Warmzilla Boilers: A Complete Guide to Their Prices, Reviews, Warranties And a Lot More
Warmzilla is an innovative online platform dedicated to simplifying the process of purchasing and installing new boilers. Founded to streamline the boiler buying experience, Warmzilla gives UK homeowners access to top-rated boilers for an average of between £1,490 and £4,000 including VAT and cost of installation.
Founded by industry professionals with over 25 years of experience, WarmZilla takes pride in offering an easy, hassle-free service without any salespeople and no hidden extras. They also provide convenient, affordable and flexible payment plans that suit your situation.
The Cardiff-based company has teamed up with some of the countries leading boiler manufacturers including Worcester Bosch, Ideal, Baxi and Vaillant. If you’re looking for a reliable, energy-efficient boiler, Warmzilla can help you choose the right boiler for your home.
You also have the peace of mind that your new boiler will be fitted by a qualified gas-safe engineer.
But how does Warmzilla perform in the market and how does it measure up against other boiler suppliers?
Aim of the content of this article?
At Boiler Prices, our mission is to guide UK homeowners in identifying the best boiler for their home at the most competitive price. Our website offers comprehensive information on what to consider when choosing a boiler, and we connect you with local suppliers and installers to ensure you get the best deal.
In addition to providing detailed boiler reviews, we thoroughly researched the UK boiler market and reported on consumer feedback. We compare brands, including Warmzilla, to highlight which companies are receiving positive reviews from real customers. This is where the valuable insights are found!
The information we share is not only based on customer reviews but also incorporates the views and experiences of frontline professionals in the energy consumer industry. Our goal is to help you determine whether a Warmzilla boiler or any other brand, is the right fit for your home.
By the time you finish reading this page, you will know:
- The different types of energy-efficient boilers Warmzilla supply so that you can decide which type of boiler serves your heating and hot water needs
- How many kW do you need to comfortably heat your home and meet your real-time hot water demands
- The cost, models and efficiency of Warmzilla boilers
- The boiler specifications and dimensions that can be installed in your home (which type of boiler is best for you)
- Boiler comparisons that fall into the same price point and star rating as Warmzilla so you can broaden your search easily
Warmzilla: A Trusted Name in Boilers
Warmzilla is a modern, innovative company revolutionising the boiler installation industry. Founded in 2019, Warmzilla aimed to simplify and streamline the often complex and daunting process of purchasing and installing a new boiler.
The company’s founders wanted to create a more customer-centric and transparent approach to replace boilers. They set out to create a platform that combines convenience with competitive pricing and quality service.
Warmzilla was established by a group of heating industry experts and entrepreneurs who were frustrated with the traditional boiler-buying experience.
They noticed that the process was often time-consuming, opaque, and filled with hidden costs. To address these issues, they created an online platform that offers instant fixed-price quotes and a straightforward, user-friendly purchasing process.
The company prioritise customer satisfaction by offering high-quality products, transparent pricing, and excellent aftercare services. This approach has been the leverage for rapid growth and the company has quickly become a recognised name in the UK boiler market.
Considerations when buying a Warmzilla Boiler
Warmzilla is the youngest of the new group of online boiler installation companies dedicated to simplifying the process of purchasing high-quality and reliable boilers for homeowners.
However, despite the assistance these companies provide, it’s still crucial for UK homeowners to understand which boiler best suits their heating and hot water needs and to be aware of the key features to consider when buying a boiler.
Energy-Efficiency
All modern gas boilers are awarded an energy efficient rating which is determined by the amount of energy the unit saves. ErP ratings are given from A to G. An A-rated boiler ensures at least 92% energy efficiency, 94% is A+ and 98% is A++. However, the information provided about ErP ratings is vague or non-existent.
Warmzilla provides a selection of boilers from leading brands that are rated A and above. They are the most energy-efficient you can buy. The higher the rating, the better the efficiency. But the higher the cost.
Dimensions
Modern wall-hung boilers are designed to fit compact spaces, making them ideal for kitchen cupboards or understairs closets. The space available for installation may influence your choice of model.
Combi boilers are popular because they eliminate the need for additional cylinders and water tanks, which are typically required for traditional heat-only and system boilers.
If you prefer not to use a combi boiler, inquire about the space required to install a water cylinder and tank. This won’t be a concern if you already have one installed.
Performance Output in kW
The performance output of a boiler, measured in kilowatts (kW), is crucial for ensuring it can effectively meet your home’s heating demands. An undersized boiler may struggle to provide adequate warmth, while an oversized one can lead to inefficiencies.
