fuel
• Wall mounting

 

General Descriptions

Glow-worm boilers are reasonably priced, but they don’t skimp on efficiency, as evidenced by the 7-year warranty. The 30kW model is the most robust in the Glow-worm Energy lineup, which also includes 12kW, 15kW, 18kW, and 25kW units.

 

9. Ariston Clas System One

 

 

Specifications

• Gas boiler type
• White and Black color
• 7 years warranty
• 1 kg weight
• 28 Kilowatts output
• “A” rated ErP space heating efficiency
• Natural gas fuel
• Wall mounting

 

General Descriptions

Ariston boilers feature a high-quality Italian design that includes an 8-year warranty as regular, as well as a host of useful features. The Ariston Clas System One range includes smaller outputs of 18 kW and 24 kW, in addition to this 30 kW model.

 

10. Vaillant ecoTEC Plus 630

 

 

 

Specifications

• Gas boiler type
• White and Black color
• 5 years warranty
• 38 kg weight
• 4 Kilowatts output
• “A” rated ErP space heating efficiency
• Natural gas fuel
• Wall mounting

 

General Descriptions

The Vaillant ecoTEC Plus 600 system boilers are extremely effective boilers installed in a unit with a sleek, stylish design. Vaillant ecoTEC Plus 600 boilers come in a variety of performance ratings to accommodate a variety of property types. The ecoTEC Plus 600 range includes 12 kW, 15 kW, 18 kW, 24 kW, and 37 kW models in addition to the 30 kW.

 

Benefits of System Boiler

If you want a more modern heating system than a traditional boiler (also known as a conventional or heat-only boiler), you have to choose between a system or a combi boiler. Although a combi boiler is a small, cost-effective option that does not include a water tank, system boilers are the best option for homes with multiple bathrooms. Some of the advantages of building a machine boiler are as follows:

• If you have a standard boiler, a system boiler is a more modern option that includes a pump that provides a faster response when you turn on the central heating.
• They will meet higher demands for domestic hot water because hot water is contained in a cylinder.
• Capable of delivering hot water to several bathrooms at once without a decrease in pressure
• If you have a solar thermal device (or are thinking of getting one), a solar-compatible cylinder will help you save bucks on your energy bills.

 

Conclusion

If you require a modern boiler and you have significant rooms and bathrooms in your home, you understand the importance of having the right system boiler. You won’t get too far without the right boiler, whether you need hot water or heat. These boilers are extremely useful for a variety of tasks, ranging from heating the required water for your bathrooms to providing enough heat for your home’s comfort. A good boiler will provide you with anything you need for a cozy apartment.

Choosing the right system boiler ensures that you will have a long-lasting and reliable boiler. It keeps your central heating system running at the perfect temperature, with hot water available whenever you need it.

We’ve put together a list of 13 of the best system boilers that are widely regarded as excellent choices for your home. You may choose the appropriate one based on your budget. We’ve also mentioned the benefits and drawbacks of each system boiler, as well as requirements and general descriptions. We’ve also gone through some of the most important factors to consider when choosing a system boiler from a variety of angles.