Heatable vs Warmzilla: Boiler Installation Review
Update: November 2025
Although Heatable and Warmzilla have their merits, iHeat* is our recommended new boiler installation provider in November 2025.
We found their fixed price, online quotation system very easy and quick to navigate through, and got the most competitive price out of all the providers we tested.
A good range of boilers were available to select from with warranty and after-care arranged and confirmed by iHeat*.
No hidden costs were added and a financing option to pay monthly was available to apply for, if required.
A next day installation slot was available and the communication was efficient.
To get a wider range of opinions, a high Trustpilot rating indicates most customers had a very positive installation experience. As of November 2025, iHeat are also a Which? Trusted Traders approved service.
Visit iHeat* for a no-obligation and instant online quote.
Key Factors When Choosing Between Heatable and Warmzilla Boilers
When selecting a new boiler system for your home, key considerations include efficiency, reliability, cost, and the quality of installation and customer service. Comparing the offerings of leading brands Heatable and Warmzilla on these factors can help guide your decision.
Both companies provide condensing combi boilers built to high manufacturing standards. However, feedback from customers highlights some notable differences to weigh up.
Heatable Boilers
Heatable is a well-established UK boiler brand serving households nationwide for over 15 years. Their gas condensing combi boilers feature cutting-edge burner technology to maximise efficiency.
Customers praise Heatable as a reliable, mid-range priced boiler option. Their customer service also receives consistently favourable reviews. Here are some of the common pros and cons mentioned:
Pros
– Quick delivery times and professional installation service
– Low noise output compared to similar models
– Excellent heat output and hot water performance
– Easy to use and maintain for homeowners
– Company provides ongoing customer support
Cons
– Installation can be pricier than competitors
– Parts may be trickier to source than more common brands
Overall, feedback suggests Heatable hits a good balance between value for money and quality.
Warmzilla Boilers
Warmzilla is a newer entrant disrupting the boiler space with smart home-optimised designs. Their high-end products prioritise cutting carbon emissions through increased efficiency.
Early customer reviews praise their innovative features but highlight some first-generation drawbacks. Common feedback includes:
Pros
– Intelligent zoning for multi-room energy control
– Very high 94%+ efficiency rating
– Lower environmental impact than standard models
– Quiet performance
– Responsive customer service team
Cons
– Premium price point
– Connectivity features may need troubleshooting
– Unknown reliability over time
– Installation partners still establishing expertise
While pricier, Warmzilla appeals to eco-conscious homeowners seeking the latest energy-saving boiler advancements.
Key Boiler Installation Considerations
Beyond the boiler itself, installation factors also significantly impact functionality. Key aspects to discuss with your engineer include:
Sizing
– Accurately rating heat and hot water needs for your home’s size and insulation
Positioning
– Minimising pipe runs to radiators and hot water outlets
– Leaving access for future maintenance
Controls
– Optimising time schedules and thermostats for efficiency
– Connecting “smart” features like mobile apps
Both Heatable and Warmzilla work with registered installer networks across the UK. However, standards can still vary. Checking credentials like Gas Safe registration and reviews will help verify quality.
Cost Comparison
According to customer reports, a new Heatable combi boiler and installation averages £2,000-£2,500. Warmzilla’s smart systems fall into a premium bracket of £3,000-£4,000 fully fitted.
With all models, real-world running costs depend hugely on usage and maintenance. Condensing combis usually save £100-£300 annually over older designs.
Factors Affecting Price
– Efficiency rating (Warmzilla up to 94% vs Heatable around 90%)
– Dimensions and output of chosen unit
– Additional controls like thermostats
– Access needs e.g. scaffolding
– Your location
Weighing up the long term energy savings versus higher upfront investment will help determine if Warmzilla’s premium fees make sense.
Final Considerations
Visit showrooms to compare boiler build quality and acoustics in person if possible. While model choice matters, investing in professional installation is equally important for efficiency, safety and peace of mind.
Think carefully about aftercare too. Heatable offers lifetime assistance, while Warmzilla focuses on technology. Remote monitoring or annual services may suit different homeowners.
Weighing all aspects from reputation to real-world functionality will guide you in choosing between Heatable, Warmzilla or alternative boiler brands.