Business Details
42 Years
experience
Emergency
services
Trusted Heating Installers in Hertfordshire
AOS Heating has been a leading expert in the heating and boiler industry for over 38 years, established in 1984 as a family-run business. Our reputation is built on outstanding customer service, offering honest, reliable solutions for central heating, electrical services, and plumbing. We specialise in renewable technologies like air source heat pumps and energy-efficient boilers, with engineers holding Safe Gas accreditation.Our commitment to staff development and customer-first principles ensures top-quality service. We are proud winners of the Renewable Heat Installer and Contractor of the Year 2023 and maintain public liability insurance of 5m. Customer recommendations form a significant portion of our new business, reflecting our dedication to excellence.
Services
Boiler Repair
Boiler Servicing
Central Heating
Powerflushing
Air Source Heat Pumps
Electrical Services
Details
- Year established: 1984
Highlights and features
- 38 years of experience in heating and boiler installations
- 24/7 emergency repair service with rapid response times
- Interest-free financing options available for new boiler installations
- Winner of Renewable Heat Installer and Contractor of the Year 2023
- Public liability insurance of 5 million for customer protection
Associations and certifications
- Gas Safe Register
- Worcester Bosch Accredited Installers
- Ideal Accredited Installers
- RECC (Renewable Energy Consumer Code)
What people say
Polite efficient engineers
15 years loyal customers
Award-winning renewable expertise
Transparent pricing
Prompt emergency response
Services
Boiler Repair
Our Gas Safe registered engineers provide rapid boiler repair services across Hertfordshire and Essex. With same-day availability and 24/7 emergency response, we address gas leaks, water leaks, and system failures. Engineers carry common replacement parts for immediate fixes, with transparent pricing and no excess fees on breakdown cover plans.
Central Heating
We design and install custom central heating systems with full property surveys. Our solutions include energy-efficient boilers, thermostatic radiator valves, and Danfoss controls. All installations come with 5-year warranties, annual service options, and compliance with British Standard 7593 for chemical powerflushing requirements.
Air Source Heat Pumps
Specialist installation of Mitsubishi Electric Ecodan air source heat pumps for off-grid properties. Our MCS-certified engineers handle complete system integration with radiators, hot water cylinders, and thermostatic controls. Systems qualify for Renewable Heat Incentive payments and come with manufacturer warranties.
Powerflushing
Chemical powerflushing removes sludge and debris from heating systems using Sentinel Jet Flush machines. Required for new boiler installations under British Standard 7593, this process improves efficiency by 15-30% and extends system lifespan. Includes magnetic filter installation for ongoing protection.
Electrical Services
NICEIC-registered electricians handle domestic electrical work including fuse box upgrades, lighting installations, and central heating fault diagnostics. Services include periodic testing, emergency repairs, and integration with heating system controls for complete home energy solutions.
Questions
Do you offer emergency boiler repairs?
Yes, we provide 24/7 emergency boiler repair service with engineers available for same-day visits across Hertfordshire and Essex.
What boiler brands do you install?
We specialise in Worcester Bosch and Ideal boilers, with accreditation to offer extended guarantees up to 10 years.
Are your engineers qualified?
All our engineers hold Gas Safe accreditation and receive ongoing training in the latest heating technologies.
Do you cover areas outside Hertfordshire?
Yes, we serve Essex, Buckinghamshire, and North London with the same high standards of service.
Can I spread boiler installation costs?
Yes, we offer interest-free financing options allowing payments over 3-12 months for new boiler installations.
What service plans are available?
We offer four cover plans from £7.50/month, including boiler breakdown, full heating cover, electrical, and drainage protection.
Reviews (6)
Kevin Crooks
Jan 21, 2022
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Update after 2 years: Still one of the best companies I've used, I've had many positive experiences with AOS and highly recommend! After having a few problems with our system, they were extremely easy to contact, diagnosed the problem and fixed for us. AOS is an Excellent company, with great after-sales support. My thanks in particular to Josie in the services dept and to Jack for fixing the problem. Great quality work fitting an air source heat pump for us - they kept us informed and updated through the process, and the installers were very friendly. I'd definitely recommend!
Rishaan Rishaan
Nov 27, 2021
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Just moved into our new property and signed up with AOS for annual boiler service , called them as few of the radiators were not working, Jack came and sorted everything in no time. Brilliant service.
Vishal Khanna
Services:Heating maintenance,Repair heating system
Vishal Khanna
Services:Heating maintenance,Repair heating system
Adrian Hitchcock
Jul 30, 2021
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We had a new heat pump fitted to replace an oil fired system. We are very, very happy with the efficient service that we have received from AOS. In particular, the three young men who were with us for a few days fitting the new system couldn't have been more efficient, tidier, more helpful or more polite - they were fantastic, a real credit to themselves & AOS!
Adrian Walter
Jul 19, 2021
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Positive:Professionalism,Punctuality,Quality,Responsiveness,Value
Excellent service from first enquiry to post installation paperwork. Installation crew were superb - courteous, efficient, tidy and punctual.
Questions were answered quickly and patiently and price was reasonable. All in all, a very positive experience so I can't ask for anything more!
Service:Install heating system
Excellent service from first enquiry to post installation paperwork. Installation crew were superb - courteous, efficient, tidy and punctual.
Questions were answered quickly and patiently and price was reasonable. All in all, a very positive experience so I can't ask for anything more!
Service:Install heating system
Rebecca Kinsley
Jul 14, 2021
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We use AOS for absolutely all of our heating/plumbing needs. We are currently renovating our house, and due to us having to move various radiators, and needing to box in certain pipes, we have found that we sometimes need a heating engineer to make slight adjustments for us, so that the plasterer can do what he needs to do when skimming over boxing etc. We have also had various accidents where we bent our own pipes, or a tradesman went and drilled into a pipe by mistake. The answer? AOS every time. Even when they really can't fit us in, I somehow manage to wangle myself a last minute slot. Honestly
Andy Muir
Jun 08, 2021
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Positive:Professionalism,Punctuality,Quality,Responsiveness,Value
AOS replaced our old ducted warm air heating system with a new Boiler/radiator system. A very tidy job. Engineers and office staff provided an exceptional service. Highly recommended.
Service:Install heating system
AOS replaced our old ducted warm air heating system with a new Boiler/radiator system. A very tidy job. Engineers and office staff provided an exceptional service. Highly recommended.
Service:Install heating system
