Chepstows's Top Heating & Cooling Specialists

AGW Gas Ltd provides trusted, reliable boiler, heating, plumbing, and air conditioning services in Chepstow, Monmouthshire, delivered by experienced local heating engineers.

Boilers

Installations, repairs and maintenance for your home.

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Plumbing

Quick responses and high-quality plumbing work.

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Bathrooms

We can help plan, design and build your dream bathroom.

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Aircon

Air Conditioning installation, repair and maintenance for your home.

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Trusted Boiler Engineers in Chepstow

All heating work is carried out by fully qualified, Gas Safe registered heating engineers, ensuring every installation, repair, and service meets current safety standards. We work with trusted manufacturers and install energy-efficient heating systems, with extended warranties available where applicable.

From boilers and central heating to hot water systems and heating upgrades, AGW Gas Ltd is your local heating engineering specialist in Chepstow.

Boiler Servicing

Need a Boiler Repair Fast?

Boiler breakdown in Chepstow?
Our local Gas Safe registered engineers offer rapid-response boiler repairs across Chepstow and the surrounding area.

We’ll diagnose the problem quickly and get your heating and hot water back up and running as soon as possible.

Comprehensive Heating & Cooling Services in Chepstow

Our heating and cooling services cover everything you need to keep your home or business comfortable and efficient:

  • Expert Boiler installations and upgrades – including extended warranties as Worcester Bosch accredited installers.
  • Boiler servicing and repairs – from annual checks to emergency breakdowns.
  • Central heating – design, installation, and full maintenance.
  • Radiators – replacements, repairs, and MagnaCleanse® system flushing.
  • Smart thermostats
  • Hot water cylinders and unvented systems – safe, professional installations.
  • Gas fires – installation, checks, and servicing.
  • Underfloor heating – discreet, energy-efficient comfort.
  • Full Air con installation, upgrades, repairs and REFCOM-certified servicing

Why Choose AGW Gas in Chepstow?

AGW Gas Ltd is a family-run business with strong local roots. All our engineers are fully qualified, insured, and known for their professional, reliable service. With £2 million public liability insurance and a guarantee on every job, you’ll have complete peace of mind when choosing us.

When you work with AGW Gas Ltd, you benefit from:

  • Gas Safe registered engineers for all heating and gas work.
  • REFCOM-certified specialists in air conditioning.
  • Worcester Bosch Accredited Installers for the latest energy-efficient systems.
  • Clear, honest pricing with no hidden extras.
  • Fully insured work, backed by our guarantees.
  • Excellent reviews and reputation on Which? Trusted Traders.
AGW Gas Ltd, Portishead
Gas Engineer

Working With Trusted Brands

We only install and maintain systems from leading manufacturers such as Worcester Bosch and Vaillant. That means:

  • Modern, quiet, energy-saving technology.
  • Lower running costs.
  • Proven reliability.
  • Extended manufacturer warranties.

Get a Fixed Quote in Minutes Planning a new installation? Use our online tool to get a boiler installation quote tailored to your home in Chepstow. No hidden costs, just clear, honest pricing.

“AGW Gas Ltd installed our new boiler in Chepstow and the service was excellent from start to finish. The engineer arrived on time, explained everything clearly, and left the house spotless. We wouldn’t hesitate to recommend them.”
— Sarah M., Chepstow

 

“We had no heating and hot water at our home in Caldicot and AGW Gas responded quickly. The engineer diagnosed the fault straight away and had everything working the same day. Reliable, professional, and very knowledgeable.” — Mark T., Caldicot
“AGW Gas serviced our boiler in Sedbury and carried out a small repair at the same time. Friendly engineers, fair pricing, and great local service. It’s reassuring to use a company that really knows the area.” — Helen R., Sedbury

Where We Work in Chepstow

We provide heating and boiler services across Chepstow and the surrounding areas. From the historic town centre near Chepstow Castle to the newer residential developments in Bulwark and Sedbury, our local engineers regularly work throughout the area.

We also cover nearby locations including:

  • Tutshill
  • Caldicot
  • Thornwell
  • Hardwick
  • Portskewett
  • The wider NP16 postcode area

 

If you’re based in or around Chepstow and unsure whether we cover your location, just get in touch – chances are we already work nearby.

Request a call back

We will only use the details you provide to us about you or your company directly in connection with the services we provide to you.

Frequently Asked Questions

Yes – we offer a quick-response breakdown service across NP16 and surrounding areas.

Most new boilers are fitted within one to two days.

Yes – we’ll safely dispose of your old system and leave your property tidy.

Yes – as accredited installers, we can also offer extended manufacturer guarantees.

  • An indoor unit (mounted high on a wall inside your home) removes warm air and replaces it with cooled or heated air.
  • An outdoor unit (fitted to a wall, roof, or balcony) releases warm air outside and brings in fresh air to be cooled or heated.

The system runs quietly and discreetly in the background, keeping your home comfortable.

We recommend booking an annual service for both your boiler and air conditioning system. Regular servicing is essential to:

  • Maintain efficiency – helping your systems run smoothly and keep energy bills down.
  • Ensure safety – especially for boilers, where Gas Safe checks can detect carbon monoxide risks or leaks.
  • Prevent breakdowns – early detection of minor issues reduces the risk of costly repairs.
  • Extend lifespan – well-maintained systems last longer and perform better.
  • Protect warranties – many manufacturers require annual servicing to keep guarantees valid.

In Chepstow’s varied climate, where heating is vital in winter and cooling is increasingly useful in summer, an annual service gives peace of mind that your home will stay comfortable all year round.

Yes – most modern systems provide both functions, making them a great year-round solution

Absolutely – all quotes are free, clear, and without obligation.

Wall-mounted split systems are ideal for bedrooms or conservatories, while multi-split units work well for larger homes and offices.

Yes – all our work is backed by our guarantee, along with extended warranties on new Worcester Bosch systems.

Yes, our team includes expert plumbers who handle everything from leaking taps to full bathroom installations.

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