Warmzilla’s online questionnaire helps you select the correct boiler size based on factors such as the number of bedrooms and bathrooms in your home. This ensures you choose a boiler with the appropriate kW output to efficiently and effectively heat your space.
Ease and Cost of Installation
The accessibility and complexity of the installation site can significantly impact labour costs. According to Gas Safe engineers, Warmzilla boilers are among the easiest to install, and their components are readily available in the UK.
This means that installation, servicing, and maintenance costs are less likely to be inflated by labour charges. It’s important to factor in the cost of professional gas-safe installers when budgeting for your new boiler and remember that installation costs are typically not included in the price shown for the boiler.
While Boiler Prices cannot provide specific rates for every boiler installation provider, we can state that the average installation cost for a new energy-efficient boiler in the UK ranges from £1,100 to £1,800. Warmzilla gas boiler prices could potentially save you hundreds of pounds compared to boilers that are more difficult to install.
To find out exactly how much you should expect to pay to install a new Warmzilla boiler in your home, take advantage of the Boiler Prices ‘get a quote’ feature.
Our convenient features give you access to a wide range of suppliers and installers in your area that compete for prices. We give you the three best options and you can choose whichever quote you prefer — and there’s no obligation to buy. Therefore, there’s nothing to lose by generating a selection of the best quotes.
Get your free quote now by clicking the link and filling out the question form.
Warranty
All gas boilers from Warmzilla come with a parts and labour manufacturer warranty. Warmzilla pass on the full manufacturer’s warranty to the customer which is determined by the model and type of boiler you purchase. This can be anything from 2 to 10 years.
Warmzilla registers and activates the warranty on your behalf, ensuring you are covered from the moment your new boiler is installed.
Warmzilla Combi Boilers: Compact, Efficient, and Cost-Saving
Combi boilers offer several key advantages over other types of boilers. Chief among them is their compact size.
Unlike system boilers and traditional heat-only boilers, which need separate tanks for hot water storage, combi boilers consolidate both heating and hot water functions within a single unit. This space-efficient design is particularly beneficial for properties with limited space.
In addition to their space-saving attributes, combi boilers provide hot water on demand. However, it is important to note that they may run out of hot water if the boiler lacks the necessary kW output to meet your demands.
Despite this, combi boilers generally offer excellent water pressure, making them well-suited for households with multiple bathrooms. Because water is heated as it is used, users won’t experience a pressure drop even if multiple showers are in use simultaneously.
When it comes to installation, combi boilers are often simpler and quicker to install compared to traditional boilers with separate tanks. This streamlined installation process translates to lower installation costs and minimises disruption to your home during the installation phase.
Overall, combi boilers offer a convenient and efficient solution for meeting both heating and hot water needs in a wide range of residential settings.
Note: the prices listed below are the purchase prices for the boiler only. They do not include installation costs.
| COMBI GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
|---|---|---|---|
| Vokera Excel 29 Combi Boiler | 29kW | medium to large-sized homes | £764.88 |
| Ideal Logic C30 Combi Boiler | 30kW | small to medium-sized homes | £745 |
| Worcester Bosch Greenstar 28 CDi Compact Combi Boiler | 28kW | medium to large-sized homes | £973.44 |
| Worcester Bosch Greenstar 18i System Boiler | 18kW | medium to large-sized homes | £888.72 |
| Worcester Bosch Greenstar 24 Ri Regular Boiler | 24kW | medium to large-sized homes | £877.49 |
Warmzilla System Boilers: Easy installation, efficient heating, and customisable options
System boilers have become less popular with the rise of combi boilers, primarily due to their reliance on a water cylinder. While the boiler units themselves have similar dimensions for both types, system boilers occupy more space because of the cylinder.
However, system boilers are known for their reliability in providing a consistent flow of hot water. They operate by heating water from the mains and storing it in a cylinder until it’s needed.
This makes them well-suited for larger homes with two or more bathrooms and higher hot water demands. With a consistent supply of stored hot water, users do not experience a drop in temperature or pressure when multiple taps or showers are in use simultaneously.
Note: the prices listed below are the purchase prices for the boiler only. They do not include installation costs.
| SYSTEM GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
|---|---|---|---|
| Worcester Bosch Greenstar 18i System Boiler | 18kW | medium to large-sized homes | £888.72 |
Warmzilla Heat Only Boilers: Versatility, Efficiency, and Reliability
Heat-only boilers, also referred to as Regular boilers, were once the most widely recognised type of boiler but are gradually falling out of favour due to their cumbersome design.
These boilers necessitate separate hot water and cold water tanks, making them suitable only for houses or large apartments with adequate storage space.
