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1,492 reviews

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1,492 reviews

Alpha Boilers: Compare Efficiency, Warranty & Price

Innovation is embedded into the company culture at Alpha – which is why Alpha boilers get such great customer reviews. They manufacture combi, regular and system boilers, all of which run on natural gas. And the type of boiler best suited to your home will depend on the size of your property as well as your demand for heating and hot water.

In addition to choosing the right type of boiler, you will also need to consider the output, efficiency and warranty – all of which will give you an insight into the all round reliability of the boiler. There’s also the price which is important to consider with any investment.

  • Output rating: Measured in kilowatts (kW), the output rating lets you know how many radiators the unit is capable of heating. Simply put, the bigger the output the more suited it will be to meeting higher demands for central heating and domestic hot water.
  • Efficiency: A new boiler should help to lower your energy bills and the higher a boilers efficiency, the lower your bills could potentially drop. Efficiency is measured as a percentage and many Alpha boilers are 93% efficient, meaning that for every £1 spent heating your home, only 7p will be lost to the waste gases produced during operation.
  • Warranty: A warranty will see that you’re covered by the manufacturer should there be an issue with the boiler. Warranty length and terms will vary from manufacturer to manufacturer and the length of a warranty can reveal how reliable a particular boiler might be. Some Alpha boilers come with warranties of 5-10 years as standard which will see that you’re well covered.
  • Price: Alpha manufacture a cost-effective range of budget-friendly boilers. Comparing boilers with our Boiler Comparison Tool will help you to find the most suitable boiler for your budget.

Our Boiler Comparison Tool contains all of this information for every boiler manufactured by Alpha and by hitting the ‘add boiler’ symbol, you can compare the key information of up to 4 different boiler models with each other. You might find it useful to include your existing boiler as part of the comparison.

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Alpha combi boilers

An Alpha combi boiler is the perfect fit for smaller properties with 1-2 bathrooms. Combi boilers heat hot water on demand, using the mains water supply, and circulate it straight round to either the central heating system or hot water outlet. This removes any need for bulky tanks or cylinders elsewhere around the property.

As a guide, a 24-27 kW combi boiler would suit smaller homes with 1 bathroom and around 10 radiators, while outputs of 28-34 kW can heat slightly larger homes with up to 15 radiators.

Boiler Model kW Efficiency Warranty Typical Price


Alpha E-TEC 28kW Combi Gas Boiler 26.1 kw 93% 7 years £745 VIEW
Alpha E-TEC 33kW Combi Gas Boiler 29.7 kw 93% 7 years £815 VIEW
Alpha EVOKE 28kW Combi Gas Boiler 26.1 kw 93% 7 years £650 VIEW
Alpha EVOKE 33kW Combi Gas Boiler 29.7 kw 93% 7 years £690 VIEW
Alpha E-TEC PLUS 28kW Combi Gas Boiler 26.1 kw 93% 13 years £800 VIEW
Alpha E-TEC PLUS 33kW Combi Gas Boiler 29.7 kw 93% 13 years £925 VIEW
Alpha E-TEC PLUS 38kW Combi Gas Boiler 32 kw 93% 13 years £1,033 VIEW
Alpha CD28C Combi Gas Boiler 28kw 90.3% 5 years £781 VIEW
Alpha CD35C Combi Gas Boiler 35kw 90.5% 5 years £850 VIEW
Alpha CD28X Combi Gas Boiler 28kw 88.50% 2 years £690 VIEW
Alpha CD25X Combi Gas Boiler 25kw 88.60% 2 years £745 VIEW
Alpha CD25C Combi Gas Boiler 25kw 89.00% 5 years £850 VIEW
Alpha CD50 Combi Gas Boiler 50kw 89.30% 3 years £1,900 VIEW
Alpha InTec2 26CE Combi Gas Boiler 26kw 88.8% 7 years £713 VIEW
Alpha InTec2 30CE Combi Gas Boiler 30kw 88.8% 7 years £818 VIEW
Alpha InTec2 35CE Combi Gas Boiler 35kw 88.9% 7 years £883 VIEW
Alpha InTec 30C Combi Gas Boiler 30kw 88.2% 7 years £895 VIEW
Alpha InTec 34C Combi Gas Boiler 34kw 88.8% 7 years £975 VIEW
Alpha InTec2 25XE Combi Gas Boiler 25kw 88.8% 7 years £645 VIEW
Alpha InTec2 28XE Combi Gas Boiler 28kw 88.8% 4 years £675 VIEW
Alpha Eco2 Plus Combi Gas Boiler 28kw 88.8% 4 years £750 VIEW
Alpha InTec Gs 30kW Combi Gas Boiler 30kw 88.8% 5 years £1,900 VIEW
Alpha InTec Gs 40kW Combi Gas Boiler 40kw 88.8% 5 years £2,500 VIEW

