Has your boiler broken down or become expensive to repair, and you’re wondering about BOXT boiler replacement costs and how they compare to those of other installers?

When a heating system starts to fail, it isn’t just the inconvenience that prompts you toward a decision. According to the Energy Saving Trust, heating and hot water make up over 50% of the average household’s energy bill. If your boiler is old, unreliable, or operating below modern efficiency standards, you’re paying more each month than you should.

Those rising gas costs usually creep in slowly. Hot water takes longer to heat. Radiators struggle to reach the desired temperature. Winter bills jump even when your usage hasn’t changed. A modern A-rated boiler shifts that dynamic. It uses less fuel to deliver better heat, keeps your home comfortable without wasting gas, and brings your energy spend back under control.

This is where clear pricing and a straightforward installation process become essential. When you can see exactly what the replacement will cost and how much you stand to save, the decision stops feeling overwhelming and starts feeling like a smart, timely upgrade for your home.

Quick Takeaways on BOXT Boiler Replacement:

• BOXT offers fixed-price boiler replacements, with straightforward combi-to-combi swaps typically starting from £1,790, including installation, flue, disposal and a system clean.
• Upgrading an older boiler can noticeably reduce monthly gas costs.
• BOXT partners with top companies like Worcester Bosch and Valliant, ensuring access to top boilers and long warranties of up to 10 years.
• The online survey and instant pricing remove the need for in-home sales visits and help avoid surprise extras.
• Installation is fast, with next-day availability in many areas through BOXT’s nationwide network of Gas Safe engineers.
• Best value is seen in standard replacements, while complex homes may still benefit from comparing quotes with local installers.

When Should You Replace Your Boiler?

Replacing a boiler is rarely anyone’s first choice. Most people try repairs, hope the system can last another winter, or assume higher bills are just part of getting older equipment. The decision becomes far clearer once you understand the typical signs that a boiler is no longer performing efficiently or cost-effectively.

Age and Falling Efficiency

Boilers naturally lose efficiency as they age. Once a system reaches twelve to fifteen years old, its internal components begin to wear, the heat exchanger struggles to transfer heat effectively, and fuel consumption increases even if usage remains the same. Older boilers often take longer to heat water, cycle more frequently, or leave certain rooms cooler than others.

Rising Repair Costs

A boiler that breaks down once may just need a part replaced. A boiler that breaks down repeatedly is usually signalling the end of its lifespan. As a guideline, when annual repair bills start to exceed 10-15% of the replacement cost, upgrading becomes the more cost-effective long-term choice.

Inconsistent Heating and Hot Water

If radiators take a long time to warm up, hot water runs hot then lukewarm, or the boiler struggles during peak times, these symptoms usually indicate reduced performance. This happens even more quickly in busy households, where the demand for hot water puts older systems under regular strain.

Higher Bills Without Higher Usage

When gas bills rise despite no change in your habits, it typically indicates a decline in boiler efficiency. A modern A-rated boiler reduces fuel waste and stabilises monthly costs, which becomes especially noticeable in winter.

Boiler Age, Efficiency and Replacement Urgency

Boiler Age	Typical Efficiency	Annual Energy Waste	Replacement Urgency
Under 5 years	90%+	Minimal	Low
10–15 years	75–85%	£100–£200	Moderate
15+ years	Below 70%	£250+	High

When these signs start appearing together, replacement becomes the option that protects comfort in your home and reduces long-term costs.

How the BOXT Boiler Replacement Service Works

Once you decide to replace your boiler, the next challenge is finding an installer who can provide a clear price, complete the work efficiently, and deliver a reliable, long-lasting system. BOXT has built its reputation around making this process simpler through a fully online journey and fixed pricing, so you know exactly what you’re paying before any engineer arrives at your home.

Step 1: Complete the Online Survey

Everything begins with BOXT’s online assessment. You answer a few questions about your home, your existing boiler, and your hot water usage. You’ll be asked to upload photos of the current setup so the engineering team can check flue position, pipework, and access. This replaces the traditional in-person sales visit, keeping the process fast and consistent.

Step 2: Receive an Instant Fixed Price

Once the survey is complete, you’re shown a fixed price that already includes the boiler, standard flue, fitting, disposal of your old unit, and a system flush. This is where BOXT differs from many installers. There are no estimates or vague ranges. The price you see at checkout is the same price you pay on installation day, provided your home doesn’t require specialist additional work.

