About Walsh & Son
Renewables
We are a dedicated team of specialist renewable heating engineers, driven by a passion for efficiency, comfort, and the future of domestic heating.
Our Story
Walsh & Son Renewables was built on a foundation of traditional plumbing and heating expertise, combined with a forward-looking commitment to renewable energy. We realized early on that the future of heating in the UK is low-temperature and electric.
Today, we specialize exclusively in heat pumps, low-temperature heating design, and high-efficiency systems. We don't just fit boxes to walls; we engineer complete comfort solutions tailored to your property.
Heat Geek Certified
Trained to the highest standards in the industry for heat pump design.
Quality Assured
Members of the Guild of Master Heat Engineers.
Our Heating & Renewable Energy Expertise
From traditional heating and plumbing to the latest renewable technology, Walsh & Son Renewables deliver complete, efficiency-first solutions for homes and businesses across South London, Surrey and Kent.
Heat Pumps
Air source and ground source heat pump installation, designed around your property's heat loss for maximum efficiency and comfort.
Low-Temperature Heating
Underfloor heating, correctly sized radiators and hydraulic balancing (TBOE) engineered to run efficiently with heat pumps.
Heating & Hot Water
Modern boilers, unvented hot water cylinders and complete heating systems designed for long-term performance.
Air Conditioning
F-Gas certified installation of efficient air conditioning systems for year-round comfort and cooling.
Gas Services
Gas Safe registered domestic and commercial gas work, including boiler installation, servicing and safety certificates.
Plumbing & Drainage
APHC registered plumbers covering general plumbing, water mains upgrades, drainage and external groundworks.
An Efficiency-First Approach
We believe a heating system is only as good as its design. Before any installation, we carry out a full property survey, detailed heat loss calculations and a careful assessment of your existing heating setup and hot water needs.
This means every system we install — whether a heat pump, boiler or air conditioning unit — is correctly sized, properly balanced and built to deliver genuine comfort and lower running costs for years to come. It's an honest, engineering-led approach that puts long-term performance first.
- Designed around each individual property
- Honest, transparent advice with no hard selling
- Professional workmanship on every project
- Domestic and commercial capability
Why Customers Choose Walsh & Son
Specialist Knowledge
Decades of combined experience across heating, plumbing and renewable technology.
Recognised Accreditations
Heat Geek certified, Gas Safe, F-Gas, APHC, CIPHE and the Guild of Master Heat Engineers.
Long-Term Comfort
Systems engineered for reliability, efficiency and comfort — not just a quick install.
Local & Trusted
A family-run business serving South London, Surrey, Kent and Greater London.
Areas We Serve
Based in South London, Walsh & Son Renewables provide heat pump, heating, gas, plumbing and air conditioning services across the following areas and their surroundings.
Meet the Founder
Michael Walsh
With over 30 years of industry experience, Michael Walsh founded Walsh & Son Ltd with a simple vision — to provide homeowners and businesses with heating and renewable energy solutions that are designed properly, installed correctly and built to last.
Over the years, Michael has built a reputation for delivering high-quality workmanship, honest advice and energy-efficient systems that genuinely improve comfort, performance and long-term running costs. His passion for innovation and renewable technology has helped position Walsh & Son as a trusted specialist in heat pumps, low-temperature heating and modern heating system design.
Today, Michael leads a team of highly skilled engineers and specialists who share the same commitment to quality, professionalism and customer satisfaction.
Qualifications & Expertise
- Renewable Heating & Air Source Heat Pump Specialist
- Heat Geek Certified Installer
- Gas Safe Registered – Domestic & Commercial
- F-Gas Certified Air Conditioning Specialist
- APHC Registered Plumber
- CIPHE Member
- Low-Temperature Heating Design Specialist
- Heating System Design & Installation Expert
At Walsh & Son Renewables, we believe every property deserves a heating system that is efficient, reliable and future-ready. By combining traditional engineering knowledge with the latest renewable technologies, Michael and his team help clients reduce energy consumption, lower carbon emissions and create more comfortable homes and workplaces.
"Efficiency First isn't just our slogan — it's the principle behind every system we design and install."
Trusted Brands, Accreditations & Partnerships
We partner with the industry's leading manufacturers and hold the highest recognized certifications.