AOS Energy Efficient Heating Systems Limited

Called for assistance using our monthly plan with AOS. Great prompt service and Aidan who has visited us before was again excellent

I highly recommend the whole team from AOS for installing an air source heating system in our house. From the information given by Andy and Keith with no high pressure sales . We were given the facts and left to decide. The ladies Lucy and Josie in the office who are so kind and helpful keeping us informed of our government grant application. The team of engineers Rhys, Toby and others who were so polite and friendly. They did a superb job always checking that we were happy and explaining things. Whole system plus radiators and tank installed in 4 days. The system has been in a few weeks now and is working fine. Very happy with it. I like the offer of a free return visit to carry out a health check and to answer any of our questions in the first few months. Brilliant service

We have had an air source heat pump installed by AOS and they have done a great job. A polite team of up to six operatives who were tidy, hard working and professional. The pre-sales service was excellent too with regular communication as to what was going on and when things would happen. Happy to recommend them.

A leaflet through my door from AOS Heating Systems resulted in a presentation on air source heat pumps and their advantages. This led to a 1 to 1 at home assessment. We had a 25 year old oil fired boiler feeding 40 year old radiators and decided now was the time to change. We went for the full system heat pump, new radiators throughout and replacement hot water tank. The installation took 5 days as predicted. The engineers were polite, totally professional arriving on time and cleaned up after themselves each day. There were some issues, the hot water tank, supplied by a sub-contractor was delivered late. However, AOS took complete responsibility. We were kept informed and pragmatic graceful solutions proposed and successfully implemented to keep the plan on track. We are delighted with the result. The heat pump itself is significant quieter (almost silent) than the oil fired boiler and although there is a little more humming from the system, as it is pumping water around the house, it is much quieter than the clicks and groans from the old system. Counter intuitively, the radiators are not as hot, but the house is definitely warmer than before. We have just booked our after sales health check to ensure we are fully familiar with our new system and using it as efficiently and effectively as possible. All in all, as a decerning engineer, I can say this was a major household change, managed really well by a totally professional team. I have no hesitation in recommending them.

Have had good work carried out by AOS for well over 10 years. Air Source Heat Pump ( ASHP) Installed 17 July 2013 replacing oil fired system. Basically AOS Serviced system and the pump failed (wore out) on 23 January 2024 two days later survey carried out to assess what was required and two weeks after that a new ASHP was installed and upgrades on two small radiators. The work took two days and the ASHP was working. We are happy with new pump and pipe work and we were able to keep in touch with engineers at all times the wifi work was completed on the 5th March 2024. Overall costs ASHP pipework, filters, pumps, radiators and disposal of old parts and pumps reasonable (no incentives as we were just replacing the pump unit and we had our government incentive the first time round)

We had our boiler replaced and a system flush and the two engineers were excellent. Nothing was too much trouble and they were really considerate in how they left the house and tidied up after themselves. They even did a few bits that they noticed when they were there and we are really pleased with the final result.

We chose AOS Heating to carry out our new boiler installation as we have used them for many years to service our old boiler and have been very happy with the level of service we have received. We had a technical surveyor come out and do a survey and offer advice regarding the options available to us. The office team were always very efficient and keeping us updated by phone or email. We were provided with very detailed quotes and finance options. The two engineers that installed the boiler were very prompt and polite. They used dust sheets which we were very pleased about as we have cream carpets. They kept us updated throughout the installation. On completion of the work, I was given a full overview of all the workings of the boiler. AOS Heating also have a 24 Emergency phoneline which is very reassuring as a customer. We have been delighted with the service we have received and wouldn't hesitate to recommend AOS Heating to potential customers.

We came to AOS via their Service Department, with which we have enjoyed an excellent relationship for the past two years. In January this year our ageing heat pump, as expected, broke down irretrievably, and it was with great confidence that we turned to AOS for its replacement, together with several, more suitable radiators. The preinstallation survey offered clear and useful advice. The quotation was laid out in logical detail, with diagrams, and once accepted was followed by an excellent description of the relationship both parties had a right to expect. We cannot praise the installation team too highly. Well led, and keen to get the job done properly. Everyone knew what needed to be done, worked with a minimum of fuss, and tidied up at the end of the day. It was good to be involved in discussion about the routing of pipes, the siting of electrical boards, switches and cables etc. We became party to a neat, tidy and uncluttered installation, which anticipates the needs of regular servicing, and has greatly improved the space in the airing cupboard. An art installation in its own right! The only glitch in the process was the late deliver of two radiators, which could not be helped. Expeditious resolution was followed by a clear explanation of the mysteries of the system, together with a series of glossy booklets covering every conceivable need for reference. Both encouraging and easy to follow. Our confidence in AOS fully justified.

I have used AOS for over 18 years for maintenance and repair. I had a problem with my boiler. I called and they were there within a few hours. Unfortunately the boiler was not safe and needed to be replaced. I found the guys very helpful and professional. I would highly recommend AOS.

We have a maintenance contract with AOS and we needed to call on their service to fix a non critical problem = a tall radiator not fixed correctly. The response was excellent and the technician turned up early - not a problem. He could have done a quick fix but instead did a permanent job and did it thoroughly. He kept us informed and showed us what he had done. Very pleased with this.