Alpha Boiler Reviews & Prices 2025

If you’re thinking about getting an Alpha boiler for your home but aren’t sure if it’s the right choice, this comprehensive review will provide you with all the information you need to make an informed decision.

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While Alpha is a relative newcomer to the heating and boiler replacement markets compared to some of the other big boiler brands, they still bring a solid 50 years of experience to the table.

As Italy’s market leader and with a significant presence in 30 other countries worldwide, Alpha knows a thing or two about heating—they’ve produced over 7 million boilers!

In this article, we’ll review some of their most popular models and boiler deals. We’ll also look at the cost of a new boiler and warranty options before diving into some of the most common Alpha boiler problems and how to fix them.

Alpha Boiler Types and Models

Whether you need a compact solution for a smaller home or a high-capacity system for a larger property, Alpha offers a variety of options to suit your needs.

Alpha Combi Boilers

Alpha offers a range of compact and efficient combi boilers that are great for smaller homes with 1-2 bathrooms. They feature stainless steel heat exchangers, which make them tough and long-lasting. 

The E-Tec range can provide between 12.4 and 14.1 litres of hot water per minute, depending on the model. They come with warranties ranging from 7 to 10 years, showing Alpha’s confidence in their products.

Boiler model	Outputs (kW)	Efficiency Rating	Warranty	Price (Boiler Only)	Price (Boiler + Installation)
E-TEC PLUS NX	28, 33, and 38	94%	10 years, possible to increase to 11 and 13 years	£900 – £1,100	£1,400 – £2,000
E-TEC NX	28 and 32	94%	7 years	£800 – £1,000	£1,300 – £1,800
EVOKE NX	28 and 33	94%	7 years	£700 – £900	£1,200 – £1,700

Alpha E-TEC PLUS NX

This highly efficient combi boiler boasts a 94% efficiency rating and comes with a generous 10-year warranty. The warranty can be increased to 11 years if the boiler is installed with a Cyclone Plus NX magnetic filter and up to 13 years if mounted with the PremierPack wall-mounting jig.

The boiler features a Grundfos pump with Delta T variable speed operation and hydroblock assembly, customizable range output, and adjustable heating flow temperature. It’s compatible with weather compensation and OpenTherm controls for enhanced efficiency.

The E-Tec Plus NX is available in 28kW, 33kW, and 38kW models, suitable for various home sizes. With its compact design and easy-to-use LCD display, it’s a reliable choice for homeowners seeking a modern and efficient heating solution.

Alpha E-TEC NX

The E-Tec NX is a feature-packed combi boiler known for its reliability and efficiency. It comes with a 7-year warranty and boasts a 94% efficiency rating. 

The boiler features a unique stainless steel heat exchanger moulded in thermoplastic, making it lightweight and durable. It also includes a Grundfos hydroblock assembly with a Delta T variable speed operation pump for optimal performance. 

The E-Tec NX offers adjustable heating flow temperature and is compatible with weather compensation. Available in 28kW and 32kW outputs, it’s suitable for small to medium-sized homes. Its compact size and user-friendly controls make it an attractive option for many homeowners.

Alpha EVOKE NX

If you’re short on space, the Evoke NX combi gas boiler could be a perfect solution. It doesn’t need hot water tanks or cylinders and is small enough to fit into a standard-sized kitchen cupboard, making it ideal for small—to medium-sized homes.

This boiler is highly efficient, with a 94% rating, and consumes little electricity. Featuring a stainless-steel heat exchanger, it also comes with frost protection to protect your boiler during colder months. It’s available in 28kW and 33kW outputs.

With a high-efficiency Grundfos pump and hydroblock assembly for reliable performance, the Evoke NX has easy-to-use controls with a backlit LCD display and push-button interface. With its balance of performance, efficiency, and value, the Evoke NX is a solid choice for homeowners seeking a dependable heating solution.