Step 3: Choose Your Installation Date

After confirming the order, you select an installation date that suits your schedule. BOXT operates nationwide and often has next-day availability in many locations. This is particularly helpful if your boiler has failed unexpectedly and you need heat or hot water restored quickly.

Step 4: Gas Safe Installation

On the day of installation, a certified Gas Safe engineer arrives, checks the setup, completes the system flush, installs the new boiler, and makes sure everything is running safely. You’re then shown how to use your controls or smart thermostat so you can get the most from your new system.

Step 5: Warranty Registration and Aftercare

Once the boiler is fitted, BOXT handles the warranty registration for you. Most Worcester Bosch and Ideal models come with warranties of up to 10 years, giving long-term protection and peace of mind. You’ll also receive your Gas Safe certificate after the installation.

Wondering which boiler manufacturers performed best? Check out our comprehensive guide to the best boiler brands for the full rundown.

What’s Included in a BOXT Boiler Replacement?

One of the reasons BOXT has become such a popular choice is the clarity of what you receive for the fixed price. Many installers quote a low headline figure and then add extras as the job progresses. BOXT takes the opposite approach by bundling the key elements most households need into the upfront cost, so there are fewer surprises later.

New Boiler and Standard Flue Kit

Your fixed-price package includes a brand-new boiler from trusted manufacturers such as Worcester Bosch or Ideal. A standard horizontal flue kit is included, which is suitable for the majority of UK homes with combi or system setups.

System Clean and Inhibitor

To protect your new boiler and ensure it performs efficiently from the start, BOXT completes a thorough system clean. This removes sludge and debris from your radiators and pipework. An inhibitor is then added to reduce future buildup and maintain water quality inside the system.

Smart Thermostat on Eligible Models

Many packages include a smart thermostat such as Hive or Bosch EasyControl. These provide better temperature management, the ability to control heating schedules, and enhanced energy efficiency. It also helps you keep monthly gas bills stable.

Gas Safe Installation

A fully qualified Gas Safe engineer completes the installation. This includes removing the old boiler, installing the new one, upgrading the pipework where necessary, and ensuring the system operates safely. You’ll also be shown how the controls work before the engineer leaves.

Warranty and Certification

Most Worcester Bosch boilers fitted by BOXT come with warranties of up to 10 years. BOXT registers this for you, and your Gas Safe certificate is issued once the job is complete.

Old Boiler Removal

Your old unit is removed and disposed of responsibly. This saves you the cost and hassle of arranging disposal separately.

What’s Included vs What Traditional Installers Often Add as Extras

Included with BOXT	BOXT	Typical Local Installer
Boiler + standard flue	✔️	✔️ (usually)
System clean + inhibitor	✔️	Often extra
Smart thermostat	✔️ on selected packages	Rarely included
Old boiler disposal	✔️	Sometimes extra
Warranty registration	✔️	Sometimes left to the customer

Are you trying to determine who the best boiler installation company is? Check out our reviews of some of the most popular gas boiler replacement companies, including Boiler Central, Warmzilla, and British Gas.

What’s Not Included in the BOXT Boiler Replacement or May Add Cost?

Even with BOXT’s fixed-price model, there are situations where additional work may be required during installation. These aren’t hidden charges; they’re flagged during the online survey so you know about them before confirming the booking. Understanding these possibilities helps you compare installers accurately and avoid surprises on the day of installation.

Boiler Relocation

If you want the boiler moved to a different part of the home, additional pipework, flue adjustments, and labour are usually required. This applies whether you’re shifting the boiler upstairs, moving it into a utility room, or relocating it to meet modern safety clearances.

Complex or Unusual Flue Work

Most homes have standard flue positions, which are covered in the fixed price. Extra charges apply if your current setup involves long flue runs, vertical flues through the roof, or extensions that require specialist components.

Pipework Upgrades

Older systems sometimes require updated gas pipework to ensure the new boiler operates safely at the correct flow rate. If this is necessary, it will be shown in the assessment before checkout. Homes with very outdated heating systems may also require additional radiator valves or adjustments to the system.

Conversions Between Boiler Types

Switching from a system boiler to a combi, or converting from a regular (heat-only) boiler, requires more extensive work. This often includes removing tanks, adjusting pipework, and installing new controls. These projects naturally cost more than like-for-like replacements.

Asbestos-Related Work

If asbestos is present around the flue, cupboard, or old boiler area, specialist removal may be necessary before installation can proceed. This isn’t included in any standard boiler installation package.

Scaffolding or Specialist Access

Top-floor flats, tall external walls, or hard-to-reach flue positions sometimes require scaffolding. Engineers will flag this early so you understand the added cost before booking.

