AGW Gas Ltd provides trusted, reliable boiler, heating, plumbing, and air conditioning services in Chepstow, Monmouthshire, delivered by experienced local heating engineers.
Air Conditioning installation, repair and maintenance for your home.
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 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.
Our heating and cooling services cover everything you need to keep your home or business comfortable and efficient:
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:


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