Despite this limitation, heat-only boilers have the advantage of being able to accommodate high hot water demands even when multiple taps are in use simultaneously.
Similar to system boilers, heat-only boilers can be compatible with renewable energy sources such as solar thermal panels. They can integrate with these systems to enhance energy efficiency and reduce carbon emissions further.
Note: the prices listed below are the purchase prices for the boiler only. They do not include installation costs.
| COMBI GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
|---|---|---|---|
| Worcester Bosch Greenstar 24 Ri Regular Boiler | 24kW | medium to large-sized homes | £877.49 |
Living with your Warmzilla boiler
Warmzilla Boiler Warranties
Warmzilla provides boiler warranties designed to offer homeowners peace of mind and protection in case of boiler breakdowns or malfunctions. These warranties typically cover the cost of repairs or replacements for various boiler components, including the heat exchanger, burner, controls, valves, and other critical parts.
Depending on the selected warranty plan, coverage may extend to labour costs for repairs conducted by qualified engineers. Some plans even include an annual boiler service to maintain optimal system conditions and identify potential issues before they escalate.
The duration of Warmzilla boiler warranties typically ranges from 2 to 10 years, depending on the chosen boiler model. Higher-end models generally come with longer warranties.
It’s important to note that warranties reflect the quality and reliability of a boiler. Generally, the shorter the warranty period, the higher the likelihood of malfunctions. Longer warranty periods offer extended protection against unexpected breakdowns and should provide greater peace of mind.
Some Warmzilla boiler warranties may offer the option to renew or extend coverage at the end of the initial warranty period. This allows homeowners to continue protecting their boiler beyond the initial coverage period.
Homeowners should carefully review the terms and conditions of their Warmzilla boiler warranty to understand any exclusions or limitations. Common exclusions may include pre-existing faults, damage caused by improper installation or maintenance, and normal wear and tear.
Additionally, Warmzilla specialises in various boiler insurance policies that provide cover once the boiler warranty has expired. However, the effectiveness of these policies may vary, and homeowners need to assess their individual needs and circumstances before opting for additional insurance coverage.
Warmzilla Boiler Controls
Most premium boilers come equipped with intelligent controls and a variety of innovative features aimed at helping users use their heating system efficiently. The user-friendly controls can be adjusted via a wall-mounted thermostat, smart device or voice-activation hub such as Google Nest.
These controls are designed to improve comfort, convenience, and energy efficiency. Certain boiler controls include weather compensation features, which automatically adjust the boiler’s output according to the outdoor temperature to ensure consistent indoor comfort.
Warmzilla Boiler Cover and Breakdown Options
Warmzilla offers a variety of boiler cover and breakdown options to ensure homeowners have peace of mind and protection against unexpected boiler issues. Each boiler cover plan provides different levels of coverage for repairs, replacements, and servicing.
It’s important to be cautious of enticing introductory offers and inquire about the cost of the policies beyond the first year.
The most basic entry-level policy starts from as little as £8.58 a month. This covers you for annual serving, and faults to boiler parts and controls. Upgrade to Extra and you’ll also get cover for heating at £10.15 a month.
To also include cover for plumbing and electrics you should go for the total package at £20.54 a month.
It’s also crucial to carefully consider the policy you choose. Warmzilla is meticulous about what its insurance policies cover and what they don’t. Customers may be led to believe that the policies cover more than they do, so it’s essential to ask the sales representative about any exclusions.
Warmzilla Boiler Surveys and Reviews
Since Warmzilla doesn’t manufacture boilers themselves, we can only compare them against other heating solution providers of the same ilk.
However, the Cardiff-based company performs admirably well against its competitors which include heavyweights like British Gas, Warmzilla, Homeserve, Heatable, Glow Green and iHeat.
When it comes to providing access to quality boilers, Warmzilla offers a decent range, although not as extensive as Warmzilla and Homeserve. However, customers still have access to reliable and reputable brands such as Worcester Bosch, Ideal, Vaillant, and Baxi, all of which offer generous manufacturer warranties.
Like all the other online companies, other than British Gas, Warmzilla passes on the equivalent warranty to the customer. Warranty options can be extended to 10 years or more depending on the company.
For example, Worcester Bosch offers 12-year warranty extensions on selected models.
Warmzilla maintains a commendable customer satisfaction score based on Trustpilot reviews. The company’s rating has risen since we published our previous review.
In Septemeber 2020, Warmzilla was sitting pretty with an admirable score of 4.7 on Trustpilot. What’s more, 92% of reviewers gave WarmZilla a rating of excellent and most customers said the fixed price offered was very competitive.