Cost Breakdown of BOXT Boiler Replacement vs Traditional Installers

When comparing boiler replacement options, most homeowners want two things: a clear upfront price and confidence that they’re not overpaying. BOXT’s fixed-price model makes this straightforward because the figure you see online already includes the boiler, standard flue, installation, disposal of the old unit, and essential system cleaning.

Traditional installers often quote a starting price and then add extras during the job, which can make it difficult to predict the final total accurately. Understanding how BOXT compares with typical local and national installers helps you see where the real differences lie.

Typical Replacement Scenarios and Costs

The prices below reflect common installation types seen across UK homes in 2025. These aren’t promotional numbers; they align with average national cost data and the ranges listed by major heating companies.

Scenario	BOXT Typical Price	Local Installer	National Installer
Combi to combi (straight swap, small/medium home)	From £1,790	£2,200–£2,600	£2,500–£3,000
System to combi conversion	From £2,579	£3,000–£3,500	£3,500–£4,200
Combi relocation (same type, new position)	£2,400–£2,900	£3,000–£3,400	£3,500–£4,300
Regular/heat-only to system or combi	£2,600–£3,200	£3,200–£3,800	£3,800–£4,500

These examples show why BOXT often comes out cheaper. The reduced overheads from an online-first model, bulk purchasing of Worcester Bosch and Ideal boilers, and efficient scheduling enable BOXT to keep installation costs lower without compromising on the quality of its engineers.

Why BOXT Tends to Save Money

There are several structural reasons BOXT can offer reduced pricing:

• No salesperson visits: The digital survey limits overheads.
• Bulk buying discounts: BOXT purchases boilers directly from manufacturers at scale.
• Predictable installation times: Clear surveys mean engineers spend less time assessing and more time fitting.
• Nationwide scheduling efficiency: Installers are allocated dynamically, resulting in reduced travel time.

The result is a pricing structure that remains stable and is often £500–£1,000 cheaper than traditional quotes for the same system.

Are you considering converting from a conventional to a combi boiler? Use our boiler installation cost calculator to get an estimation.

Choosing the Right Boiler Type for BOXT Boiler Replacement

Selecting the right boiler is just as important as choosing the right installer. A system that’s too small leaves radiators lukewarm and hot water inconsistent. A system that’s too large wastes gas and drives up bills. BOXT’s online survey helps narrow down suitable models, but understanding the differences between boiler types gives you more confidence in the decision.

Combi Boilers

A combi (combination) boiler heats water directly from the mains whenever a tap or shower is turned on. This removes the need for tanks in the loft or an airing cupboard. They’re popular in UK homes because they’re compact, efficient, and ideal for smaller properties or households with moderate hot water use.

Best for: Flats, 1–3 bedroom homes
Advantages: Fast hot water, no stored water, compact size, low running costs
Limitations: Can struggle when multiple taps or showers run at the same time

System Boilers

A system boiler works with a hot water cylinder but doesn’t require cold water tanks. These boilers maintain strong hot water pressure even when multiple taps are used simultaneously, making them well-suited for busy households.

Best for: Medium to large homes, 3–5 bedrooms
Advantages: Great for simultaneous use, more consistent hot water supply
Limitations: Requires a cylinder, takes more space than a combi

Regular (Heat-Only) Boilers

Regular boilers, also known as heat-only or conventional boilers, utilise both a hot water cylinder and a cold water storage tank. They’re common in older homes with traditional vented heating systems. If your home already has this setup and you have several bathrooms, keeping a regular boiler can be the simplest solution.

Best for: Older properties already set up with tanks, larger homes
Advantages: Handles multiple bathrooms well, compatible with older pipework
Limitations: Takes the most space, less efficient than a modern combi setup unless fully upgraded

Boiler Type Suitability at a Glance

Home Size / Household Type	Recommended Boiler Type	Typical Output Range
1–2 bedroom flat or small home	Combi	24–28 kW
3–4 bedroom semi-detached	System	30–35 kW
4–5 bedroom detached home	Regular or system	35–40 kW

Understanding where your home falls within these ranges helps you avoid oversizing or undersizing your boiler, common mistakes that can drive up running costs.

Check out our video on how to vet boiler brands/models in the UK:

Boxt Boiler Replacement Installation Process

Knowing what to expect during a boiler installation can significantly reduce stress, especially if your current boiler has failed unexpectedly. BOXT follows a structured process to ensure a predictable, efficient, and safe day. Whether you’re replacing your boiler like-for-like or carrying out a full conversion, the steps remain broadly the same.

