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Updated: September 11, 2024

 
When selecting a high-quality heating solution in London, Grant boilers stand out for their exceptional efficiency, durability, and advanced technology. As one of the leading brands in the oil-fired boiler market, Grant offers a range of models designed to meet various heating needs while ensuring optimal performance.
 
Whether you are looking for a compact combi boiler for a smaller home or a robust system boiler for a larger property, Grant provides solutions that cater to different requirements. In this guide, we explore some of the best Grant boilers available in London, highlighting their key features, benefits, and how they can provide reliable, efficient heating for your home.

 
Grant boilers reviews


Grant boilers are particularly well-suited for homes that are not connected to the gas grid and rely on oil for heating. They are known for their longevity, with many users reporting trouble-free operation for many years. The company’s commitment to innovation, particularly in terms of efficiency and environmental impact, makes them a leading choice for oil boilers in the UK.


Grant Vortex Pro Combi
This model offers excellent efficiency, compact design, and a built-in stainless steel heat exchanger. It also includes a factory-fitted low NOx burner, making it environmentally friendly. The combi version is particularly popular for its ability to provide both heating and hot water on demand.
 
Type: Oil-fired combi boiler.
Efficiency: Up to 94.5% efficiency (ErP A-rated).
 
Grant Vortex Blue
The Vortex Blue range uses a blue flame burner, which results in cleaner combustion and lower emissions. It’s ideal for homes where environmental concerns are a priority. The range also boasts a range of outputs to suit different home sizes.
 
Type: Oil-fired boiler (available in combi, system, and regular versions).
Efficiency: Up to 94% efficiency (ErP A-rated).
 
Grant Vortex Eco
A more budget-friendly option in the Grant range, the Vortex Eco is still highly efficient but is designed for those who need reliable performance without all the premium features. It’s available in several output sizes and is known for its simple and robust design.
 
Type: Oil-fired regular boiler.
Efficiency: Up to 90% efficiency (ErP A-rated).


Grant boilers features


Grant boilers are a popular choice for those looking for reliable, efficient, and environmentally responsible heating solutions, particularly in areas where oil heating is predominant.
 
High Efficiency
Many Grant boilers are A-rated for energy efficiency, with some models achieving efficiency ratings of up to 94.5%. Grant boilers use condensing technology to extract more heat from the combustion process, reducing fuel consumption and lowering energy bills.
 
Innovative Burners
These burners reduce nitrogen oxide emissions, making the boilers more environmentally friendly and compliant with modern regulations. Blue Flame Technology, which is found in the Vortex Blue range, ensures cleaner combustion and further reduces emissions.
 
Heat Exchangers
The use of a Stainless Steel Heat Exchanger provides excellent heat transfer and corrosion resistance, extending the life of the boiler. It is also designed to maximise heat recovery from flue gases, further improving efficiency.
 
Flexible Installation
Many models, particularly the combi boilers, are designed to be compact, allowing for easy installation in smaller spaces.
 
User-Friendly Controls
Options for digital controls with easy-to-use interfaces or manual controls for more straightforward operation. Programmable Timers and Thermostats allow users to set heating schedules and maintain optimal comfort levels.
 
Environmental Considerations
Eco-Friendly Operation can help reduce carbon footprints through efficient combustion and low emissions. Some models are compatible with biofuels, offering an alternative to traditional heating oils.
 
Durability and Reliability
Grant boilers are built with high-quality materials that ensure long-lasting performance, even in demanding conditions. Many models come with a comprehensive warranty, reflecting the brand’s confidence in their product’s durability.
 
Quiet Operation
Some models are designed with noise-reducing features, ensuring quiet operation, which is particularly beneficial in residential settings.
 
Simple Maintenance
Designed with accessibility in mind, making maintenance and servicing straightforward for engineers. Some boilers include self-cleaning mechanisms that reduce the need for frequent maintenance.

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Grant boilers warranty


Grant boilers typically come with a comprehensive warranty, reflecting the brand’s confidence in the durability and reliability of their products. The warranty coverage can vary depending on the specific model and the type of installation.
 
Standard Warranty
Length: Most Grant boilers come with a standard warranty period of 2 to 5 years. The exact duration depends on the model and whether the installation meets specific criteria set by Grant.


Extended Warranty
Length: Some models offer an extended warranty of up to 10 years. This extended warranty often requires that the boiler is installed by a Grant G1 installer (an accredited installer recognized by Grant) and that the boiler is registered within a certain time frame after installation.


Terms and Conditions of Grant Boilers Warranty


Annual Servicing: To maintain the warranty, the boiler typically needs to be serviced annually by a qualified engineer. Failure to do so might void the warranty.
Installation Requirements: The warranty may depend on the boiler being installed according to Grant’s guidelines, which might include the use of specific ancillary products like Grant’s magnetic filters or a low-level flue kit.
Registration: The boiler must be registered with Grant after installation to activate the warranty, typically within 30 days.


Warranty Coverage of Grant Boilers
Parts and Labor: The warranty usually covers both parts and labour, ensuring that any repairs or replacements needed during the warranty period are taken care of without cost to the homeowner.
Heat Exchanger: The heat exchanger, a critical component of the boiler, often has a longer warranty than other parts, sometimes up to 10 years, depending on the model.


