Which Is the Best Central Heating Boiler?

best central heating boilers

Actually, that’s a pretty tough question to answer, and that’s because what might be the right boiler for you probably isn’t going to meet the needs of a friend or neighbour. To find the best type of central heating boiler for you means taking into account your heating and hot water needs, whether you need hot water to be available from several outlets at the same time, how many people are in the home and also the type of central heating boiler already in place.

In this article, we aim to help you find the best central heating boiler for your needs and so we’ve narrowed down the choice to just ten. To do that we’ve focused on the systems which provide a great combination of reliability, efficiency and new replacement boiler cost. Don’t forget though, that this is all about what’s right for you and your family, so we strongly suggest that you get a personalised and fixed price recommendation from us here on all types of boilers.

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Top Combination Boilers

Alpha E-TEC Plus

With a stainless-steel heat exchanger which resists corrosion and a high-efficiency Grundfos pump and hydroblock assembly, it’s no surprise really that Alpha feel confident enough to offer a 10-year warranty as standard. This then increases to an incredible 13 years when the premier packed is added as an extra. A compact replacement boiler which will fit into a kitchen cupboard and it’s also highly efficient achieving a 93% rating meaning an ‘A’ ErP rating.

Vaillant eco-TEC Plus

Vaillant hand build this range of new boiler in their Derbyshire manufacturing plant. This combi boiler produces fast, hot water on demand with a flow rate of just under 16 litres per minute. And that hot water is delivered within 5 seconds. With many combi boilers being fitted in the kitchen, it’s good to know that this model has achieved Quiet Mark accreditation for the super low level of noise it makes while in operation.

Viessmann Vitodens 050-W

This compact, low-cost and low weight gas condensing boiler is an attractive option for many homes. The Viessmann Vitodens 050-W is just 7070mm in height, making it one of the smallest boilers in its class. This model comes with a high-quality stainless-steel heat exchanger, and it achieves an efficiency rating of 97 per cent. The 050-W comes with an electronic boiler control unit which includes a weather compensated mode.

Worcester Bosch Greenstar 8000 Life Combi

One of the most powerful combination boilers, the Greenstar 8000 Life features a range of functionality, making it one of the easiest boilers to get the perfect balance of hot water and heating. The 8000 Life can connect your Wi-Fi to the Bosch EasyControl system for smart and personalised control of the boiler. This is an excellent choice for larger homes that have more than one bathroom and possibly the best combi boiler on the market.

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Top System Boilers

Vaillant ecoTEC Plus S

This super quiet and highly efficient boiler has the ability to use just 16% of its maximum power when your heating needs lower, resulting in great savings in energy use and on your fuel bills.  Vaillant has made the ecoTEC simple to use with a range of heating control options, including a simple boiler timer and their vSMART™ smartphone app.

Viessmann Vitodens 100-W System Boiler

With a corrosion-resistant stainless steel Inox-Radial, heat exchanger efficiency levels of up to 97% are finally a reality. Viessmann is well known for their boilers’ exceptionally quiet operation, and the 100-W is no exception achieving an operating noise of just 39dB. The 100-W comes with weather compensation, meaning that it detects outside temperature changes and automatically changes the boiler’s flow temperature.

Alpha E-Tec System Boiler

Part of the popular E-Tec range, this system boiler from Alpha could be a good choice for medium-sized homes that don’t have heavy demands on the supply of heating and hot water. A highly efficient boiler achieving a 93% efficiency rating and an ‘A’ ErP rating. The E-TEC is a compact system and being wall mountable it’s great for when space is at a premium.

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Top Regular Boilers

Vaillant ecoFIT Pure Regular

If you need a regular boiler but space is tight in your home, then the cupboard-size ecoFIT pure regular boiler needs to be on your shortlist. It also has the added advantage of being really flexible on where it’s sited with its option for a rear flue. This model has an aluminium heat exchanger which provides fantastic performance and low energy consumption. This boiler will reduce itself to 20% of its maximum output when it senses the need for a reduced heat requirement.

Worcester Greenstar Ri

The Greenstar Ri boiler from Worcester Bosch is a compact, wall-mounted boiler making it a good option for small and medium-sized homes. Operated by a simple control knob, it features a frost protection system reducing the risk of problems when fitted in a garage or loft. This boiler can also be used with solar panels for increased energy and cost savings.

Glow-worm Ultimate₃ Regular Boiler

If you have high hot water demands, then the Ultimate₃ could be the perfect choice. A compact and lightweight boiler it easily fits into a kitchen cupboard. Compatible with Glow-worm’s popular app-based control MiGo you gain control of your heating and hot water no matter where you by simply accessing the app on your smartphone or tablet

ModelTypeWarrantyPower OutputStarting Price
Alpha E-Tec PlusCombi10 years28, 33 or 38kW£600
Vaillant eco-TEC PlusCombi5 years25, 32, 35 or 38kW£950
Viessmann Vitodens 050-WCombi3 years29 and 35kW£810
Worcester Bosch Greenstar 8000 LifeCombi5 years30, 35, 40, 45 or 50kW£1,200
Vaillant ecoTEC Plus SSystem5 years12, 15, 18, 24, 30 or 37kW£950
Viessmann Vitodens 100-WSystem5 years19, 26, 30, 35kW£1,145
Alpha E-Tec Plus SSystem7 years20, 30 or 35kW£780
Worcester Bosch Greenstar RiRegular5 years12, 15, 18, 21, or 24kW£1,080
Vaillant ecoFIT PureRegular2 years12, 15, 18, 25, 30 or 35kW £970
GlowWorm Ultimate₃Regular5 years25kW£850

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What Size Central Heating Boiler Do I Need?

One of the key deciding factors for the size of boiler needed is the number of radiators.

A small flat will only need a small boiler to provide the best economy.

A three to four-bedroom home usually has around ten radiators, and so a 24-30 kW boiler is generally recommended.  

A larger house with more radiators or additional bathroom will typically need a boiler in the range of 30-35 kW.

Which Type of Central Heating Boiler Is Right for Me?

If we were to pick just two boilers, then we’d go for the  Worcester Bosch Greenstar 8000 Style Combi Boiler and then the Viessmann Vitodens 050-W. These combi boilers aren’t cheap boilers, but provide exceptional value for money, excellent reliability, and high energy efficiency levels.

Once you have your boiler in place, make sure you have the best boiler and central heating cover to give you complete peace of mind. We’ve provided a complete guide to help you make the right choice for your boiler system.



It can be tough to go through all the websites to work out the best central heating boilers UK suppliers can provide to fit your needs and requirements. Here at Boiler Central, we have made life so much easier for you to get an instant no-obligation, fixed price quote including boiler installation. Simply answer a few questions about your heating needs, and we’ll provide some great suggestions for you.

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