Engineer Arrival and Safety Checks

Your Gas Safe engineer arrives at the agreed time and begins with a series of safety checks. These include inspecting the existing boiler, reviewing the flue position, and checking the condition of the gas supply. If anything differs from the online survey, it will be discussed with you before the installation begins.

Removing the Old Boiler

Once everything is confirmed, the engineer isolates the system and removes the old boiler. This includes disconnecting the pipework, removing the flue, and preparing the area for the new installation. BOXT handles the disposal of the old unit as part of the fixed price.

System Flush and Pipework Check

A system flush is carried out to remove any sludge, rust, or debris from radiators and pipework. This step protects your new boiler and keeps it running efficiently. The engineer also checks your gas pipework to ensure it supports the output and requirements of the new model.

Installing the New Boiler

The new boiler is fitted in the same location unless you selected a relocation. The engineer installs the standard flue kit, connects pipework, fits the condensate pipe, and sets up the controls. If you’ve chosen a smart thermostat, it will be paired and configured during this stage.

Commissioning and Testing

Once fitted, the boiler is commissioned. This involves measuring combustion levels, checking for safe operation, and running the heating and hot water to confirm everything is working correctly. The engineer balances the radiators and ensures efficiency settings are optimised.

Controls Demo and Handover

Before finishing, the engineer walks you through your new controls, including any smart thermostat features. You’ll learn how to adjust schedules, boost heating, and manage temperatures for different times of day.

Documentation and Gas Safe Certification

After installation, BOXT registers your warranty and arranges for your Gas Safe certificate to be issued. This document confirms that your boiler was installed safely and legally, and is essential for obtaining home insurance and for future property sales.

BOXT Boiler Replacement vs Local Installers: Pros and Cons

Choosing between BOXT and a traditional installer often comes down to what matters most to you: transparent pricing, speed, personal service, or flexibility for more complex setups. Each option has strengths. Understanding them side by side makes the decision easier and ensures you pick the approach that fits your home and your priorities.

Pros of Choosing BOXT Boiler Replacement

• Fixed, upfront pricing
  You know the full cost before the engineer arrives. This removes the uncertainty that sometimes comes with in-person quotes.
• Fast availability
  BOXT often offers next-day installation. This is particularly helpful if your boiler fails suddenly and your home has no heat or hot water.
• Strong manufacturer partnerships
  BOXT works closely with Worcester Bosch and Ideal, providing access to long warranties and reliable products.
• Streamlined online process
  No sales visits. No back-and-forth. The online survey gives immediate clarity.
• Nationwide network of Gas Safe engineers
  Installers are vetted, trained, and overseen by BOXT, which helps maintain consistent standards.

Cons of Choosing BOXT Boiler Replacement

• Less flexibility for unusual or highly complex homes
  Very old heating systems or properties with unconventional pipework may require a more customised approach.
• Online-only assessment
  Some homeowners prefer an engineer visit before installation day.
• Limited brand variety
  BOXT focuses mainly on Worcester Bosch and Ideal. If you’re looking for a niche boiler brand, a local installer may offer more options.

Pros of Choosing a Local Installer

• Personal relationship with one engineer
  Some homeowners value having the same person fit, service, and maintain the boiler each year.
• More flexibility on non-standard installations
  Older or unique heating systems may benefit from a bespoke inspection and plan.
• Broader brand selection
  Local installers may carry models from Vaillant, Viessmann, Baxi, or other specialist brands.

Cons of Choosing a Local Installer

• Prices can vary widely
  Some quotes are competitive, while others are significantly higher depending on demand or complexity.
• Longer wait times, especially in winter
  High seasonal demand can mean waiting several days or even weeks for installation.

Comparison at a Glance

Category	BOXT	Local Installer
Upfront pricing	Fixed	Varies by project
Installation speed	Often the next day	Can take longer
Brand choice	Worcester Bosch, Ideal	Wide range
Personal rapport	Lower	Higher
Suitability for complex systems	Moderate	High
Nationwide coverage	Yes	Depends on location

Is There Financing or Grants for BOXT Boiler Replacement?

Replacing a boiler is a significant investment, and many households want to understand the payment options available before committing. BOXT offers several flexible finance choices, and depending on your circumstances, you may also be eligible for government-backed support schemes. Taking a moment to explore these options can make the cost of upgrading more manageable.

