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41 Years
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Emergency
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Expert Plumbing and Heating Services in West Wales
Established in 1985, G G T Thomas & Son has built a reputation as a trusted provider of central heating and plumbing services across West Wales. Our expertise spans domestic, commercial, and industrial sectors, with a focus on complex installations such as underfloor heating, air source heat pumps, and biomass boilers. As REHAU-registered specialists, we deliver tailored solutions that prioritise energy efficiency and cost-effectiveness, supported by a team of fully certified engineers. Our commitment to quality is underscored by rigorous risk assessments, CRB-checked personnel, and a track record of serving high-profile clients including local authorities and healthcare providers. With over 30 years of experience, we combine technical proficiency with a customer-centric approach, offering same-day emergency call-outs and long-term maintenance solutions.

Our engineers expertise in system design and control optimisation ensures clients receive systems that balance performance with budgetary considerations. Operating from Pembrokeshire, we extend our services to Ceredigion and Carmarthenshire while maintaining the flexibility to handle larger projects further afield. Our growth from a three-person team to a 20+ workforce reflects our dedication to excellence, as evidenced by repeat business and referrals from satisfied clients. We prioritise transparency, safety, and adaptability, ensuring minimal disruption to commercial operations during installations. By integrating technical knowledge with practical problem-solving, we aim to deliver heating solutions that meet evolving industry standards and client needs.
Services
Domestic Heating Installation Commercial Plumbing Underfloor Heating Heat Pump Installation System Design Biomass Boiler Services Emergency Repairs Ventilation Systems Industrial Heating Solutions Control System Optimisation
Details
  • Year established: 1985
Highlights and features
  • We have over 30 years of experience in central heating engineering across West Wales.
  • Our engineers are REHAU-registered and certified for gas and oil system installations.
  • We offer same-day emergency call-outs across Pembrokeshire, Ceredigion, and Carmarthenshire.
  • Our team specialises in energy-efficient solutions like air source heat pumps and underfloor heating.
  • CRB-checked engineers ensure safety and trustworthiness for domestic and sensitive commercial projects.
Associations and certifications
  • REHAU
Services
Domestic Heating Installation
We design and install energy-efficient central heating systems for homes, including gas, oil, and renewable energy solutions. Our engineers ensure optimal performance through precise control system setup, reducing energy bills while maintaining comfort. Specialising in underfloor heating and heat pumps, we provide tailored solutions for new builds and refurbishments across West Wales.
Commercial Plumbing
Our team delivers comprehensive plumbing services for commercial and industrial clients, from system design to maintenance. We work with organisations like local councils and healthcare providers, ensuring minimal disruption during installations. With expertise in large-scale projects, we offer cost-saving modifications without compromising system efficiency or safety standards across Pembrokeshire and beyond.
Underfloor Heating
Specialist installation of underfloor heating systems for residential and commercial properties. We integrate advanced control systems to maximise energy efficiency and comfort. Our engineers calculate precise heat requirements, ensuring even distribution and cost-effective operation. This service includes design consultation and installation in new builds or retrofits across West Wales.
Heat Pump Installation
We supply and install air source and ground source heat pumps, optimising renewable energy use for homes and businesses. Our REHAU-certified engineers ensure correct system sizing and control integration, reducing carbon footprints while maintaining heating efficiency. This service includes feasibility assessments and tailored solutions for properties in Pembrokeshire and surrounding areas.
System Design
Our experts create custom heating and ventilation systems for new constructions, focusing on energy efficiency and budget optimisation. We calculate precise heat loads, select appropriate components, and provide detailed plans. This service extends to recommending trusted partners like electricians and architects, ensuring holistic solutions for clients across commercial and domestic sectors in West Wales.
People
Gerald Thomas
Founder
With over 40 years in heating engineering, Gerald established G G T Thomas & Son in 1985. His expertise in complex installations and system design laid the foundation for the company's reputation in West Wales. He prioritises technical excellence and customer satisfaction.
Andrew Thomas
Director
Andrew joined the family business after completing his apprenticeship. With 30+ years of experience, he oversees operations and project management. His focus on innovation and team development has driven the company's growth to a 20+ staff workforce serving commercial and domestic clients.
Questions
What areas do you cover for heating services?
We serve Pembrokeshire, Ceredigion, and Carmarthenshire, with availability for larger projects further afield.
Do you offer emergency heating repairs?
Yes, we provide same-day emergency call-outs across West Wales for urgent heating issues.
Are your engineers certified for renewable energy systems?
Our team are REHAU-registered and certified for gas, oil, and renewable energy installations like heat pumps.
Can you design heating systems for new builds?
Yes, we specialise in designing energy-efficient systems tailored to building specifications and budget requirements.
What accreditations do you hold?
We are REHAU-registered, with CRB-checked engineers and certifications for gas and oil system installations.