Warranty Exclusions of Grant Boilers
Wear and Tear: Standard exclusions might include wear and tear items, damage caused by improper installation, or failure to follow maintenance guidelines.
Third-Party Components: The warranty might not cover components added by third parties that are not approved by Grant.


Grant boiler service


Servicing a Grant boiler is essential to maintaining its efficiency, safety, and warranty coverage. Regular service ensures that the boiler operates at its best and helps to identify any potential issues before they become major problems.
 
Annual Servicing Requirement
Frequency: Grant recommends that their boilers be serviced annually. This is a standard requirement to keep the boiler in good working order and to maintain the warranty.
Qualified Engineer: The service must be carried out by a qualified heating engineer, preferably one with experience in servicing oil-fired boilers.


Benefits of Regular Servicing
Efficiency: Regular servicing ensures that the boiler operates efficiently, reducing fuel consumption and lowering energy bills.
Reliability: Prevents unexpected breakdowns by identifying and addressing potential problems early.
Safety: Ensures that the boiler operates safely, particularly important for oil-fired systems.
Warranty Maintenance: Keeps the warranty valid, which is essential for covering any potential repairs under the warranty terms.

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Boiler Installation


How much does it cost to service a Grant Boiler?


The cost of servicing a Grant boiler can vary depending on the location and the engineer, but it typically ranges between £100 and £200. If any parts need to be replaced during the service, this may incur additional costs.


What’s Included in a Service


Visual Inspection
The engineer will begin with a visual inspection of the boiler and associated pipework, checking for any obvious signs of wear, damage, or leaks.


Flue and Ventilation Check
Ensures that the flue and ventilation systems are clear and functioning correctly. This is crucial for safe operation, especially in oil boilers.


Cleaning the Boiler
The internal components of the boiler, including the burner, heat exchanger, and combustion chamber, will be cleaned to remove any soot, debris, or buildup that could affect performance.


Burner Check
The burner, a critical component in an oil-fired boiler, will be checked and adjusted if necessary. The engineer may also clean or replace the nozzle and ensure that the burner is operating efficiently.


Heat Exchanger
The heat exchanger will be inspected and cleaned to ensure optimal heat transfer and efficiency.


Oil Filter and Lines
The oil filter and lines will be checked and cleaned or replaced if needed to ensure the smooth flow of fuel to the burner.


Safety Controls
All safety controls, including the thermostat, pressure relief valve, and other safety mechanisms, will be tested to ensure they are functioning correctly.


Combustion Analysis
The engineer will conduct a combustion analysis to check the efficiency of the boiler and make any necessary adjustments to optimise performance.


Condensate System
In condensing boilers, the condensate trap and pipework will be checked and cleaned to ensure there are no blockages.


Seal and Gasket Check
All seals and gaskets will be inspected for wear and tear and replaced if necessary to prevent leaks.
 
Grant boilers technical
 
Grant boilers are known for their advanced technical specifications and innovative features that enhance their performance, efficiency, and reliability.
 
Efficiency Ratings
Grant boilers typically achieve ErP (Energy-related Products) ratings of A, with efficiencies ranging from 90% to over 94.5%. This high efficiency is due to the condensing technology and optimised burner design.
 
The seasonal efficiency of Grant boilers is consistently high, ensuring that they perform efficiently throughout the year.
 
Burner Technology
Grant boilers are equipped with low NOx burners, which reduce nitrogen oxide emissions. This makes them compliant with modern environmental regulations. The Vortex Blue range features blue flame technology, which ensures cleaner combustion, lower emissions, and higher efficiency.
 
Heat Exchanger Design
Grant boilers use stainless steel heat exchangers, which are resistant to corrosion and have excellent thermal conductivity. This design ensures long-lasting performance and efficient heat transfer.
 
The unique Vortex design maximises heat recovery from flue gases, further enhancing efficiency. This design helps Grant boilers achieve their high efficiency ratings.
 
Controls and Interface
Grant boilers come with both digital and manual control options, allowing users to choose the level of automation they prefer. Digital controls often include easy-to-use interfaces with options for programming heating schedules.
 
Some Grant boilers are compatible with smart controls, enabling remote management of heating systems via smartphone apps.
 
Flue Options
Grant offers a range of flue options to suit different installation requirements, including high-level, low-level, and balanced flues. This flexibility allows for installation in various locations and configurations.
 
Fuel Options
While traditionally designed for use with kerosene, some Grant boilers are also compatible with biofuels, offering a more sustainable heating option.
 
Noise Levels
Grant boilers are designed for quiet operation, with noise levels kept to a minimum. This is particularly important for residential installations.
 
Safety Features
Grant boilers are equipped with overheat protection to prevent the boiler from reaching unsafe temperatures. They also Include a pressure relief valve to protect the boiler and heating system from excessive pressure buildup.
 
Output Range
Grant boilers are available in a wide range of outputs, from as low as 12 kW to over 70 kW, catering to different heating requirements from small homes to larger properties.
 
