AOS Energy Efficient Heating Systems Limited

A neighbour of mine introduced me to AOS and I began my journey switching from Oil to ASHP. I procrastinated about the switch for some time. AOS were patient and always happy to discuss my concerns around pump placement, noise levels, efficiencies, etc. Eventually, I pulled the trigger and AOS were an absolute pleasure to deal with. Every person I’ve spoken to within the company has been friendly, courteous and professional. The install team were fantastic. As for the ASHP, I needn’t have worried, it’s super quiet, keeps the house toasty and quite frankly, I should’ve switched sooner. It’s so quiet we don’t even know it’s on. Our radiators are now quiet too. If you are on the fence then don’t hesitate like I did, you won’t regret it. ASHP works and AOS Heating are without question a company you can trust to ensure you have a great, smooth and trouble free experience. I cannot recommend them highly enough.

I have been with this company for the past four years. They installed my boiler hassle free and good value for money. Excellent service and AOS have continued to provide after sales support. If any issues arise they always provide prompt efficient service. First rate company who I cannot fault in any way.

I wanted to replace a boiler with an air source heat pump system. I sought several quotes and weighed up the balance of quality and cost before ultimately going with AOS. This involved installing an Ecodan heat pump, new radiators, a pressurised hot water cylinder, and also replacing a huge amount of the plumbing. I could not be happier with the decision. AOS' engineers (including Lee Wildego) were all excellent, as were the team online (including Charlotte Owen). They were thoughtful and kind, and never patronising about questions. They were thorough and careful. They accommodated a variety of requests wherever they could manage it (including removing a heavy item from the loft and installing a new shower). When the work was done, they left the house in excellent condition. They arranged a follow up check at around a month, which was also excellent. Appropriate covid measures were followed where required. The experience from start to finish was reassuring and highly competent. I would not hesitate for a moment to recommend all members of this team.

Everything about the project to replace my old back boiler was excellent. Lee talked us through how we might execute the installation where other companies has just shrugged and said it would be difficult. Patiently explored different options ofr location and pipe runs without just opting for the easiest. Fitting team of (Different) Lee and Brad were extremeley professional, did a very neat job of the installation and most importantly were very respectful of our home. The team was also flexible in that we changed one of the rad specs late in the day but they were very accomodating. I started out a little trepidatious about getting a new installation but am now convinced we did the right thing. Could we have got this done cheaper? I dont know but for the care and professionalism I think we got very good value for money.

After seeing my neighbour having AOS Heating to replace his boiler and seeing there workmanship I decided to request a quote. The surveyor was very helpful explaining the different options available. The quote was itemised covering every detail. I agreed the quote and the office staff contacted me for a convenient 2 day slot. Lee and apprentice Sam arrived at 8 am and cracked on removing all the old system having first laid down mats and sheets to protect the stairs and floors, I was amazed how much they got done on the first day. The whole job was completed by the 2nd day afternoon, tested, made good etc. Home was left clean and heating and hot water all working satisfactory. I would thoroughly recommend AOS Heating.

AOS replaced our oil-fired boiler with a heat pump in October 2021. At our request, they also replaced most of the radiators and installed a full set of thermostatic radiator valves. The process from initial discussions to completed installation took nearly four months, but part of this delay was caused by the need to obtain a satisfactory EPC certificate so that we could apply for a government grant. AOS were very good at ensuring that we complied with all the relevant regulatory requirements. This was a complex project but it was carried out very efficiently. Their staff were always courteous and helpful, and during the installation they left the house clean and tidy at the end of each day. We were left with the feeling that this had been a thoroughly professional job. We chose AOS because several of our neighbours had recommended them to us. We would have no hesitation in providing similar recommendations in the future.

We have used AOS for about fifteen years. Recently we had to have the very old water tanks in the loft replaced. Tony and Jack arrived punctually and laid down dust sheets. They worked all day with as little disruption to us as possible. It was good to see Jack, the young man, gaining knowledge and experience, working with Tony, the senior professional. They did an excellent job and left everywhere clean and tidy. All of the staff of AOS that we have encountered over the years have been helpful, efficient and polite. I would not hesitate to recommend the company.

My gas boiler needed replacing following an annual service check by AOS which highlighted a problem necessitating its replacement. The installation was carried out by Tony Owen and Sam and was planned to be completed in one day. They arrived promptly at the scheduled time and carried out the work efficiently and within the timescale. They ensured that my property was protected with dust covers where ever they had to work ensuring that the materials were located without hindrance to me. At the end of their work, Tony explained to me what they had done during the installation, highlighting a small electrical problem which meant a further return visit to resolve at a later date. He went through the documentation he left with me. Sam was very courteous when wishing to use some cleaning facilities to assist him in tidying up before they finished to leave. Altogether, very professional and efficient work carried out by AOS and would highly recommend them.

We used AOS Heating who are based in Cheshunt. We arrived at a quote that we agreed on and which was kept to. The installers arrived when they said they would, 8.00 am, worked all day except for a 20-minute lunch and left between 4.00 and 4.30 pm. They agreed with us what would happen were as new radiators had to be installed as well as the pump, piping and a new immersion tank. They worked cleanly vacuum cleaning at the end of each day. The work was completed on time. The men who came were polite and pleasant company when we chatted to them.

1st classwork from AOS in installing our new gas boiler, Tom, Kian & Jack provided excellent work throughout keeping me informed of everything that was happening as they went. Would definitely recommend AOS for anyone needing a new boiler.