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Endorsed by

Which

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Trusted Traders

AOS Energy Efficient Heating Systems Limited

Opening Hours
Today -
  • 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
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4.8

56 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
56 reviews
Customer Service
4.9
Quality
4.9
Value
4.7
Sort by
Great company
Customer Service
Quality
Value
We used AOS to install a new Worcester Bosch boiler. Staff were very helpful throughout the process, the appointment was quickly arranged and the team who completed the work were tidy and completed the job in one day. Very friendly and I can thoroughly recommend. My neighbour is now using AOS for a new boiler also!
Andrew Waller09/09/2018
Excellent.
Customer Service
Quality
Value
Complete new central heating system. Everything from start to finish was so professional. Exactly as promised, so tidy and knowledgeable. Would recommend them to anyone.
David, Hertfordshire04/09/2018
Swift and professional service
Customer Service
Quality
Value
My wife and I attended presentations in June 2018 by AOS in our village hall regarding air source heat pumps and were impressed. We requested a survey and decided to go ahead and replace our oil fired heating and 30-plus years old boiler. We could have risked keeping the oil boiler going but it would probably have packed up in the depths of winter and it takes time to plan for and install a new heat pump. We were impressed with the swift and tidy work of the installation team, who not only installed the new pump but replaced the hot water cylinder and eight radiators, all within five days. The job was finished within eight weeks of our attending the presentation. The support we received from the team back in the office was excellent and AOS have done everything they said they would do, at the price they quoted.
Helen and Richard16/08/2018
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