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Endorsed by Which?
AOS Energy Efficient Heating Systems Limited
Opening Hours
Today - 08:00–17:00
- Monday 08:00–17:00
- Tuesday 08:00–17:00
- Wednesday 08:00–17:00
- Thursday 08:00–17:00
- Friday 08:00–17:00
- Saturday - Closed
- Sunday - Closed
What is a Which? Trusted Traders Hertfordshire Trading Standards Approved Endorsement?
Which? Trusted Traders has partnered with Hertfordshire Trading Standards to create a Hertfordshire Trading Standards Approved endorsement. In addition to our standard trading standards assessment, this trader has had a DBS check and is subject to a Trading Standards intelligence check
About
AOS Heating has been one of the industry's leading experts in the Heating & Boiler industry for over 36 years.
Established in 1984, AOS are family run business who is proud of the reputation we have accomplished over the years.
AOS are a trusted company due to our outstanding customer service record, not only do we provide an honest, reliable service we also offer first class central heating, electrical & plumbing services for all.
Whether you need repairs or servicing to an existing heating system or you are interested in a completely new central heating installation we'll make sure you get the best results.
What's more AOS are also specialists in the most up-to-date heating advancements, including renewable & green technologies such as the latest energy efficient boilers and air source heat pumps. Whatever the job, you can rest assured that you are in expert hands.
What we do
Plumbers
- Emergency plumbing services
- Unvented cylinder installation and maintenance
Boiler, central heating and gas engineers
- Boiler installation
- Boiler repair
- Boiler servicing
- Radiators and central heating
- Gas safety testing and inspection
Renewable energy
- Air source heat pumps
My work
Customer reviews
Why you can trust these reviews
All reviews are verified as being genuine and a true customer of this trader.
How can we be so sure?
100% of the reviews we publish have been through our stringent moderation process.
4.9
254 reviews
Recommended
Recommended
by 99% of customers
Sort by
Smooth, hassle free immersion installation
Customer Service
Quality
Value
Been with AOS since 2007, boiler servicing, advice and care always good - nearly always send the same guys so seem like a good company. Jack a regular for this and always polite and helpful. This time my immersion sprung a leak. Jack diagnosed the problem and within days this had been organised by the admin team, quoted for, sorted and repaired. Neat and immaculately tidy - even knowledgeably replaced the flooring under the boiler as part of the price so as not to delay work. Asked me to review and if happy at every step - couldn’t be better. Reece is a new member and will clearly be an asset. Both he and his colleague (sorry he did introduce himself but I can’t remember!) worked through lunch from early morning and stayed until late to get everything just perfect. Next day a minor problem was rectified by a future engineer who had liaised with the fitters and solved it promptly, asking if I was happy with all before getting me to check. All in all a really good experience. One minor issue - received an invoice, then 3 follow up calls to pay within 48 hours. When you have had one working day disrupted by work then kind of hassled this seemed a bit ‘off’. In the end I paid within 4 days but it was irritating. Although the bill was ok to be fair for the excellent job done. All in all thanks AOS - recommend!
Customer in Hertfordshire
, work completed
Recommended
Great work installing air source heat pump
Customer Service
Quality
Value
AOS installed an air source heat pump and mains pressure hot water cylinder for us, which took 5 days. The installers worked very hard to get the complex system up and running as quickly as possible, but were meticulous and took the time to totally re-plumb the airing cupboard to make all the components fit neatly in there ! They were very today, put dustsheets down to protect the floor and swept up all their mess each day before they left. I have to say they provided the best experience I have ever had of plumbing work.
Customer in Cambridgeshire
, work completed
Recommended
Very professional
Customer Service
Quality
Value
Job completed on time. Team were very professional. There were a couple of leaks which were sorted very quickly including one which we discovered on the Sunday following installation. Apart from that we were very pleased that we chose AOS for the installation of our heat pump system and would highly recommend them.
Customer in Cambridgeshire
, work completed
Recommended
AOS Mitsubishi air source heat pump sale/installation review.
