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Endorsed by

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Trusted Traders

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
Profile thumb aos

4.8

53 Reviews

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 33 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
    • Biomass
    • Solar panels
    • Solar water heating

Customer reviews

Reviews summary

4.8
53 reviews
Customer Service
4.9
Quality
4.9
Value
4.7
Sort by
Professional and helpful performance.
Customer Service
Quality
Value
In installing our Ecodan air pump, hot water cylinder, new radiators, and new pipe work, the team worked effectively and completed the installation in five days as promised. They worked hard, explained what they were doing and answered questions helpfully. This is an entirely new system for us, but we have confidence in it's integrity and value the guarantees for it's performance. We wholly commend the team and the company.
Michael, Cambridgeshire11/06/2018
Vailliant Boiler Service
Customer Service
Quality
Value
I found Sian in the AOS Ltd office very helpful, polite and professional with excellent customer service skills and heating engineer Matt arrived punctually, after a call in advance from Sian, as promised, to let me know the engineer was on his way to me and with an expected arrival time. Matt was very cheerful & professional, despite it being about 80 degrees outside and me advising him that my boiler was located in the loft! My boiler passed its service but Matt happily explained a couple of technical things & seemed very knowledgable about the various packages available when I told him I was considering taking out a maintenance contract. I will definitely be looking into your own one as an option. If and when my boiler needs replacing, I shall also definitely use AOS for the job. Keep up the good work! I have already passed on my AOS recommendations to friends and family. Thank you!
Deborah, Hertfordshire02/05/2018
Superb work
Customer Service
Quality
Value
Replacement of a 35 year old 'open' boiler system with a Worcester bosch system - involving difficult removal and complex replumbing and electrics. A hardworking and skilful team did a superb job under difficult conditions.
Neil, Essex30/04/2018
100% efficient!
Customer Service
Quality
Value
Couldn't be happier with the service we received from start to finish. If you're thinking of replacing your smelly, noisy oil boiler with an air source heat pump and receiving a rebate from the Government, I'd recommend AOS. Special thanks to Sam and Max for the very tidy installation.
Ronnie in West Wickham, Cambridgeshire27/04/2018
Prompt & Professional
Customer Service
Quality
Value
Very impressed with the installation of our air source heat pump. They were efficient, cleaned up each day & kept the place in good order despite this being a major installation. Would recommend them highly.
John, Buckinghamshire06/04/2018
Excellent work
Customer Service
Quality
Value
We found AOS to be professional and helpful throughout the process. We were offered a good product without any undue pressure. Facts were clear at all times. Installation was very well conducted.
Marilyn, Bedfordshire12/03/2018
Faultless. Very professional.
Customer Service
Quality
Value
From the initial phone call I made as an enquiry, to the handing over of the instructions for the air source heat pump, I have rarely come across a company where everyone has been professional, thoughtful (addressing concerns and keeping house tidy) and so well-informed. I would definitely recommend AOS.
Joanna, Hertfordshire20/02/2018
Professional service
Customer Service
Quality
Value
AOS Kept me informed prior to the installation, came when they said they would and did the job exactly as they said they would. Prompt, courteous and professional, and cleaned up afterwards.
Robin, Cambridgeshire19/02/2018
Boiler replacement and location move
Customer Service
Quality
Value
Replacement of an existing combi boiler including a move of the boiler to a new location. The interaction with AOS Heating has been a great experience from start to finish …. Communication great, punctuality of work fantastic, quality of work exceeded expectations especially around the pipework and “making good” and the work was carried out in an exceedingly professional manner (good bunch of guys). Very happy with the job all round. Would not hesitate to recommend your service.
Dean Palumbo25/01/2018
Mitsubishi Air Source Heat Pump
Customer Service
Quality
Value
We recently took the decision to replace an unreliable oil fired boiler with a Mitsubishi Air Source Heat Pump. Everything has worked out well. We were impressed with the AOS village meeting presentation. Within a week, we had requested a comprehensive survey of our property and all options had been identified. Thereafter, we requested the EPC and subsequently received a full proposal and quote from the office, including RHI explanations. At that point we decided to proceed, impressed by the Mitsubishi product and expertise of the AOS team. 7 new radiators were recommended by the Mitsubishi heat calculator. The Air Source Heat Pump and new radiators were fully installed just 4 weeks after our first consultation. This was first class service. Engineers were professional and skilled, got on with the job; always arriving on time; used dust-sheets and left the property tidy each day. Following completion (which took just 4 days, including fitment of radiators) the lead engineer, who had great knowledge, provided a comprehensive operating run-through and explanation of the aftercare. The install was carried out in cold, winter conditions. The system had a tough initial test and we were impressed that it does achieve target temperature in the property even with below freezing temperatures outside. We would have no hesitation in recommending AOS EEHS Ltd. and the Mitsubishi heat pumps. We have applied for RHI – the payment has been confirmed, and is in line with initial calculations.
David B09/01/2018
The trader replied (on 17/01/2018)
Hi Mr Boyd I am very glad to hear how happy you are with your new ASHP installation. i will also pass on your compliments on the engineers on your installation Sam and Ryan. I am also glad the RHI estimate i gave you at quoting stage matches up with what you are going to receive, its nice to know my calculations are on target. We looking forward to hearing from you in future when your annual service is due :)