Environmental Compliance
Grant boilers are designed to meet and exceed environmental standards for emissions, including NOx and particulate matter, making them a good choice for environmentally conscious consumers.
 
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How long do Grant boilers last?


Grant boilers are known for their durability and long lifespan. With proper installation and regular maintenance, a Grant boiler can last between 15 to 20 years or even longer.


Grant boiler installation in london


Let’s Heat offers professional installation services for Grant boilers in London. As a trusted heating company, we provide expert installation tailored to the specific needs of your home, ensuring optimal performance and efficiency. We are known for our quality craftsmanship and customer service, Let’s Heat is a reliable choice for installing Grant boilers, especially in areas where oil heating is predominant. We also ensure that the installation meets all relevant standards and that the boiler is set up to provide long-lasting, efficient heating.


Grant boiler installation Cost in london


The cost of installing a Grant boiler in London can vary depending on several factors, including the type of boiler, the complexity of the installation, and any additional work required.
 
Installation Cost
Standard Installation: £1,500 to £2,500 (depending on the complexity)
Additional Work: Extra costs may apply if additional work is required, such as upgrading the heating system, installing new flue systems, or removing the old boiler.


Grant boiler price list uk london


Grant Boiler Price List (London, UK)
Grant Vortex Pro Combi
24kW: £2,000 to £2,400
26kW: £2,200 to £2,600
36kW: £2,500 to £3,000
Grant Vortex Blue Combi
21kW: £2,100 to £2,500
26kW: £2,300 to £2,700
36kW: £2,600 to £3,100
Grant Vortex Eco
15/21kW Regular: £1,600 to £2,000
21/26kW Regular: £1,800 to £2,200
15/21kW System: £1,700 to £2,100
Grant Vortex Pro System
15/21kW: £1,800 to £2,200
26/36kW: £2,200 to £2,600
Grant Vortex Blue System
21kW: £2,000 to £2,500
26kW: £2,200 to £2,700


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Grant oil boilers vs gas


When choosing between Grant oil boilers and gas boilers, it’s important to consider several factors, including fuel availability, efficiency, installation costs, and environmental impact.
 
1. Fuel Availability
Oil Boilers: Ideal for homes that are off the gas grid, common in rural areas. Oil is delivered and stored in a tank on the property.
Gas Boilers: Best suited for homes connected to the gas grid. Gas is supplied directly, so there’s no need for on-site storage.


2. Efficiency
Grant Oil Boilers: Highly efficient, with many models achieving ErP A-ratings and efficiencies up to 94.5%. Condensing oil boilers recover more heat from flue gases, reducing fuel consumption.
Gas Boilers: Also very efficient, with modern condensing gas boilers achieving similar efficiency ratings. Gas is typically cheaper than oil, which can make running costs lower.


3. Installation Costs
Oil Boilers: Generally more expensive to install due to the need for an oil storage tank and potentially more complex flue systems.
Gas Boilers: Installation is typically cheaper and more straightforward, especially if the property is already connected to the gas grid.


4. Running Costs
Oil Boilers: Running costs can be higher due to the fluctuating price of oil. However, bulk purchasing of oil when prices are lower can mitigate this.
Gas Boilers: Generally have lower running costs, as natural gas tends to be cheaper and prices more stable compared to oil.


5. Environmental Impact
Oil Boilers: Emit more CO2 compared to gas boilers, though Grant’s models with low NOx burners and blue flame technology help reduce harmful emissions.
Gas Boilers: Considered cleaner than oil, with lower carbon emissions. Natural gas is still a fossil fuel, but it burns more cleanly than oil.


6. Maintenance
Oil Boilers: Typically require more maintenance, including regular checks of the oil tank, burner, and flue system. Annual servicing is crucial to ensure efficiency.
Gas Boilers: Easier to maintain with fewer components requiring regular attention. Annual servicing is still recommended.


7. Long-Term Considerations
Oil Boilers: May be more suitable if you are in a rural area or where gas is not available. With rising concerns over fossil fuels, oil may face stricter regulations in the future.
Gas Boilers: With the push towards cleaner energy, gas is likely to remain a more widely accepted heating source in the medium term, though the shift towards renewable energy could impact this.


Conclusion:


Choose a Grant Oil Boiler if you live in a rural area without access to natural gas and require a reliable, efficient heating solution. Oil boilers are a solid choice for off-grid properties.
Choose a Gas Boiler if you have access to the gas grid and are looking for a more cost-effective and environmentally friendly option. Gas boilers generally have lower installation and running costs, with less maintenance required.

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FAQs

Why should I choose Grant boilers for my home in London?

Grant boilers are renowned for their reliability, efficiency, and durability, making them a top choice for heating systems in London homes.

Where can I purchase Grant boilers in London?

Grant boilers are available from authorized dealers, plumbing and heating suppliers, and online retailers throughout London.

Are Grant boilers energy-efficient?

Yes, Grant boilers are designed with high energy efficiency in mind, helping you reduce your heating costs while maintaining a comfortable home.

Can I get professional installation for a Grant boiler in London?

Absolutely, there are many certified heating engineers and companies in London that specialize in the installation of Grant boilers, ensuring a safe and efficient setup.