Customer Service
Quality
Value
Our friends recommended AOS, they were very happy with the installation, product & performance. The sales team took time to explain the operation, costs, options & installation process, they answered all of our questions. Installation took place 4 weeks after placing the order, installation took 3 days, 1 of these days was installing new radiators. The heating engineers were professional & hardworking. We are very pleased with the quality of the installation, the plumbing & electrical wiring is very neat. Any mess was cleaned up as they went. We cannot comment on the operation of the central heating as the weather has been mild. The air source heat pump heats the water from 3:00 to 6:00am, there is plenty of hot water for 2 and the temperature is fine. The air source heat pump is positioned outside our kitchen window you can just hear the fan with the window open, we don’t expect any issues with noise. There is no vibration when operating. We have no hesitation in recommending AOS, they are a professional operation marketing a superior product.
Customer in Hertfordshire
, work completed
Recommended
Very poor service
Customer Service
Quality
Value
Failed to inform me that one one of my rental properties had a dangerous unvented cylinder. Failed to perform a single annual service/safety check in 6 years. Never sent me a single service report detailing what they had done. Very poor communication and on top of that very rude staff.
Customer in Hertfordshire
, work completed
Annual service review
Customer Service
Quality
Value
The engineer arrived on time. He was efficient, effective and very personable. The work was carried out quickly and efficiently with minimal interaction. Social distancing was observed throughout. He noted and reported a minor issue and I have been advised by the controller that this will be resolved next time they have an engineer in the area. I have been pleased with the system since it was installed and can not fault their service.
Customer in Central Bedfordshire
, work completed
Recommended
Professional job
Customer Service
Quality
Value
The communication with AOS, the expertise of the engineer and the work of the two installers was excellent. From start to finish, I was so impressed with the service and dedication.
Customer in Hertfordshire
, work completed
Recommended
Installation of new boiler
Customer Service
Quality
Value
EOS installed my new Worcester central heating boiler. They arrived on time for the job and made sure protection for our carpets was in place before they started work. The job was completed within the time frame they said and left our clean and tidy. The installer from EOS seemed to really know his business and I was very impressed with his knowledge. I have used EOS for my boiler servicing and central heating maintenance for several years and have always been pleased with their work. I received several estimates for my boiler replacement but overall EOS worked out the cheapest, and hopefully the best.
Customer in Greater London
, work completed
Recommended
Work delivered as promised, on time, excellent quality.
Customer Service
Quality
Value
Installation of an air-source heat pump, and all the equipment to create a new system for delivering central heating via existing radiators and hot water via existing tank. Delivered on time and no new costs incurred. three days work that was inevitably a huge intrusion, done with courtesy and consideration, and leaving the house clean and tidy. The initial marketing via a public presentation was highly professional. The survey and negotiation of contract was thorough and enabled us to take this seemingly large step with confidence, but I would say that the large amount of documentation (some 100 pages in all) delivered by email attachment was difficult to study and handle, as it seemed designed for study on paper instead of on the screen. ie it was on A4 portrait pages, not the layout of a computer screen. Help in applying for the Domestic Renewable Heat Incentive (RHI) was excellent. As it is July, we will not be able to evaluate the performance of the heating system for 3-4 months.
Customer
, work completed
Recommended
Very professional installation
Customer Service
Quality
Value
AOS have been extremely professional throughout this conversion from gas central heating to air source heat pump. We were visited by a very helpful and knowledgeable site surveyor, then went through five iterations of the proposal until it exactly met our requirements. We were delayed due to separate work on our solar panels but AOS were extremely patient, then when we were all ready to go Covid hit and everything went on hold. AOS scheduled us in as soon as possible after lockdown lifted and last week did a very professional, neat, and tidy Job, as much as you can be when you’re changing all radiators, lifting floors, drilling through walls and chasing into plaster. They cleaned up after themselves every night and took away all rubbish and old equipment. The staff on site were experienced, polite and careful of our home and belongings. We’ve already recommended them to one set of friends who want to make the same changes that we have.
Tony
, work completed
Recommended