Gas & heat

Every heating option, explained honestly.

Gas Safety certificates, landlord checks, heating advice and out-of-hours emergency callbacks. Clear guidance before work starts.

  • Survey Heating advice
  • Out-of-hours Emergency callback
  • Gas Safe Registered work
Newly installed black air source heat pump outside a home

Vetted, certified, accountable.

BUS
Grant route Boiler Upgrade Scheme handled for you
CP12
Gas safety Landlord certificates listed
Two paths, no pressure

Gas, renewables, or both: your choice.

We don't push a solution before the house has been looked at. Gas, renewables or repair work all need the right diagnosis first.

Sticking with gas?

Most Cardiff homes still run on gas. PHBLUE's existing site lists gas work, boiler installs, repairs, servicing and gas safety certificates.

See boiler options →

Switching to a heat pump?

Heat pumps need proper survey, design and certification. We can discuss whether your home is suitable and confirm the current grant and installer requirements before quoting.

Heat pumps explained →

Landlord obligations (CP12)

Privately-let homes with gas appliances need a Landlord Gas Safety Record annually. We can book single visits or discuss portfolio requirements.

CP12 details →

What's a heat pump like to live with?

A heat pump is designed around lower flow temperatures, outdoor unit position, hot-water needs and radiator sizing. The survey matters more than a headline claim.

How they work →
Gas & heat

Gas, heating or emergency help?

Gas Safety certificates, landlord checks, heating advice and out-of-hours emergency callbacks. Clear guidance before work starts.

Survey
Heating advice
Out-of-hours
Emergency callback
Gas Safe
Registered work
Heating upgrade advice

Considering a heat pump? Start with the honest version.

Heat pumps can be a good fit for the right house, but they need proper survey, heat-loss calculation, radiator checks and current grant eligibility confirmed before anyone quotes.

Heat pumps, explained →
Survey

first, quote second

  • Check the current grant rules
  • Assess radiators and hot-water needs
  • Confirm certification requirements
  • Quote only after the house has been assessed
Book a free survey →
What customers say
★★★★★
We had a boiler pressure issue leaving us with no hot water or heat. Arrived within the hour and fixed. Reasonable after hours call out rate and very friendly.
Beth Barnham 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.

Testing a gas meter with a manometer
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.

Air source heat pump commissioned
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

Gas, heat & grant questions.

Does the BUS grant come off the price upfront?

Yes. Your voucher is applied for before any work starts, and the grant is deducted from your final invoice. You don't handle paperwork, you don't fund it and claim back. It's £9,000 if you currently heat with oil or LPG and £7,500 on mains gas. The scheme runs to 2028 (extended by DESNZ), but the higher oil/LPG rate ends on 31 March 2027 and slot availability tightens through the year, so apply early if you can.

Will my radiators need replacing?

Sometimes. Heat pumps run at lower flow temperatures (35–55°C versus a gas boiler's 60–75°C), so older single-panel rads in cold rooms may need upsizing to deliver enough heat. We model every radiator at survey and tell you which ones need to change: usually 3–4 in a 4-bed house, sometimes none in a well-insulated post-2002 build.

Are heat pumps noisy?

Quieter than your fridge. Modern Daikin Altherma and Mitsubishi Ecodan units run at 38–42 dB at 1m, about as loud as a quiet conversation. The unit goes outside on a slab; we measure the boundary noise at survey to confirm Permitted Development sign-off.

Will it actually save me money?

For most Cardiff homes upgrading from a gas boiler, yes: £150–£400 a year on running costs, plus the £7,500 grant on the install. Coming off oil or LPG the case is stronger on both counts — the running-cost gap is wider and the grant is £9,000. Worst-case (poorly insulated home with under-sized rads) is roughly cost-neutral on running but you've still de-fossilised. We'll show you the SAP modelling at survey, not just a glossy sales pitch.

How long does an install take?

3–5 working days on site for a typical 4-bed home, plus a 1-day pre-install survey. We commission and balance the system before we leave; you'll have a smart controller (Mitsubishi MELCloud or similar) walked through with you, and we register your warranty and install certificate on your behalf.

How much does an air source heat pump actually cost?

After the BUS grant, most installs land between £6,000 and £10,000, depending on the property, the size of the system, and what's needed for radiator and pipework upgrades. That's net of the £7,500 mains-gas rate; if you currently heat with oil or LPG the grant is £9,000, so take another £1,500 off. We give you a fixed quote after a free survey.

Will it actually heat my house in winter?

Yes: modern air-source heat pumps work down to about -25°C. The Welsh climate is well within their operating window. They run cooler than a gas boiler (so radiators feel less hot to the touch) but they run for longer, keeping the house at a steady comfortable temperature.

Do I need to replace my radiators?

Sometimes. Heat pumps work best with slightly larger radiators because they run at lower flow temperatures. We'll calculate that during the survey and only swap radiators where it's genuinely needed.

How loud is it?

About as loud as a fridge: roughly 40–45 dB at one metre. Most installs are positioned where the noise is irrelevant.

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.

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.

Survey or quote

Gas, heating or emergency help?

Tell us what is happening and we will confirm the right next step, whether that is a certificate, repair visit or survey.

  • Same working day reply
  • Clear pricing before work starts
  • Gas Safe · NICEIC · Checkatrade
Message Nigel on WhatsApp