Many customers describe fast, professional installation visits with clear, polite engineers. Reviews often mention easy online booking and competitive prices. Fewer reviews point to long waits for follow-up visits and leaks that were not fixed after the work. Aftercare and booking annual servicing come up most often as the ongoing concern.
Examples from available reviews (Nov 2021 – Feb 2026).
Fantastic deal and smooth, professional service with excellent aftercare.
“Got a fantastic deal on Warmizlla for my Viessmann setup”
Fast installation, quick responses, and perfect, hassle-free service.
“Absolutely brilliant service from start to finish!”
Long delays for boiler service led to leak and ongoing unresolved repair.
“Took nearly 7 weeks before I could get my boiler serviced.”
Reviewer reports terrible service and no aftercare.
“Terrible service 0 after care avoid avoid avoid”
Installation feedback often mentions on-time teams, tidy work, and engineers fixing issues on site, such as flue routing or faulty parts. Several reviews describe a quick move from quote to installation and praise specific engineers. A smaller group focuses on the difficulty of booking follow-up visits and delays with annual servicing.
Many reviewers point to competitive prices, clear quotes, and good value for boiler replacements or upgrades. Some mention finance options and say there were no surprise charges. Value comes up often, though it does not dominate the dataset.
Customers often describe a smooth process, with clear explanations, tidy installs, and quick completion. Several accounts praise the online form and booking journey for being simple and for securing dates quickly. A smaller number report frustration when later service visits took a long time to arrange.
Comments on products and workmanship are mostly positive, with mentions of reliable EV chargers, well-fitted boilers, and engineers who clean and calibrate equipment. Reviewers often describe long-lasting installations and helpful setup walk-throughs. Reports of product problems are limited compared with service complaints.
Many reviews highlight timely updates, clear post-install paperwork, and polite, informative engineers. Customers often say staff kept them updated at each step and responded quickly. Communication issues are not common, but they appear alongside aftercare concerns.
Reviews split between many highly satisfied customers praising installation, value, and communication, and a smaller set of low ratings tied to delayed follow-ups and leaks that stayed unresolved. Positive reviews often recommend the company and mention repeat purchases. Negative reviews focus more on post-install service delays than on the initial installation quality.
For each review, the core experience based on original source reviews.
Sources: Trustpilot (40) · Reviews (19) · Reviews (1) · Quotes shortened · As of: February 2026
Installation was swift, professional, and offered at a great price.
“Great Job - very swift and professional.”
Boiler service completed with no issues; great service.
“All good no issues great service.”
Engineer Claudiu was professional and recommended by reviewer.
“Claudiu demonstrated professionalism in everything he did.”
First service with Warmzills was thorough and very helpful.
“this first service with Warmzills was the most thorough and best service of all.”
Engineers were friendly, performed high-standard work and cleaned up.
“work done to a high standard”
Excellent, considerate installation with clear explanations and competitive options.
“Excellent service and kept abreast of all arrangements..”
Polite follow-up and professional, caring installation; highly recommended.
“Fantastic service from initial contact to boiler installation”
Reviewer thanks WarmZilla for installing a new EV charger.
“Thank you for my new EV charger!”
EV charger installed professionally; product reliable with useful app.
“The charger itself is excellent — fast, reliable, and easy to use.”
Second boiler fitted with good service and no issues.
“Good service with no issues.”
Quick quote, helpful communication, interest-free finance and excellent installation follow-up.
“Getting a quote was so quick and easy”
Clear communication and prompt paperwork after boiler installation.
“Communication has been on point”
Customer service resolved issues quickly and satisfactorily.
“Very happy with the customer service.”
Excellent service provided during new gas boiler installation.
“Excellent service when installing our new gas boiler.”
Effortless installation, interest-free finance and empathetic, clear customer support.
“the customer support was amazing”
Positive experience working with the company on installations.
“Wonderful people to work with”
Praise for the service and customer support received.
“Beautiful service and customer support”
Reviewer says the company cares.
“At last a company that cares 🙂”
Company praised for first-class support staff and service.
“first class support staff”
We choose the boiler, paid for it, and received regular updates about its development.
We were advised by a phone call that our boiler was ready for fitting, so I set a date.
When the fitter arrived on the scheduled day he informed me that it was not the boiler I ordered but a different one.
This caused some complications for us since we had already paid for the boiler and had to reschedule everything at short notice, which they did a good job and replaced the boiler I ordered.
The boiler was fitted on time and looks excellent.
The engineers were very courteous and friendly,
This page combines submitted experiences with public reviews from platforms such as Google, Trustpilot, etc. Recurring points are summarised without changing the content of reviews.
WarmZilla is a UK heating and energy services company that installs and replaces home boilers and related heating equipment. It also installs EV chargers and carries out on-site safety checks and maintenance visits. Customers can get quotes and book installations online, with finance options available. WarmZilla uses trained field engineers and provides written safety and service paperwork after the job is finished.