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Business Details
47 Years
experience
Expert HVAC Services in Isleworth
Established in 1979, J G Fielder is a family-run heating and plumbing specialist serving West London. With over four decades of experience, we combine traditional craftsmanship with cutting-edge technology to deliver tailored solutions for residential and commercial clients. Our Gas Safe registration and membership with the Institute of Plumbing underscore our commitment to safety and quality. We are certified by industry leaders like Vaillant and Honeywell and approved by Thames Water, ensuring our expertise spans both conventional and innovative systems. From boiler replacements to smart thermostats, our team provides comprehensive installation, maintenance, and consultancy services.

We prioritise energy efficiency, offering solar hot water and underfloor heating systems to reduce environmental impact. Our dedication to customer satisfaction is reflected in our annual service plans and responsive support, ensuring systems operate at peak efficiency year-round. As a trusted local business, we understand the unique needs of our community and strive to exceed expectations through reliability and technical excellence.
Services
System Installation & Upgrades Solar Hot Water Under Floor Heating Boiler Replacement & Service Landlord Safety Checks High Pressure Water Systems Advice & Consultancy
Details
  • Year established: 1979
Highlights and features
  • We have over 40 years of experience in heating and plumbing solutions.
  • Our team is Gas Safe and Institute of Plumbing certified.
  • We are approved by industry leaders like Vaillant and Honeywell.
  • We offer energy-efficient systems including solar and smart technology.
  • Our annual service plans ensure long-term system reliability.
Associations and certifications
  • Gas Safe Register
  • Institute of Plumbing
  • Nest Pro
  • Thames Water
Services
Boiler Replacement & Service
We install and service all boiler types, prioritising energy-efficient condensing models since 1991. Our annual service plans ensure optimal performance and longevity. Regular maintenance prevents breakdowns and maintains warranty validity, providing peace of mind for homeowners and businesses.
Solar Hot Water
Our solar systems supply up to 60% of annual hot water needs, automatically switching to conventional power when needed. This reduces fuel bills and carbon footprints while adding property value. We design installations tailored to household energy consumption patterns.
Under Floor Heating
We offer underfloor heating solutions that combine comfort with modern aesthetics. Our systems integrate with various floor types and provide even heat distribution. This energy-efficient option works seamlessly with renewable energy sources for enhanced sustainability.
Smart Thermostat Installation
We install intelligent room-by-room heating controls that learn user preferences and adjust temperatures automatically. These systems optimise energy use and can be managed remotely via mobile devices, ensuring comfort and efficiency whether at home or away.
Landlord Safety Checks
We conduct annual gas safety inspections required for rental properties, issuing official certificates. Our certified engineers ensure compliance with legal standards, identifying potential hazards and maintaining tenant safety through thorough system evaluations.
Questions
What services does Fielder offer?
We provide boiler installations, underfloor heating, solar hot water systems, smart controls, and annual maintenance plans.
Are Fielder certified for gas work?
Yes, we are Gas Safe registered and certified for both domestic and commercial gas systems.
Do you cover areas outside West London?
Our primary service area is West London, but we can discuss specific requirements for nearby regions.
Can Fielder help with renewable energy systems?
Yes, we install solar hot water systems and advise on integrating renewable technologies into existing heating setups.
What accreditations does Fielder hold?
We are members of the Institute of Plumbing, Nest Pro certified, and approved by Thames Water and Vaillant.