Boiler Replacement in Finchley
When repair is no longer the sensible option, a modern boiler replacement transforms your home's comfort and efficiency. As accredited Viessmann and Vaillant installers, we specify and fit the right system for your property — not the cheapest unit on the shelf.
Every installation is Gas Safe notified, benchmarked, and registered with the manufacturer for full warranty protection.
When Replacement Makes Sense
Replacing a boiler is a considered decision. These are the indicators we look for when advising Finchley homeowners on whether to repair or replace.
Age Beyond 12–15 Years
Boilers manufactured before 2010 lack modern condensing technology. Even if yours still fires, it may be operating at 70–80% efficiency — meaning up to 30p of every pound you spend on gas is wasted through the flue.
Increasing Repair Frequency
If you've called an engineer more than twice in the past eighteen months, the cumulative repair costs are likely approaching the threshold where replacement becomes the more prudent investment.
Inconsistent Heating or Hot Water
Rooms that never quite reach temperature, hot water that fluctuates, or radiators with persistent cold spots despite bleeding — these often indicate a boiler that can no longer modulate effectively.
Rising Energy Bills
A noticeable year-on-year increase in gas consumption, despite no change in usage habits, typically points to declining boiler efficiency. Modern A-rated boilers achieve 92–94% efficiency.
Visible Corrosion or Leaks
Any sign of water staining, corrosion on the casing, or damp patches beneath the boiler warrants immediate assessment. Internal corrosion compromises both safety and reliability.
Obsolete Parts
When your engineer reports that replacement components are discontinued or require extended lead times, the boiler has reached end-of-life. Continued operation becomes a reliability gamble.
The Case for a Modern Boiler
Today's condensing boilers recover heat from exhaust gases that older models simply vented outdoors. The result is a step change in both comfort and economy.
92–94% Efficiency
Modern condensing boilers convert over 90p of every pound spent on gas into usable heat, compared with 70–80p for older non-condensing models.
Smart Controls
Weather compensation, room-by-room zoning, and smartphone connectivity allow precise control over your heating — reducing waste and maximising comfort.
Extended Reliability
Premium brands like Viessmann and Vaillant are engineered for 15–20 years of reliable service, backed by comprehensive manufacturer warranties when fitted by an accredited installer.
Quieter Operation
Modern boilers run significantly quieter than their predecessors. If your current boiler announces itself every time it fires, you'll notice the difference immediately.
Brands We Recommend & Install
We install what we'd fit in our own homes. Our accreditations with Viessmann and Vaillant reflect years of specialist training and proven installation quality.
Viessmann
Over a century of German engineering excellence. Viessmann's stainless steel Inox-Radial heat exchangers outlast copper alternatives, and their Vitodens range consistently achieves the highest efficiency ratings in independent testing.
Hilton is a Viessmann Registered Installer
Viessmann specialist page
Vaillant
The UK's best-selling boiler brand, manufactured in Derbyshire. Vaillant's ecoTEC range has earned its reputation through decades of reliable performance, and their UK production means faster parts availability than any imported alternative.
Hilton is a Vaillant Platinum Certified Engineer
Vaillant specialist pageThe Replacement Process
From initial survey to final handover, every step is structured to ensure your new boiler is specified correctly, installed properly, and warranted fully.
Home Survey
We visit your property to assess the existing installation, measure heat loss requirements, evaluate pipework and flue routes, and understand your household's hot water demand. This typically takes 45–60 minutes.
Detailed Quotation
You receive a comprehensive written quote covering the recommended boiler, all materials, labour, and any ancillary work such as system flushing or controls upgrades. No hidden costs, no pressure.
Installation Day
Our engineer arrives at the agreed time, protects your floors and surrounding area, removes the old boiler, and installs the new system. Most straightforward replacements are completed within a single day.
Commissioning & Testing
Every installation is commissioned to the manufacturer's exact specifications. We perform full combustion analysis, system pressure tests, and verify all safety devices. The boiler is benchmarked and registered.
Handover & Registration
We walk you through the controls, set your preferred temperatures, register the warranty with the manufacturer, complete Gas Safe notification, and update your Benchmark logbook.
What to Expect on Installation Day
Your engineer arrives at the agreed time — we don't do vague “morning” or “afternoon” windows. Dust sheets go down first, protecting your floors, walls, and any surrounding furniture.
The old boiler is carefully disconnected and removed. If a system flush has been specified (recommended for any system over five years old), this is carried out before the new boiler connects, ensuring clean water circulates from day one.
The new boiler is mounted, connected to gas, water, and electrical supplies, and the flue is routed and sealed. Once physically installed, the commissioning process begins — gas rate checks, combustion analysis with a calibrated flue gas analyser, system pressure tests, and verification of all safety interlocks.
Before we leave, we walk you through the controls, set your preferred temperatures, and ensure you're comfortable operating the new system. All packaging and the old boiler are taken away, and the work area is left clean.
Replacement FAQ
Common questions from Finchley homeowners considering a new boiler installation.
How long does a boiler replacement take?
A straightforward like-for-like replacement is typically completed in one day. If the boiler is being relocated, the flue route is changing, or the system requires a full flush, it may extend to two days. We confirm the timeline during your survey.
Do I need to be home during installation?
Yes, we require someone over 18 to be present throughout. This ensures we can discuss any decisions that arise and demonstrate the new system during handover.
Will I have heating and hot water on installation day?
For most single-day installations, your new boiler will be fully operational by the end of the working day. We always aim to leave you with heating and hot water before we depart.
What happens to my old boiler?
We remove and responsibly dispose of your old boiler as part of the installation. This includes safe disconnection of gas, water, and electrical connections, and proper disposal in compliance with waste regulations.
How do warranties work?
Warranty duration depends on the manufacturer and model selected. Viessmann and Vaillant both offer extended warranties when installed by an accredited engineer — which Hilton is for both brands. We handle all warranty registration on your behalf.
Can you relocate my boiler to a different room?
Yes, though relocation involves additional pipework, flue routing, and potentially electrical work. We assess feasibility during the survey and include all requirements in your quotation.
Do you offer finance or payment plans?
We don't currently offer finance directly. However, we can discuss payment arrangements for larger installations. Your quotation is always provided upfront with no obligation.
Considering a New Boiler?
Arrange a no-obligation home survey with a Viessmann and Vaillant accredited engineer