Alpha System Boilers

Alpha’s system boilers are designed for larger homes that need more hot water. The boilers in this range are highly efficient and also feature stainless steel heat exchangers. These boilers come in sizes from 20kW up to 68kW, allowing them to meet the needs of various household sizes. Like the combi boilers, they offer standard warranties between 7 and 10 years, providing peace of mind for homeowners.

Boiler model	Outputs (kW)	Efficiency Rating	Warranty	Price (Boiler Only)	Price (Boiler + Installation)
Alpha E-TEC NXS	26, 30, and 36	94%	7 years	£900 – £1,200	£1,400 – £2,000
Alpha PROTEC NX	48, 68, 90, 115, 150, and 180; can be cascaded to over 1MW	94%	10 years	£1,500 – £3,000+	£2,000 – £4,000+

Alpha E-TEC NXS 

The Alpha E-Tec NXS system boiler features an upgraded stainless steel heat exchanger molded in thermoplastic, making it lighter and more durable. It offers exceptional energy efficiency with a 94% rating. 

The boiler includes a Grundfos hydroblock assembly with a Delta T variable speed pump and adjustable heating flow temperature. It’s compatible with weather compensation and OpenTherm controls. 

The E-Tec NXS comes with a 7-year warranty and is available in three models: 26kW, 30kW, and 36kW outputs. Its compact design and easy installation features make it an attractive choice for medium-sized homes.

Alpha PROTEC NX 

The Alpha ProTec NX is a high-output system boiler designed for large domestic or commercial properties. It features a stainless steel heat exchanger and comes with up to a 10-year warranty. 

Available in six models—48kW, 68kW, 90kW, 115kW, 150kW, and 180kW, which can be cascaded to over 1MW—it offers impressive flexibility. The ProTec NX also has a wide 1:10 modulation range and ultra-low NOx emissions. 

It includes a fully modulated built-in circulator pump and is compatible with weather compensation. 

The boiler can be wall-mounted or fixed to freestanding frames and offers single-unit or modular formation options, making it versatile for various installation needs.

Alpha Conventional Boilers

Alpha E-Tec Regular

Boiler model	Outputs (kW)	Efficiency Rating	Warranty	Price (Boiler Only)	Price (Boiler + Installation)
Alpha E-Tec Regular	15, 20, and 25	92%-93%	7 years	£700 – £900	£1,200 – £1,800

Alpha’s conventional (also called regular or heat only) boiler range is represented by the E-Tec Regular. Because this is a regular wall-mounted boiler, it will be part of your home’s heating system.

With a 15kW output, the E-Tec Regular is ideal for smaller homes with a single bathroom. However, it’s also available in 20kW and 25kW models to accommodate higher consumption levels.

The E-Tec Regular boiler is highly efficient, with ratings between 92% and 93%. It features a stainless steel heat exchanger and comes with a 7-year warranty. 

This boiler is a good choice for those looking to replace an existing conventional boiler system, offering the same impressive attributes as Alpha’s combi and system boilers in terms of build quality and performance.

Alpha Boiler Prices

Alpha offers a range of boilers at different price points to suit various budgets:

Alpha Boiler Type	Price Range (Boiler Only)
Combi	£700 – £1,100
System	£900 – £3,000+
Regular	£700 – £900

Alpha Boiler Installation Costs

The total cost of installing an Alpha boiler includes both the price of the boiler and the installation, varying by boiler type and complexity:

Alpha Boiler Type	Price Range (Boiler + Installation)
Combi	£1,200 – £2,000
System	£1,400 – £4,000+
Regular	£1,200 – £1,800

Alpha Boilers Warranty Period

Alpha boilers come with warranties ranging from 7 to 13 years, depending on the specific model:

Alpha Boiler Model	Warranty
E-TEC PLUS NX	10 – 13 years
E-TEC NX	7 years
EVOKE NX	7 years
E-TEC NXS	7 years
PROTEC NX	10 years
E-TEC REGULAR	7 years

Common Problems With Alpha Boilers

Nobody expects problems with their new boiler, but it’s helpful to know that many common problems with an Alpha boiler can be quickly resolved by the homeowner. Flashing lights can be concerning, but these are the Alpha boiler error codes and their meanings:

Solid Red Indicator Light

This indicates that the boiler has failed to light and is usually accompanied by a 47-fault code on the display. To fix this, simply turn the switch on the front of the boiler to position 3. 

