Your Boiler Replacement, Made Simple
Get a fixed price quote in 60 seconds. New A-rated boilers installed by Gas Safe engineers, as fast as tomorrow.
Get My Fixed Price Quote
New Boiler Replacement in 3 Easy Steps
No pushy salespeople. No waiting around. Just a warm home, fast.
Step one
Take The Survey
Answer a few simple questions about your home. It only takes a minute and we'll find the perfect boiler for your needs.
Step two
Pick Your Boiler & Pay
Get your fixed price quote instantly. Choose from top brands and pay upfront or spread the cost with 0% APR finance.
Step three
Book Installation
Pick an installation date that suits you. Our Gas Safe registered engineer will arrive and get you warm again.
Ready for Your Fixed Price Quote?
No obligation, no hidden fees. Just an honest price for your boiler replacement. Find out how much you'll pay in the next 60 seconds.
Start My 60-Second SurveyFinance options available at checkout.
Why Replace Your Boiler With WarmZilla?
Fixed Price Guarantee
The price you see is the price you pay. No nasty surprises on installation day.
Next Day Installation
Boiler broken down? We offer emergency boiler replacement to get you back up and running fast.
Gas Safe Engineers
Our entire network of 'Warminstallers' are fully qualified and Gas Safe registered for your peace of mind.
Top UK Boiler Brands
We only install A-rated boilers from leading brands like Worcester Bosch, Ideal, and Vaillant.
0% APR Finance
Spread the cost of your boiler replacement over 12 or 24 months, completely interest-free.
System Cleanse Included
Every installation includes a system cleanse and inhibitor to protect your new boiler and central heating.
Installing the UK's most trusted boiler brands
What Our Customers Say
Over 10,000 happy customers and rated 'Excellent' on Trustpilot.
Ordered a boiler Thursday evening. I was contacted Friday night by the engineer to let me know what time he'd arrive etc. The fitter arrived within the time he had stated and was quick and efficient.
I had a great experience with warmzilla the staff are experience and very efficient the engineer who did the job was great. I think my overall experience was great and we’ll introduce them to anybody to use them.
AbayomiFrom enquiry and conversations with the team, whole process progressed in a straightforward stress free way. Day of fitting, my engineer Jay did a great job and dealt with unexpected issues without any fuss.
DeeFAQ's
The cost of a new boiler depends on the type (combi, system, regular), the brand, and your property's needs. Our online survey gives you an accurate, fixed price quote in 60 seconds, with installation costs typically ranging from £1,800 to £4,000.
We can often install your new boiler the very next day. Simply complete the survey, choose your boiler, and you'll see a live calendar of available installation dates in your area.
A standard "straight swap" (replacing an old combi with a new combi in the same location) usually takes just one day - around 4 to 8 hours. Upgrading an older system with a hot water cylinder to a modern combi boiler, or relocating your boiler, typically takes 1 to 2 days. (And yes, you can still use your toilet while we work! We only need to turn off your main water supply briefly.)
Your WarmZilla quote includes the new A-rated boiler, a Gas Safe engineer to install it, a system filter, a full system cleanse (flush), removal and recycling of your old boiler, and registration for your warranty.
Don't worry if you're not sure! Our smart survey asks the right questions to determine if you need a Combi, System, or Regular boiler. We'll only recommend boilers that are perfect for your home's size and hot water demand.
If your boiler is over 10 years old and a repair quote is creeping over £300, replacing it is usually far more cost-effective. Older boilers are inefficient, meaning a significant portion of your energy bill is wasted. A new A-rated boiler includes a long warranty for peace of mind and uses far less gas to heat your home.
Standard home insurance policies rarely cover boiler replacement due to age or general wear and tear. Insurance typically only covers damage from accidental events like fires or floods. If you have standalone "home emergency" cover, they may contribute toward replacement costs, so it is worth checking your policy details.
There is no ban on gas boilers for existing homes. The government's Future Homes Standard applies strictly to brand-new home builds. If you live in an existing property, you are free to replace your boiler with a new, energy-efficient gas model, and you can continue using it for its entire lifespan.
Under government schemes like ECO4, qualifying low-income households or those receiving specific benefits (such as Universal Credit) may be eligible for a subsidized or free boiler replacement. While WarmZilla specializes in fast, fixed-price installations, we recommend checking GOV.UK to verify your eligibility for grant programs first.