Alpha regular boilers

Regular boilers are best suited to properties that already have the appropriate pipework in place. In addition to the boiler, the boiler needs to be part of a heating system that also includes a hot water cylinder as well as a cold water tank in the loft. A 15 kW Alpha regular boiler would suit homes with around 8-10 radiators, while the 25 kW model could handle up to 15 radiators.

Boiler Model kW Efficiency Warranty Typical Price


Alpha E-Tec 15R 15kW Regular Gas Boiler 15.1 kw 92% 7 years £710 VIEW
Alpha E-Tec 20R 20kW Regular Gas Boiler 20.4 kw 92% 7 years £715 VIEW
Alpha E-Tec 25R 25kW Regular Gas Boiler 26.1 kw 92% 2 years £810 VIEW
Alpha CD24R Regular Gas Boiler 24kw 88.6% 3 years £825 VIEW
Alpha CD13R Regular Gas Boiler 13kw 88.5% 3 years £675 VIEW
Alpha CD18R Regular Gas Boiler 18kw 88.4% 3 years £763 VIEW

Alpha system boilers

System boilers heat water to be stored in a hot water cylinder, allowing them to meet higher demands for domestic hot water. An Alpha system boiler with a 20 kW output rating would be able to heat around 12 radiators.

Boiler Model kW Efficiency Warranty Typical Price


Alpha ProTec Plus 50 System Gas Boiler 54kw 92% 5 years £983 VIEW
Alpha ProTec Plus 70 System Gas Boiler 74kw 92% 5 years £985 VIEW
Alpha ProTec Plus 90 System Gas Boiler 98kw 92% 5 years £1,144 VIEW
Alpha ProTec Plus 115 System Gas Boiler 121kw 92% 5 years £1,246 VIEW
Alpha E-TEC 20S System Gas Boiler 26.1 kw 93% 10 years £788 VIEW
Alpha E-TEC 30s System Gas Boiler 29.7 kw 93% 10 years £851 VIEW
Alpha E-TEC 35s System Gas Boiler 35.1 kw 93% 10 years £945 VIEW
Alpha CD28S System Gas Boiler 28kw 88.80% 3 years £840 VIEW
Alpha CD20S System Gas Boiler 20kw 88.8% 3 years £770 VIEW
Alpha CD12S System Gas Boiler 12kw 88.60% 3 years £760 VIEW
Alpha InTec2 20SE System Gas Boiler 20kw 88.9% 5 years £795 VIEW
Alpha InTec2 30SE System Gas Boiler 30kw 89% 5 years £827 VIEW
Alpha InTec 12S System Gas Boiler 13kw 88.80% 3 years £800 VIEW
Alpha InTec 18S System Gas Boiler 20kw 88.80% 3 years £900 VIEW
Alpha InTec 28S System Gas Boiler 30kw 89.00% 3 years £900 VIEW

If an Alpha boiler sounds like the right choice for your home, send us an enquiry today and we’ll find you up to 3 Gas Safe heating engineers in your area to provide free quotes for supply and installation.

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Benefits of an Alpha combi boiler

Alpha CD28X Combi Gas BoilerMost of us want to maximise our space at home, which is why so many people choose a combination or ‘combi’ boiler. Why? Because with this type of boiler, there’s no need to make room for a bulky water tank or a hot water cylinder. Plus, you have the added convenience of hot water on demand as soon as you turn on your tap without having to wait for a cylinder to reheat. And because you aren’t using energy to heat and store a whole cylinder of hot water, you could save money on heating bills too as you only heat as much water as you use.

A combi boiler provides both hot water and central heating from one compact unit which you can install in a wide range of locations in the home.

  • Lots of brands and product ranges to choose from so you can find the right fit for your needs
  • Enjoy the benefits of hot water on demand
  • Make the most of your loft and airing cupboard space
  • No worries about wasting water or energy – you only heat what’s needed

Benefits of an Alpha regular boiler

Alpha CD24R Range Regular Gas BoilerIf you are looking for a modern replacement for an older heating system, the chances are you’ll need to give some consideration to a regular boiler.

