Boilers

Fitted, fixed and serviced properly.

Combi swaps and new installs, plus repairs, annual services and landlord gas safety certificates, from Gas Safe registered engineers.

  • Quote Before work starts
  • Fast Repair response
  • Gas Safe Registered engineers
Newly fitted combi boiler with tidy copper pipework

Vetted, certified, accountable.

Before you book

Boiler questions worth asking before you sign.

The questions every Cardiff homeowner asks us before signing a quote, answered straight.

Repair vs replace?

If parts are available and the boiler is otherwise sound, repair may be the right call. If reliability, safety or repeated breakdowns are becoming an issue, we'll quote replacement honestly.

Combi vs system vs regular?

Combi suits most 1–3 bed homes (no tank, instant hot water). System or regular is for higher-demand homes: multiple bathrooms running at once, or where pressure is too low for a combi.

What does the 10-year warranty cover?

Manufacturer warranties vary by boiler, installer status and service history. We will confirm the exact warranty in writing before you commit.

How big a boiler do I need?

Bigger is not always better. The right size depends on hot-water demand, property size, insulation, flow rate and the existing system.

Boilers

Need a boiler quote?

Combi swaps and new installs, plus repairs, annual services and landlord gas safety certificates, from Gas Safe registered engineers.

Quote
Before work starts
Fast
Repair response
Gas Safe
Registered engineers
Every service we cover

Every boiler service we cover.

From a £20 cartridge fix on the bypass valve to a full system upgrade with a new cylinder.

Honest, indicative prices.

Exact price depends on access, parts, boiler model and whether the system needs extra work.

Combi swap

Quoted

Like-for-like or upgraded install

  • Boiler options explained before you choose
  • Magnetic system filter included
  • Smart wireless thermostat
  • Manufacturer warranty confirmed in writing
Get a written quote →
Most picked

Boiler service

Quoted

Annual service or warranty cover

  • Full strip and clean
  • Combustion analysis report
  • Gas tightness + flue test
  • Service record stamped + emailed
  • Reminder pre-booked for next year
Get a written quote →

Repair callout

Quoted

Fast response where available

  • Diagnostic on first hour
  • Common boiler faults diagnosed clearly
  • Fixed quote before any further work
  • 12-month workmanship warranty
Get a written quote →
What customers say
★★★★★
Request a boiler service and gas safety certificate for a property that I was going to rent. Nigel's depth of knowledge was excellent.
Rory Bamford Cardiff · Verified Google review
How we work

Four steps. No surprises.

The same process for a small repair and a major install. Predictable, written down, never improvised on the doorstep.

Job photos and a postcode coming in by message
Phone / WhatsApp
01

Call or message us

Phone, WhatsApp or web chat. We aim to reply inside the hour during the day, and overnight messages are answered first thing.

An itemised quote being written out
Written quote
02

Free, honest quote

Clear pricing before work starts. Smaller jobs can often be priced from photos; bigger jobs get a written quote after a proper look.

Newly fitted combi boiler with tidy copper pipework
Install in progress
03

Job done right

Tidy work, the house left as we found it, the old kit taken away. Itemised invoice, full guarantee.

Boiler controls set up at handover
Aftercare
04

Aftercare

Annual service reminders. A real number to call if anything's not right. We don't disappear after the invoice.

Common questions

Boiler questions, honestly answered.

How long does a boiler installation take?

A like-for-like combi swap is usually a single working day. System or regular boiler upgrades, or installs that need the flue rerouted, take one to two days. Back-boiler removals add half a day for the chimney sweep and asbestos check. We'll give you a firm timeline at quote stage so you can plan around it.

Which boiler brand should I pick?

PHBLUE's existing site says we service and repair all major boiler makes and models, including Worcester Bosch, Vaillant, Ideal and Baxi. The right brand depends on the house, budget, warranty and parts availability, so we confirm the recommendation in the quote.

What's included in a fixed-price boiler quote?

A written boiler quote should set out the boiler, flue work, controls, any filter or system-cleaning work, warranty position, registration requirements and removal of the old unit where included. We confirm the exact scope before work starts.

How much should a new boiler cost in 2026?

Boiler prices depend on the model, flue route, controls, system condition, access and whether extra pipework or cleaning is needed. Send the boiler details and postcode and we will confirm the price before work starts.

Will you remove the old boiler?

Yes, every install includes removal and recycling of the old unit, packaging take-away, and a full clean-down before we leave. You'll get the warranty paperwork and the Gas Safety Certificate handed to you on the day.

Do you service boilers you didn't install?

Yes. The existing PHBLUE site says we service and repair all boiler makes and models, including Worcester Bosch, Vaillant, Ideal, Baxi and more.

Do you charge a call-out fee?

No, not for any job we go on to quote or carry out. Diagnostic visits where we don't end up doing work are charged at our standard hourly rate (£90 first hour, £55 after) and we'll always tell you that up front.

Are quotes fixed price or estimates?

Fixed-price for everything we can survey: boiler installs, bathrooms, EV chargers, EICRs, central heating refurbs, heat pumps. Variable-rate for diagnostic and repair work, but with hourly rates published on every relevant page so you know before we start.

Can you take a deposit and stage payments?

For jobs over £3,000 we take a 30% deposit at scheduling, 50% on day one, balance on completion. That covers our materials outlay without exposing you. Smaller jobs are paid on completion. We accept bank transfer, card, and Apple/Google Pay; no cash in hand.

Do you offer finance?

Not directly: we're not authorised to broker credit. For boiler installs, Worcester Bosch and Vaillant both run their own finance schemes (0% over 12 months on installs through accredited installers like us). Ask at quote stage and we'll send you the application link.

Do you give written quotes?

Always. Every job over £200 gets a written, itemised, fixed-price quote before any work starts. The quote is yours to keep, valid for 30 days, and the price on it is what you'll pay: line-item breakdown for materials, labour, and any provisional sums.

How quickly can you come out for an emergency?

For genuine emergencies (gas leak, no heat in winter, burst pipe) we aim to be on site within 60 minutes anywhere in Cardiff and within 90 minutes for Penarth, Barry, and the Vale. Out of hours, your call goes to a triage line that wakes Nigel for true emergencies.

Do you charge a call-out fee?

No call-out fee for jobs we go on to quote. Diagnostic visits where we don't carry out work are charged at our standard hourly rate, which we'll always tell you about up front.

How does the heat pump grant work?

The Boiler Upgrade Scheme pays toward an air-source heat pump install at one of two rates. If your home currently runs on oil or LPG you get £9,000, an uplift for off-gas-grid homes that runs until 31 March 2027. If you're on mains gas it's £7,500. The voucher is applied for through the installer before the work starts, so you never handle the paperwork or the money. The grant is discounted at the point of sale.

Are you Gas Safe registered?

Yes, every gas engineer who works under PHBLUE is Gas Safe registered. You'll see our registration number on every quote, every invoice, and every Gas Safety Certificate. You can also verify us directly on the Gas Safe Register's public lookup.

What areas do you cover?

Cardiff and the surrounding South Wales region, primarily Cardiff, Penarth, Barry, Caerphilly, Llandough, Roath, Rhiwbina, Whitchurch, and Cowbridge. If you're nearby and we don't cover your postcode yet, drop us a message and we'll see what we can do.

Boiler quote

Need a boiler quote?

We look at the job properly, put the quote in writing, and tell you honestly whether you actually need a new boiler.

  • Same working day reply
  • Clear pricing before work starts
  • Gas Safe · NICEIC · Checkatrade
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