It’s now May 2024, and Warmzilla has an overall rating of 4.8 out of 5, yet the number of 5-star reviews has slipped to 87%. This is because of how Trustpilot weights its scoring.
Companies start at just above average on 4.3 stars and either improve or decline depending on how well they perform in the eyes of customers.
Warmzilla appears to be keeping more customers satisfied than cause for complaint. However, they still have under 2000 respondents which may skew the perception of how well they perform.
The 5% drop from 92 to 87% of 5-star reviews has predominantly gone to 4 stars which is pretty good. There has only been a 2% rise in 1-star complaints. To be fair, Warmzilla is only five years old and may still be finding its way in the world.
However, when you read some of the reviews, it appears the company’s customer service team may not be as polite or considerate as you would expect. Bullying and threats of legal action have been claimed.
Whilst we cannot verify what is happening behind the scenes, these accusations are not isolated. Moreover, the response from Warmzilla’s customer service team is not helpful. If anything, it is dismissive.
How do Warmzilla boilers compare with other boiler brands?
With regards to other heating system suppliers, Warmzilla offers access to the same energy-efficient boilers as its rivals British Gas, Warmzilla, Homeserve, Heatable, Glow Green and iHeat.
Although the Trustpilot rating appears to bring the Cardiff-based outfit in line with the industry leaders, Warmzilla (4.9) and Heatable (4.8), reports of an aggressive customer service team are somewhat troubling and certainly not as caring as rival brands.
Warmzilla also gets the upper hand by offering the Google Nest and Hive mini thermostats for free. Like all the other companies Warmzilla charges additional fees of £279 for Nest and £169 for Hive.
However, Warmzilla does offer competitive prices and even throws in a selection of free goodies as well:
- System cleanse before the boiler is fitted
- System filter – collects residue that builds up in your system
- Smart thermostat to enable you to control the heating and hot water
As you might expect from founders who have a background as heating engineers, Warmzilla is praised for the quality and speed of its installation. Like Heatable, but unlike Warmzilla, it’s possible to have a boiler fitted within 24 hours, although a realistic timeline is 2 to 3 days.
However, there are complaints about boilers not being installed correctly. This is not new. You will find the same type of complaints on all the other boiler supplier reviews as well.
Similar to Warmzilla, Heatable, Green Glow and iHeat, Warmzilla matches the boiler warranty and registers it with the manufacturer on behalf of the customer, ensuring coverage and peace of mind. This alleviates the need for customers to register the warranty themselves within the typically required 30-day window.
Flexible payment plans are also available. Warmzilla has teamed up with Novuna who offer monthly payment plans as low as £9.70. Whilst most of the other companies offer 0% interest for the first year or two, monthly payments do skyrocket afterwards.
If you want consistently affordable and manageable monthly payments until your boiler is fully paid for, Warmzilla is probably the best solution.
We can’t give you an exact price, of course. The monthly cost and length of your payment plan depend on which boiler you choose. But it’s worth knowing that WarmZilla offers a range of affordable options and premium packages to suit you.
Your new boiler also comes with a 12-month WarmZilla labour guarantee and a manufacturer’s guarantee, which can be anything up to 10 years as standard.
Boiler Prices Verdict on the Warmzilla Boilers: 4.5/5
On the surface, Warmzilla looks amazing. Scratch below the surfaces and you find some nasty blemishes that could tarnish a glowing reputation.
Let’s focus on the positives first.
Warmzilla offers competitive pricing and next-day installation options, ensuring prompt replacement of broken boilers with energy-efficient models, which is especially crucial during the winter months when heating is essential.
Access to leading boiler brands ensures homeowners can select reliable, durable, and energy-efficient boilers suitable for their needs, with a wide range of price points, sizes, and performance outputs available.
Warmzilla’s online questionnaire assists customers is user-friendly, fast and helpful. The process only takes a few minutes and helps homeowners in finding the right boiler for their home, supplemented by a responsive customer service team for additional guidance if needed.
The company’s contracts with leading boiler manufacturers result in favourable warranty lengths, including options for extended warranties. However, customers need to review warranty terms to understand coverage limitations and avoid potential misunderstandings.
Warmzilla also offers affordable finance options which paves the way for consistent and affordable payments until the boiler is completely paid for. Payment plans offered by other companies can take a sharp increase once the 0% interest-free credit expires.
And so we come to the blemish.
While Trustpilot reviews generally praise Warmzilla’s customer service, it’s worth noting that experiences can vary. This is often the case with any large company.