Also known as a conventional or traditional heating system, this type of boiler works with a hot water cylinder (usually in an airing cupboard) plus a cold water storage tank (which is usually in the loft). While many modern homes are choosing to swap their traditional Regular boiler for a System or Combi, some householders find that it makes more sense to stick with the Regular, especially if you have a large home with a high demand for hot water or you’re not planning to change the pipework already in place.

  • Comes in a range of sizes
  • Suitable for older properties with a traditional central heating system in place
  • Gives plenty of hot water for standard use

Alpha regular boilers are available in a range of outputs and sizes, so the prices therefore vary accordingly. When you’re setting a budget for investing in a new boiler, don’t forget to set aside some cash to pay for installation costs too.

The best way to save money on the cost of installation is to get in touch with more than one Gas Safe heating engineer so you can compare multiple quotes, identify the best deals and compare their professional advice. Get quotes for a new Alpha boiler.
Alpha ProTec Plus 115 System BoilerFor homes that expect to use lots of hot water, for example those with multiple bathrooms or shower rooms, a system boiler makes sense.

Benefits of an Alpha system boiler

The Alpha range of system boilers includes a range of outputs so you can match capacity with your expected requirements.

One of the key selling points of a system boiler is that the hot water storage cylinder is always topped up, so you can be sure of a hot shower or bath.

If others in your home want to use the bathroom after you, then the hot water that’s been used is automatically topped up. Most people position the hot water cylinder in an airing cupboard.

  • Suitable for various sizes of property
  • Hot water always available as the cistern automatically replenishes
  • Alpha offer plenty of choice to suit most heating and water requirements
  • Large capacity options available in the range

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Alpha boiler service

It’s important to keep your boiler in the best possible condition with an annual boiler service by a professional engineer. This will ensure the boiler can operate as efficiently as possible, keeping heating bills to a minimum, and that there are no potential safety issues to be concerned about. A boiler service is also a great way to catch and fix small repairs before they have the chance to worsen over time and cause an expensive breakdown. Find out what’s involved in an annual boiler service, why it’s so important, the benefits and how much they cost in Alpha Boiler Service.

Alpha boiler warranty

Every boiler manufacturer offers a standard warranty with their boilers which last between 1-10 years. The warranty is your insurance policy and means if a fault develops the manufacturer will resolve it within a specified time frame. Some warranties include both parts and labour while others may only cover parts. The most important thing to remember is to get your boiler serviced by a Gas Safe registered engineer every year as failing to do so is likely to invalidate your warranty. For more detail about this brand’s warranty (including the small print) take a look at Alpha Boiler Warranty.

Alpha boiler repair advice

Even the highest quality boiler can develop faults and problems as they age. Some are minor issues you may be able to handle yourself but most will need a Gas Safe registered engineer to diagnose and repair the problem. To find out if there are any common problems associated with this manufacturer you can read our guide to Alpha Boiler Repairs & Common Alpha Boiler Problems.

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Alpha renewable heating solutions

Alpha also offer a solar thermal system called SolarSmart. Solar collectors are fitted to your roof where they can capture the heat from the sun and use it to heat water in a cylinder. SolarSmart is designed to work alongside Alpha’s InTec combi boilers so that the boiler can act as a backup source of hot water when there is inadequate sunlight to meet demand. Solar thermal systems enabled you to buy less energy from a supplier reducing both your energy bills and CO2 emissions.

The SolarSmart 100 is the latest version of Alpha’s solar thermal system and includes the following:

  • Space saving 100 litre cylinder
  • Easy plug-in controls
  • Fully WRAS approved system
  • 10 year guarantee on collector and cylinder
  • Choice of ‘in-roof’, ‘on-roof’ and ‘flat roof’ fixing kits
  • Can be retrofitted to any Alpha high efficiency boiler with Solar Valve
  • Alpha boiler controls

    Alpha Climatic

    This is a multi-channel time and temperature programmer with integrated thermostat and BUS system to transfer information between the remote control and boiler. This control has designed to work with Alpha’s InTec range of boilers and is available in wired and wireless versions.

    Comfort 2-channel

    The Alpha Comfort 2-Channel is battery operated, radio frequency controller is a digital, wireless programmable room thermostat and timer for use with Alpha E-Tec system boilers.

    Digital EasyStat

    The easy to use Alpha Digital EasyStat enables wireless time and temperature control with 7 day programming and settings by hour.

    Mechanical EasyStat

    The Alpha 24-hour Mechanical EasyStat is a time and temperature controller.


    Visit the Alpha website for further details.

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