BOXT Boiler Replacement Finance Options

BOXT provides the ability to spread the cost of a new boiler over monthly payments. This is especially helpful if your boiler has failed suddenly and you need a replacement right away.

• Low monthly payments starting from figures similar to £11–£15 per month, depending on the model and term
• No large upfront cost required for many plans
• Fixed interest rates so payments stay predictable
• Quick online approval during the checkout process

Finance availability varies based on credit checks and the boiler you choose, but the process is designed to be simple and fast.

ECO4 Scheme

The Energy Company Obligation (ECO4) supports households that meet specific eligibility criteria, such as those receiving certain benefits or living in lower-income homes that are difficult to heat. In some cases, the scheme covers the entire cost of a new, efficient boiler if the property qualifies.

If you think you might be eligible, it’s worth checking the criteria before booking a replacement. This can make a substantial difference to your final cost.

Boiler Upgrade Scheme (BUS)

While BUS is primarily focused on low-carbon systems, such as heat pumps, it remains relevant when considering a boiler replacement. The scheme offers grants to households switching away from fossil fuel heating.

If you’re comparing a gas boiler with a heat pump or exploring long-term energy savings, understanding BUS can help you decide which option suits your home and budget.

Local and Regional Support for BOXT Boiler Replacement

Some councils offer additional grants or support for improving home heating efficiency. These vary across the UK and usually focus on low-income households or homes with poor insulation ratings.

Exploring finance and grant options helps ensure you’re choosing the most cost-effective route for your household. Whether you opt for a pay-monthly boiler from BOXT or qualify for government support, the goal remains the same: to upgrade to a modern, efficient system without unnecessary financial pressure.

BOXT Boiler Replacement Aftercare, Warranty, and Support

A new boiler is a long-term investment, so the level of aftercare you receive makes a meaningful difference to reliability, running costs, and peace of mind. BOXT places a strong emphasis on post-installation support, and most ongoing protection is already built into the fixed price you pay.

Warranty Length and What It Covers

Most Worcester Bosch and Ideal boilers installed by BOXT come with warranties of up to 10 years. This means that if a manufacturing fault occurs, the repair is carried out at no cost to you. The length of the warranty varies slightly by model, but BOXT always shows the exact term during the online quote, so there’s no guesswork.

The warranty typically covers:

• Parts and labour for manufacturer faults
• Replacement of faulty components
• Callouts required for warranty repairs

Annual Servicing Requirements

To keep the warranty valid, the boiler must be serviced annually by a Gas Safe engineer. BOXT can arrange this for you, or you can use another qualified engineer if you prefer. Servicing keeps the system running efficiently, reduces the risk of breakdowns, and maintains safe operation.

Registration and Certification

BOXT handles the critical paperwork for you. Once the installation is complete:

• Your manufacturer’s warranty is registered
• Your Gas Safe certificate is issued and sent to you
• Building control notification (where required) is completed

This ensures your installation is legally compliant and properly documented, which is important for home insurance and future property sales.

Customer Support After Installation

If you ever need help, BOXT’s support team is available to assist with questions about controls, warranty queries, or troubleshooting common issues. Because your installation details are stored digitally, the support team can quickly identify your system and provide accurate advice.

Why Aftercare Matters

A boiler should last well over a decade. Strong aftercare helps ensure that your system stays efficient, your running costs remain predictable, and any rare technical issues are resolved quickly. Knowing you have support in place makes the entire replacement feel far more secure.

BOXT Boiler Replacement Real-World Reviews

Genuine user experiences help potential customers trust the process, and for BOXT, the feedback is largely positive, with a few cautionary points worth noting.

Trustpilot & Broad User Feedback

BOXT holds an excellent rating of 4.8 out of 5 stars on Trustpilot, based on over 50,000 reviews, indicating strong overall customer satisfaction. Reviewers overwhelmingly had a great experience with this company. Customers consistently praise the seamless service, highlighting the efficiency and ease of the booking process.

Consumers also commend the professionalism, politeness, and expertise of the staff, noting their helpful explanations and tidy work. Others appreciate the up-to-date communication and the speed of installation.

One user on Reddit reported:

“I used them two months ago and the service was fantastic, I booked a month in advance and got an extra £200 off the price. The installer was very professional and ensured everything was done properly, leaving the area tidy. Oh, and they were £800-£1000 cheaper than any local plumbers (I got quotes from 3 independent companies).”

