Your boiler is the heart of your home. When it’s working well, you barely notice it. When it starts struggling — or fails completely on a freezing January morning — it suddenly becomes your only concern. Whether your boiler is over 10 years old, increasingly unreliable, or simply guzzling more gas than it should, a new boiler installation could be one of the smartest investments you make in your home this year.
At A S Plumbing & Heating Engineers, we’ve been installing boilers across West Yorkshire for over 30 years. In this guide, we’ll walk you through everything — from understanding the different boiler types to what our installation process looks like on the day.
Why Replace Your Old Boiler?
Many homeowners put off replacing their boiler until it completely breaks down — which is almost always at the worst possible moment. But an ageing boiler isn’t just inconvenient; it costs you money every single month. Modern A-rated condensing boilers operate at over 90% efficiency, while an older boiler may be running as low as 60–70%.
That gap in efficiency can add hundreds of pounds to your annual heating bills. Replacing a G-rated boiler with a new A-rated model can save the average household £300–£400 per year on energy costs — and in today’s energy climate, that matters.
‘A new, energy-efficient boiler doesn’t just give you reliable heat — it starts paying for itself from day one through lower fuel bills.’— A S Plumbing & Heating Engineers, Dewsbury
Types of Boilers — Which Is Right for You?
Choosing the right boiler depends on the size of your home, your hot water demand, and your existing pipework. Here are the three main types our engineers install across West Yorkshire:
Combi Boiler
Heats water on demand — no storage tank needed. Ideal for smaller to medium-sized homes with 1–2 bathrooms. Space-saving and cost-effective.
System Boiler
Works with a hot water cylinder to supply multiple taps and showers simultaneously. Great for families with high hot water demand.
Conventional Boiler
Also known as a heat-only or regular boiler. Works with both a hot water cylinder and cold water storage tank — suits homes with traditional heating systems.
Not sure which type suits your home? Our engineers will assess your property and hot water usage before recommending the most efficient solution. Book a free survey and we’ll advise you with no obligation.
How Much Does Boiler Installation Cost in West Yorkshire?
This is the question we get asked most often — and the honest answer is: it depends. The total cost of a boiler installation in Dewsbury or Wakefield varies based on:
- The type and model of boiler you choose
- Whether it’s a like-for-like swap or a full system conversion
- The location of the boiler (kitchen, airing cupboard, loft)
- Any additional work needed — new pipework, radiator upgrades, or magnetic filter installation
- Whether your existing flue can be reused
As a rough guide, a straightforward combi boiler swap typically costs between £1,800 and £2,500 all-in, including parts, labour, and certification. A more complex system conversion or premium Worcester Bosch model will sit higher. We always provide a fixed, itemised quote upfront — no hidden costs.
We offer finance options and flexible payment plans to spread the cost of your new boiler. Get in touch to find out more about how we can help.
Our Installation Process — Step by Step
We know that having engineers in your home can feel disruptive. That’s why we work cleanly, efficiently, and always leave your home exactly as we found it. Here’s what to expect on installation day:
1. Pre-Installation Survey
One of our Gas Safe registered engineers visits your home to assess your existing system, pipework, and flue. We’ll confirm the boiler model, take accurate measurements, and issue your fixed quote.
2. Removing the Old Boiler
We carefully disconnect and remove your old unit, draining the system as required. Old components are disposed of responsibly in line with UK waste regulations.
3. Installation & System Flush
Your new boiler is fitted, connected to existing pipework, and a full system powerflush is carried out to remove sludge and debris — protecting your new boiler and improving efficiency. We also fit a magnetic system filter as standard.
4. Testing & Sign-Off
Once installed, we commission the boiler, test all controls and radiators, and register your warranty with the manufacturer. You’ll receive a full Gas Safe certificate for your records. We then walk you through how to use your new system.
From start to finish, most installations are completed within a single day. Learn more about our full boiler installation service.
5 Warning Signs You Need a New Boiler Now
Many homeowners wait too long. If you’re experiencing any of the following, it’s time to talk to our team about a replacement rather than another repair:
- Your boiler is over 12–15 years old — efficiency drops significantly with age and parts become harder to source
- Frequent breakdowns — if you’ve called for boiler repairs more than twice in a year, replacement often makes more financial sense
- Rising energy bills — a sudden increase in gas usage without explanation usually points to a failing heat exchanger or poor combustion efficiency
- Uneven heating — if some rooms are warm and others are cold, your boiler may be struggling to maintain pressure
- Yellow or orange flame — your boiler flame should always be a crisp blue. Any other colour is a potential carbon monoxide risk and requires immediate attention from a Gas Safe engineer
Why We Recommend Worcester Bosch
As Worcester Bosch Accredited Installers, we’re proud to offer an industry-leading 10-year guarantee on Worcester Bosch boilers — something that’s only possible through approved installers. Worcester Bosch consistently rank as the UK’s most trusted boiler brand, known for their reliability, efficiency, and availability of parts.
That said, we’re also experienced with leading brands including Vaillant, Baxi, and Ideal. Whatever your budget, we’ll find the right boiler to match your home and your heating needs. Find out more about our boiler brands and guarantees.
How to Choose a Boiler Engineer You Can Trust
In the UK, any engineer working on a gas appliance must be Gas Safe registered by law. Before allowing anyone to install your boiler, always check their Gas Safe ID card or verify their registration at the official Gas Safe Register website. Our registration number is #211549 — you’re welcome to check it.
Beyond Gas Safe registration, look for:
- Manufacturer accreditation (e.g. Worcester Bosch Approved Installer) for extended warranties
- Fixed, itemised written quotes — not vague estimates given over the phone
- Clear after-care and warranty support once the work is complete
- Local reputation — check Google reviews and ask for references
We’ve been serving homeowners and landlords across Dewsbury, Wakefield, Bradford, Halifax, Huddersfield, and Leeds for over three decades. Our reputation is built on honest advice, quality workmanship, and being there when our customers need us most.
Frequently Asked Questions
How long does a boiler installation take?
A standard like-for-like combi boiler swap typically takes 4–6 hours. A more complex system conversion — particularly if we’re moving the boiler location or upgrading from a conventional to a combi system — can take 1–2 days. We’ll give you an accurate timescale during your survey.
Do I need to be at home during the installation?
Yes — someone over 18 needs to be present throughout the installation so we can run you through the new controls at the end and hand over your documentation.
Will I be without heating and hot water all day?
On the day of installation, yes — your heating and hot water will be off while we work. We do everything we can to complete the job in a single visit so your disruption is kept to a minimum.
Is a boiler service different from an installation?
Yes. A boiler service is an annual check of your existing boiler to ensure it’s safe and running efficiently. An installation is the full replacement of your boiler unit. We recommend annual servicing for all boilers — it also protects your warranty.
Do you cover landlord gas safety certificates?
Yes. We provide Gas Safe certificates (CP12s) for landlords across West Yorkshire as part of our comprehensive heating services. These are a legal requirement for all rental properties and must be renewed annually.
What areas do you cover?
We cover the whole of West Yorkshire — including Dewsbury, Wakefield, Bradford, Halifax, Huddersfield, Leeds, and all surrounding towns and villages. If you’re unsure whether we cover your postcode, just give us a call.
Ready for a New Boiler?
Get a free, no-obligation quote from West Yorkshire’s trusted Gas Safe heating engineers. We’ll assess your home and recommend the right boiler at the right price.