Facebook pixel
new boiler

Get a new boiler

Fixed price boilers, next day

See boiler prices
new air conditioning

Air Conditioning

Get a quote
new heat pump

Heat Pumps

Coming soon

new ev charger

EV Chargers

Get a quote
boiler servicing

Boiler Servicing

Get a quote

Last updated: 31st July, 2023


Alpha E-Tec NX Boiler Review (2023 Model)

Alpha E-Tec NX Boiler Review (2023 Model)

Key takeaways

  • The new Alpha E-Tec NX has premium components that will not let you down, including a robust stainless steel heat exchanger.
  • The boiler is compatible with weather compensation, which allows it to adjust the heating system's output based on external temperature conditions.
  • The Alpha E-Tec NX features a combined expansion relief valve and condensate drain, boosting sleekness.

As a leading online boiler installation company, iHeat is committed to providing customers with the latest advancements in heating technology.

Let's explore the Alpha E-Tec NX boiler, a cutting-edge combination boiler designed to deliver exceptional performance, energy efficiency, and innovative features. 

Need a new boiler?

Get a quote in 60 seconds, fitted as fast as next day!
0% APR finance available.

Get a quote

Join us as we delve into the key attributes of this boiler, its benefits for homeowners, and how it stands out in the competitive market. Discover why the Alpha E-Tec NX is a top choice for reliable and efficient heating solutions.

Technical specification




Flow Rate 



Boiler Dimensions ( H/W/D)

712 x 440 x 255

712 x 440 x 255

Key Features

The Alpha E-Tec NX is a feature-packed new combination boiler renowned for its reliability, efficiency, and advanced technology. It offers homeowners a wide range of benefits, making it a popular choice in the market:

Stainless Steel Heat Exchanger Moulded in Thermoplastic

The Alpha E-Tec NX incorporates a unique feature—a stainless steel heat exchanger moulded in thermoplastic material. 

This combination offers several advantages. The stainless steel heat exchanger provides excellent heat transfer capabilities, ensuring efficient and reliable performance. 

Additionally, the thermoplastic mould reduces the weight of the boiler, making it easier to handle and install. This innovative design enhances the boiler's efficiency and improves its overall durability.

Grundfos Hydroblock Assembly with Delta T Variable Speed Operation Pump

The boiler has a Grundfos hydro block assembly featuring a Delta T variable speed operation pump. 

This advanced assembly optimises the heating system's performance by adjusting the pump speed based on the temperature differential (Delta T) between the flow and return pipes. 

This intelligent control enables precise balancing of the system and ensures efficient operation, reducing energy consumption and promoting cost savings.


Adjustable Heating Flow Temperature

The Alpha E-Tec NX offers adjustable heating flow temperature, allowing homeowners to customise the system according to their specific requirements. 

By fine-tuning the flow temperature, the boiler can operate efficiently for optimal performance. 

This flexibility maximises energy efficiency and provides enhanced comfort control, adapting to varying weather conditions and heating demands.


Range Output Customizable to System Requirements

The boiler's range output is customizable, meaning it can be tailored to meet the specific heating demands of the system. 

This adaptability ensures that the boiler delivers the required heat output for optimal comfort and efficiency. Whether a small apartment or a larger family home, the Alpha E-Tec NX can be configured to match the heating needs, providing precise and efficient heating performance.

Combined Expansion Relief with Condensate Drain

The Alpha E-Tec NX features a combined expansion relief valve and condensate drain. This integrated design streamlines the installation process and reduces the components needed. 

It efficiently removes excess water and condensates while providing a safety mechanism for managing system pressure.

This convenient feature saves time during installation and maintenance, ensuring reliable and trouble-free operation.

Weather Compensation Compatibility

The boiler is compatible with weather compensation, which allows it to adjust the heating system's output based on external temperature conditions. 

By integrating a simple external sensor connection, the Alpha E-Tec NX can respond intelligently to changes in outdoor temperature, optimising heating efficiency and maintaining consistent indoor comfort. 

This feature ensures that the boiler operates most efficiently, saving energy and reducing fuel consumption.

Open Therm and Alpha BUS Control Compatibility

The Alpha E-Tec NX is compatible with Open Therm and Alpha BUS control systems. Open Therm compatibility enables the boiler to communicate with external thermostats, allowing for precise temperature control and optimization. 

Alpha BUS compatibility ensures seamless integration with other Alpha heating products, providing enhanced control options and system coordination. These compatibility features offer homeowners greater flexibility and control over their heating system.

Removable Push Fit Flue Connection

The boiler's removable push-fit flue connection simplifies the installation process, particularly for vertical or horizontal flue configurations. 

This quick and easy connection method saves time and effort during installation, ensuring a secure and reliable flue system. The convenience of the removable push-fit flue connection enhances installation efficiency and minimises potential errors, guaranteeing a safe and compliant setup.

Incorporating these advanced features and innovative design elements, the Alpha E-Tec NX boiler offers homeowners an efficient, versatile, and user-friendly heating solution. 


Its stainless steel heat exchanger, customisable settings, intelligent controls, and convenient installation features make it an excellent choice for optimising energy efficiency and achieving reliable performance in any home.

At iHeat we aim to make the quote process and subsequent installation of your new Alpha boiler as easy as possible; that’s why all of our quotes are free, fixed price, and take no more than 60 seconds!

Get a quote

Frequently Asked Questions

What is the efficiency of the Alpha E-Tec NX (2023 model)?

The Alpha E-Tec NX boiler is highly efficient, featuring a high-efficiency Grundfos pump and a stainless-steel heat exchanger. This ensures the boiler operates at excellent energy efficiency levels.

How do plumbers rate the 2023 Alpha E-Tec NX boiler?

Although specific reviews of the 2023 Alpha E-Tec NX model were not found, Alpha boilers are known to be reasonably priced and reliable with plumbers rating them positively for their performance and quality.

What are the key features of the Alpha E-Tec NX 28kW combi boiler?

The Alpha E-Tec NX 28kW combi boiler is compact and offers knockout performance. Key features include:

  • High-efficiency Grundfos pump
  • Stainless steel heat exchanger
  • Suitable for medium-sized homes

How do the Alpha E-Tec NX 33 Plus and 38 models compare?

While specific comparisons of the E-Tec NX 33 Plus and 38 models were not found, boilers in the Alpha E-Tec range offer various power outputs to cater to different hot water demands. The higher the kW, the more capable it is in meeting higher hot water needs for larger households.

What is the warranty period for the 2023 Alpha E-Tec NX boiler?

The warranty period for Alpha boilers may vary depending on the specific model and installation. It is recommended to check with the manufacturer or installer for accurate warranty information related to the 2023 Alpha E-Tec NX boiler.

Are there any common issues with the Alpha E-Tec NX plus 33 low pressure?

Information on common issues related to low pressure in the Alpha E-Tec NX plus 33 was not found in the available sources. However, low pressure could be an issue with any boiler due to factors such as leaks or faulty pressure release valves.

Who makes Alpha boilers?

Alpha boilers are manufactured by Alpha Heating Innovation, a leading UK boiler brand known for their high-quality products and commitment to innovation in heating technology.

How long does an alpha combi boiler last?

On average, Alpha combi boilers are expected to last around 10-15 years. However, their lifespan can be influenced by factors such as regular maintenance, usage, and the overall quality of the installation.

Stephen Day profile photo
Article by
Stephen Day | Co-founder
Gas Safe registered and FGAS certified engineer with over 20 years experience in the heating and cooling industry.