The reset sequence will then begin, and the boiler will attempt to restart after about 25-30 seconds.

Flashing Red Indicator Light

This usually occurs when the boiler has overheated. To reset, simply move the selector switch to position 3.

Flashing Red and Yellow Light

A flashing red and yellow light means there is either a blocked flue or a problem with the fan. In these cases, it is recommended that you call the Alpha Boiler helpline at 0344 871 8760.

Solid Yellow Indicator Light

A solid yellow indicator light may indicate a fault with the gas supply or flame detection system. This could be due to low gas pressure or a problem with the ignition. To resolve this, check if your gas supply is turned on and that there are no interruptions in the service. If the problem persists, consult a qualified Gas Safe engineer.

Flashing Green Light

A flashing green light typically suggests a drop in system pressure. Often, this is due to a leak or a recently bled radiator. You can resolve this by topping up the boiler pressure using the filling loop until the pressure gauge reads between 1 and 1.5 bar. 

If the pressure continues to drop, you should seek professional assistance to find and repair any leaks.

Alpha Boilers: Comparison and Customer Reviews

Let’s compare Alpha to two of its major competitors and look at what customers are saying.

Alpha vs Worcester

• Reputation: Worcester Bosch is one of the leading boiler manufacturers in the UK, while Alpha is gaining popularity as a reliable alternative.
• Efficiency: Both brands offer high-efficiency boilers, with Worcester Bosch’s Greenstar range and Alpha’s E-Tec series being particularly notable.
• Price: Alpha boilers are generally more competitively priced, offering good value for money compared to Worcester Bosch.
• Technology: Worcester Bosch is known for advanced features and smart controls, while Alpha focuses on reliable performance and user-friendly designs.

Alpha vs Viessmann

• Engineering: Viessmann is renowned for its German engineering, while Alpha has built a reputation for quality British manufacturing.
• Efficiency: Both brands offer highly efficient boilers, with Viessmann’s Vitodens range and Alpha’s E-Tec series being standout performers.
• Price: Alpha boilers are often more affordable than Viessmann, making them attractive to budget-conscious consumers.
• Innovation: Viessmann is known for cutting-edge technology, while Alpha focuses on reliable, straightforward designs.

Customer Reviews (from Trustpilot)

Alpha Heating Innovation has a strong presence on Trustpilot, with an overall rating of 4.7 out of 5 stars based on over 6,700 reviews. Here’s what the customers are saying in 2025:

A happy customer. The engineer has a great knowledge of the boiler and carried out the service very efficiently. – William D.

We had a leaking boiler and alpha came out to fix within 24 hours. We were contacted by Ade who was friendly, professional and efficient. Really happy with the service. Thank you! – Charlene

Repair was needed to my boiler as hot water wasn’t staying hot. Andy promptly found the fault and installed a new part. Excellent service as always. Andy is always friendly and helpful. Would highly recommend 5 ⭐️⭐️⭐️⭐️⭐️ – Kim W.

Great service would recommend Alpa. The gentleman was very nice he took all off the surroundings round the boiler and put it back the way it was. Very impressed, thank you – Jacqueline B.

Excellent and efficient service, as Always. I cannot recommend Alpha enough. We’ve been their customer for 20 years and cannot fault them. – Christopher W.

Final Verdict

After looking at the reviews, it’s clear that UK customers are overwhelmingly satisfied with their Alpha boiler replacements.

While Alpha boilers may not be as well-known as brands like Vaillant or Viessmann, they still stand out for their reliability and value. So, if you’re wondering, “Are Alpha boilers any good?” The answer is a resounding yes.

Additionally, with warranties of up to 12 years, Alpha demonstrates strong confidence in the quality and durability of their products.

Get a price on a new Alpha boiler here.