We are particularly disturbed by reports of bullying, being called a liar and the obvious tactic of sweeping responses under the carpet. This type of service is not what you want from a heating company when your boiler breaks down in the dead of winter.
To play devil’s advocate, Warmzilla is a relatively new company and the roadblocks they hit throughout 2022 and 2023 endangered its healthy Trustpilot reputation.
Since then, the company seems to resolved the issues it was having during the rocky patch. Far fewer complaints have been received in 2024 and it’s clear that efforts are being made to resolve issues.
As a result, Warmzilla has earned an extra point on its overall Trustpilot score from 4.7 to 4.8 this year.
In addition, issues related to warranty coverage often stem from specific warranty conditions rather than service quality, underscoring the importance of understanding warranty terms directly from the boiler brand or through Warmzilla.
Moreover, Warmzilla simply passes on the warranty from the manufacturer. This leaves the responsibility of performing the necessary repairs with the manufacturer.
And this is really where things get frustrating for customers who get shoved from pillar to post between two companies, neither of which will accept responsibility. The danger of dealing with an online middleman can ultimately leave you in limbo.
Overall, Warmzilla emerges as a reliable option for installing new energy-efficient gas boilers in the UK, backed by competitive pricing, prompt installation, access to reputable brands, and supportive customer service.
However, as we have seen by reviewing every other boiler manufacturer and online heating supplier, not everybody experiences the level of service you expect. Fortunately, the majority of Warmzilla customers do.
So, why buy a boiler from Warmzilla?
Simplicity and competitive prices stand out as Warmzilla’s unique selling points. The website is easy to use, quick and useful to homeowners who don’t know which boiler is the best option to satisfy their heating demands.
The order process could not be simpler. You go onto the WarmZilla website and complete the online survey, which takes about a minute or two to complete. The questions are simple to answer and relate to your home and your existing boiler. Once you finish answering all the questions in the survey, you’re shown a selection of boilers recommended for your home and needs.
All of the boilers listed on the screen will be shown with a fixed price quote, which includes the price of VAT and installation. You might be given a choice of budget and premium boilers to buy, and you can check the length of the guarantee that comes with each boiler.
After you choose your boiler, you need to select how you want to pay for it. You have two options, including a one-off payment or setting up a finance plan that lets you pay for your boiler in instalments.
Next, you select an install date before giving WarmZilla your name, email address and phone number, as well as the installation address and your payment details – and then you’re done.
WarmZilla takes care of everything from here, so all you have to do is wait for your new boiler to be delivered on your chosen install date.
When you complete the online survey, you’ll be offered a one-off payment price allowing you to pay for your boiler outright if you wish.
Alternatively, you can choose a finance plan by clicking on the ‘Finance Options’ box next to your chosen boiler. Once you click the box, a finance calculator appears on the screen to make it easy for you to view the different options available. This calculator lets you select the finance plan with payment term (3 to 10 years) and the deposit amount (from £0) you’re happy to pay.
The finance provider is Novuna, and you’ll need to complete an application with them to apply for a finance plan. According to WarmZilla, the acceptance rate is high, so you could still be approved for finance if you have a bad credit rating.
It’s also worth mentioning that you can pay as little as £10 per month and you can change the monthly payments to suit your circumstances.
Lock In Your Boiler Price Now width Warmzilla
Why You Can Trust Boilers Prices
Boiler Prices were established in 2013 to help you identify the best boiler for your home and to get access to the most affordable boiler quotes from a central location without having to waste time shopping around. Our service is fast, efficient and effective. We source the best quotes offered by national installers and local boiler installers.
But it’s all very well and good reading the information we publish on our website, but how do you know you can trust the advice we provide?
Well, first and foremost, we want to assure you that Boiler Prices does not have any direct affiliation with Warmzilla or any other boiler manufacturer. The information we present is 100% unbiased, impartial and given to the best of our knowledge.
Moreover, we source our information from customer feedback, and recognised review websites (like Which? and Energy Savings Trust etc) together with gas-safe engineers and other professionals working in the energy and heating sector.
We appreciate that UK homeowners want to know if these new energy-efficient boilers are reliable, efficient and available for a good price. Boiler Prices not only step in to provide information you can trust, but we also save you hours having to research the extensive boiler market.
For the best and most cost-effective boiler prices, you will have to do some shopping around. We recommend getting a quote from a national installer and a local boiler installer to see which gives you the best price. When you use Boiler Prices as your platform to look for boiler prices this is what we provide you with as a matter of course.
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All these factors make Boiler Prices the most trusted source of information about energy-efficient boilers – because we provide up-to-date and accurate information together with honest appraisals that say it how it is.