Summary of Key Strengths & Weaknesses from Reviews

Strengths:

• Fast turnaround and ease of booking, including next-day installs in many cases.
• Transparent pricing and an online survey simplify the quote process.
• Good aftercare with long warranties (up to 10 years) and clear documentation.
• Positive user sentiment on the engineers’ professionalism and the cleanliness of their work.

Weaknesses/Things to Check:

• Some users say that for non-standard installations (large homes, complex pipework, relocations), extras may arise or the “finish” may be less premium.
• A next-day model may mean that some customers don’t get as much flexibility (e.g., relocating their boiler) as they would with bespoke, local installers.

Quick BOXT Boiler Replacement Checklist Before You Book

A little preparation helps make installation day smoother and ensures your BOXT engineer has everything needed to complete the job efficiently. Most of the steps take only a few minutes, yet they help avoid delays and unexpected complications.

Take Clear Photos of Your Current Setup

BOXT relies on the photos you upload for the fixed-price assessment. Clear images of the boiler, pipework, flue, controls, and the surrounding space help ensure the quote remains accurate.

Confirm Your Boiler Type and Location

Check whether your current system is a combi, system, or regular boiler. Also note its location: in the kitchen, utility room, airing cupboard, or loft. This information helps the survey match the best replacement models.

Consider Whether You Want a Like-for-Like Replacement or a Change

If you’re considering switching from a system boiler to a combi boiler, relocating the boiler, or upgrading to a smart thermostat, it’s best to make a decision before booking. These upgrades are possible but may add time or cost.

Ensure Clear Access for the Engineer

Ensure the engineer can access the boiler and pipework safely. Clearing surrounding cupboards or removing stored items helps speed up the installation.

Plan for Heating and Hot Water Downtime

A standard combi-to-combi replacement typically takes several hours to complete. More complex work can take a full day or longer. Knowing this ahead of time helps you prepare, especially if you have children or work from home.

Final Thoughts on BOXT Boiler Replacement

BOXT’s approach appeals to homeowners who want clarity from the start. The fixed-price quote, the simplicity of the online survey, and the availability of next-day installation significantly reduce the stress typically associated with boiler replacement. For many properties, especially those needing a straightforward combi or system upgrade, the service offers strong value and predictable results.

It’s also worth remembering that every home is different. Some properties benefit more from the flexibility of a local installer, especially when dealing with older pipework or complex layouts. Taking a moment to compare options, check your system requirements, and explore finance or grant support ensures you’re making the most informed choice.

Whether you choose BOXT or another reputable installer, the goal remains the same: a safe, efficient boiler that keeps your home warm, your water running hot, and your energy bills as low as possible. With the right replacement, you’ll feel the difference from the first use and continue to see the savings in the years ahead.

FAQs on BOXT Boiler Replacement

How Much Is a New Boiler From BOXT?

Most straightforward combi-to-combi replacements with BOXT start from around £1,790, including the boiler, standard flue, installation, disposal of the old unit, and a system clean. More complex work, such as conversions or relocations, typically starts from £2,579, depending on your home and boiler type.

Why Is BOXT Boiler Replacement So Cheap?

BOXT operates an online-first model, which removes the need for in-home sales visits. They also purchase boilers directly from manufacturers at scale and use a large nationwide network of engineers to keep labour costs predictable. These efficiencies reduce overheads, allowing them to offer fixed prices that are often lower than those of traditional installers.

Is BOXT Owned By Bosch?

No. BOXT has only been collaborating with Worcester Bosch since 2017. They also have strong partnerships with more award-winning companies, including Vaillant, Navien, Tesla, and SunSynk. This gives BOXT direct access to products, long warranties, and strong manufacturer support.

Which Boilers Does BOXT Use?

BOXT installs boilers from trusted brands such as Worcester Bosch, Vaillant, and Navien, which are well-established in the UK. Worcester Bosch remains their main product line due to the partnership and long warranty terms available.

What Is the Most Reliable Boiler Brand?

Worcester Bosch, Viessmann, Vaillant, and Ideal consistently rank among the most reliable brands in the UK. According to consumer reviews and industry surveys, Worcester Bosch often scores highest for reliability, ease of use, and long-term performance.

Are BOXT Boilers Worth It?

For many households, yes. BOXT offers predictable fixed prices, fast installation, long warranties, and access to premium boilers. Their service is particularly strong for standard installations and straightforward replacements. Homes with unique layouts or older pipework may still benefit from quotes from local installers for comparison.

Sources and References

• Energy Saving Trust – Boiler types explained
• Trustpilot – BOXT
• Reddit – Has anyone used the company BOXT to have a boiler installed?