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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
237 reviews
Recommended
Recommended
by 99% of customers
Sort by
Super job
Customer Service
Quality
Value
Went with AOS for a heat pump install because the reviews are so good. It has been installed for almost a month now and all is working well. The process from start to finish was made very easy by AOS, right from when I first contacted them for advice and through the various visits and installation stages etc. I asked a lot of technical questions and their responses were always prompt, clear and helpful. Can’t fault them really!
Customer in Cambridgeshire
, work completed
Recommended
Excellent Service from AOS at every step
Customer Service
Quality
Value
We needed to have a new air source heat pump installed as our heating was not working effectively with our old one, not great timing when -8 degrees outside and just before Christmas. AOS were extremely helpful, knowledgeable and professional, from the start of reporting our issues to the really helpful reception service team to the excellent installation engineers and team and follow up care. They were prompt and extremely helpful in our hour of need, I can't fault them, brilliant every step of the way and would thoroughly recommend them. We have a warm house for Christmas and we can't thank them enough.
Customer in Buckinghamshire
, work completed
Recommended
Great service from an excellent company
Customer Service
Quality
Value
We contacted AOS to discuss the installation of an air source heat pump on the recommendation of a friend. Like them we have been delighted with our experience of working with the company. From the initial contact through subsequent surveys, discussion of our needs, liaising with various authorities and the installation of the system AOS were helpful, efficient and professional in their approach. We elected in addition to the heat pump to have a new cylinder and quite a few new radiators so it was a relatively large job but the installation team were exemplary in minimising disruption for us. Throughout the work the installation team were friendly and courteous and did a great job. We are delighted with our new system and would happily recommend AOS to friends and family.
Customer in Cambridgeshire
, work completed
Recommended
A replacement air source system
Customer Service
Quality
Value
The work was carried out to the agreed schedule and on budget. The quotation and handling before the work started was good. I used the same trader to install the air source system 10 years ago and they were responsive and professional to deal with over the ten years. I chose them therefore for their proven record of providing good aftercare. The engineer (and his assistant ) were helpful during the two days of installation. They talked me through the various instructions I needed to know in order for me to be confident to work the system. They were extremely good at tidying up at the finish which was appreciated.
Customer in Hertfordshire
, work completed
Recommended
Really pleased , great company
Customer Service
Quality
Value
Our old boiler has been kept going by AOS but was old and finally gave up. I have the service plan so they came within the hour to have a look. Jack made it safe but told us we needed a new one. They were in touch the next day and the new boiler was installed on the Friday of the same week. Very happy and would recommend them to anyone. I have always been very happy with all their engineers.
Customer in Hertfordshire
, work completed
Recommended
AOS Heating
Customer Service
Quality
Value
AOS saved the day in as far as boiler failed to work Wednesday morning, AOS were on site within 90mins, confirmed boiler not repairable and quote prepared same day. I explained my health restrictions and they arranged for a 3 man team to fit a new boiler and other works on Friday. 48hrs from boiler failure to fitting a replacement and then real patience in explaining the remote control system. Outstanding service.
Customer in Hertfordshire
, work completed
Recommended
Excellent Heat Pump Installation
Customer Service
Quality
Value
AOS installed an air-source heat pump for us in September 2022. We had some outstanding making good and technical issues following the installation which they resolved quickly. The work was done to the agreed schedule and cost and the company also arranged for the application for a government grant to help pay for the work. All the staff from the initial sales visit to the very comprehensive survey, installation and problem resolution, both those visiting our property and those we dealt with on the phone, were excellent. The engineers who came to the house were tidy, respectful of our home, quick and effective in their work. I would have no hesitation recommending this company - in fact, we heard of them from neighbours who all had only positive things to say about AOS.
Customer in Cambridgeshire
, work completed
Recommended
Very Impressed
Customer Service
Quality
Value
The engineers were prompt, did exactly what they said they would do. Extremely helpful and tidied up after themselves. Also very patient with us.
Which? Trusted Traders Consumer
, work completed
Recommended
Stress-free instalation
Customer Service
Quality
Value
We had an Air Source Heat Pump fitted by AOS last week, replacing an oil boiler. Despite our cottage being old with new extensions and therefore slightly out of the ordinary, the installation team, led by Kian, did an amazing job and worked really hard. Kian and Sam were with us all week and were excellent at keeping us informed of progress and explaining what was happening. They, together with Reece and Luca were a pleasure to have in our house. The job was done efficiently and skilfully and they were very focused on ensuring all our needs/queries were met. The whole experience was very positive and we would highly recommend the Company.
Customer in
, work completed
Recommended
On time and professional
Customer Service
Quality
Value
3rd year as a customer with this company. Annual service of Air pump system done today. Engineer was on time, thorough and gave good advice on adjustments to system settings
Customer in Milton Keynes
, work completed
Recommended