A new boiler, fitted properly, in Watford
Gas Safe registered, Viessmann accredited engineers fitting the right boiler for your Watford home. Fixed quote, all major brands, no call-out fee.
Information on this page last reviewed July 2026.
Your local Watford boiler installers
Looking for a new boiler in Watford? Home Comfort Assured are a Watford based heating team, on Granville Road in WD18, fitting high efficiency gas boilers across the town and the surrounding Hertfordshire villages. We cover every Watford postcode, WD17, WD18 and WD19 included.
Fitted properly means the boiler is sized to your home, the system is cleaned before the new unit goes on, the controls are set up so you actually feel the benefit, and everything is tested and left tidy. It is the difference between a boiler that limps along and one that runs quietly and cheaply for years. If you need servicing or a repair rather than a new install, our Watford boiler servicing and repair page covers that.
What a new boiler job with us looks like
No pressure and no jargon, just a clear process from the first call to the day your heating is back on.
1. Survey and advice
We look at your home, your current setup and how you use your heating and hot water, then talk you through the sensible options. Bigger is not always better; the right size boiler runs more efficiently.
2. A fixed written quote
You get a clear, fixed price in writing, with no call-out fee and nothing hidden. If a system upgrade would save you money over time, we will say so, but we never upsell for the sake of it.
3. A tidy, proper install
A Gas Safe registered engineer fits the boiler, cleans the system, sets up the controls and tests everything. We protect your floors and leave the place as we found it.
4. Aftercare and warranty
We register your manufacturer warranty, hand over the paperwork, and back our own work and parts with a one year guarantee. If you need us afterwards, we are local and we answer.
The boilers we install
We install combi, system and regular (heat only) boilers, and we fit all the major brands: Worcester Bosch, Vaillant, Ideal, Baxi and ATAG among them. The best boiler for your home depends on your water pressure, how many bathrooms you run and how you like your heating to work, and that is exactly what the survey is for.
We are Viessmann accredited engineers, so Viessmann is the brand we most often recommend when a customer asks us to choose. That is about efficiency, build quality and the extended warranty route accredited installers can offer, not about pushing one badge. You can read the honest case for Viessmann, and see how it compares with the other brands we fit, on our Viessmann boilers page.
Fitted properly, guaranteed
Why Watford homeowners choose us for a new boiler
A new boiler is a big purchase, and how it is fitted matters as much as which one you buy. Our engineers design the system around your home so it runs efficiently for years, not just so it passes a first fire-up. Andrew Millward, who leads the team, has more than 40 years in the trade and carries the Heat Geek Elitist title.
What you get
- A fixed written quote before any work starts, with no call-out fee
- Gas Safe registered engineers (registration 586325)
- Viessmann accredited, and happy to fit any major brand you prefer
- Your old boiler removed, the system cleaned, and the job left clean and tidy
- A one year guarantee on our work and the parts we supply
A recent Watford install
A Viessmann system that does the thinking for you
This Viessmann Vitodens 200-W system went in on a job here in Watford. It runs weather compensated, with hot water priority and two heating circuits on mixers, so the system feeds heat into the home gradually as the outside temperature changes rather than blasting on and off.
That is the sort of setup that keeps running costs down without you having to think about it. You can see more of our real work in the gallery.
What a new boiler costs in Watford
Every home is different, so we quote on survey rather than quoting blind. As a rough guide, a straightforward combi replacement in the UK typically falls somewhere between £2,000 and £3,500 fitted, while a system boiler with a new cylinder, or a full change of boiler type, usually sits higher. These are typical UK ranges to help you plan, not our price; your fixed quote is confirmed once we have seen the job.
What moves the price is the boiler you choose, whether the pipework and flue need changing, where the boiler is going, and any controls or upgrades you want. Watford is a hard water area, so we will also talk to you about scale protection, which helps a new boiler stay efficient for longer.
Boiler brands we install and service
New boiler questions, answered
How long does a new boiler take to fit in Watford?
A straight combi swap is usually a one day job. A full system change, a move to a different boiler type, or a system boiler with a new cylinder can take two to three days. We give you a realistic timescale with your quote, not a guess on the day.
Do you take the old boiler away?
Yes. We remove your old boiler and any redundant parts, and we leave the space clean and tidy. Removal and safe disposal are included in the quote.
Which boilers do you install?
All the major brands, including Worcester Bosch, Vaillant, Ideal, Baxi and ATAG. We are Viessmann accredited, so Viessmann is the brand we most often recommend when a customer asks, but the choice is always yours and we fit what suits your home and budget.
Do you cover all of Watford?
Yes, every Watford postcode including WD17, WD18 and WD19, plus the surrounding towns. We are Watford based, on Granville Road in WD18, so we are local to you.
Is the quote fixed?
Yes. We survey the job, then give you a fixed written quote with no call-out fee and no hidden extras. The price we quote is the price you pay.
Related pages
More on boilers, Viessmann and the other work we do around Watford and Hertfordshire.
Real, named, qualified
The engineers who turn up
Two engineers, both Gas Safe registered under registration 586325. When you book Home Comfort Assured, this is who does the work.
Andrew Millward
Founder and heating engineer
- 40+ years experience
- Heat Geek Elitist
- Viessmann accredited
Andrew has over 40 years in the trade and specialises in fault finding, boiler and heating repairs, and the design of energy efficient systems like heat pumps and underfloor heating.
Andrew on YouTube
Elis Harizi
Director and plumbing & heating engineer
- Plumbing since 2007
- Heat Geek member
- Gas qualified
Elis trained as a plumber in Greece in 2007, moved to England to gain his gas qualifications, and now designs and installs energy efficient heating as a Heat Geek member.
Ready for a new boiler in Watford?
Call and speak to a Gas Safe registered engineer, or request a fixed quote. We are Watford based and cover WD17, WD18, WD19 and all of Hertfordshire.