Endorsed by Which?

AOS Energy Efficient Heating Systems Limited

4.9

253 Reviews

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

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

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
253 reviews
Customer Service
4.9
Quality
4.9
Value
4.8
Sort by
Satisfied customers
Customer Service
Quality
Value
AOS have provided an excellent service--from the sales process, to quotation, to timing and installation. We have only had the heat pump for a few days but are very happy with the product too.
Customer in Cambridgeshire Posted on 20/01/2020 , work completed 16/01/2020
Installation of new heat pump system
Customer Service
Quality
Value
From initial contact to completion, AOS were superb! Our existing heating system failed and we needed immediate help. Sales support was good with the explanation of exactly how the system worked and explaining how to gain government financial support made our decision easier to make. The two people who came to install the system were amazing. They were very tidy and conscientious of the disruption as we had no heating over a 4 day period in January. In addition, because we had a failed system, we were pushed up the list and were the first installation of the New Year. Everything was explained and expectations were met. The office administration was good and were challenge at a difficult time over Christmas and New Year. We could not have asked for better service due to the circumstances. We are happy with every aspect of the service from AOS and would highly recommend installing this system which in the longer term will save money.
Customer in Buckinghamshire Posted on 19/01/2020 , work completed 29/10/2019
Great work, friendly people and a smooth process throughout
Customer Service
Quality
Value
I had a heat pump and new tank installed by AOS, as well as connecting to existing underfloor heating. They sent me an exact quote ahead of time, and completed the works exactly as planned. I found the process throughout was very good: the initial visit, keeping in touch with the office during the planning, and the final installation. I found that the whole team from the office to the installers and people at our house were very friendly, and they handled a few unexpected changes excellently. I would highly recommend them, both for the fair pricing, and the peace-of-mind knowing that they were very easy to get in touch with and keep me updated on the progress.
Customer in Cambridgeshire Posted on 19/12/2019 , work completed 12/12/2019
Polite, professional and competent.
Customer Service
Quality
Value
The two young men who removed the old boiler and then installed the new one, were both polite and professional.when they first arrived they put down dust sheets and were very careful to keep mess to a minimum. they installed the boiler, gave us a rundown on the work that had been done gave advice on operation and answered our questions clearly. Very happy with the work done. have been with AOS for years and can thoroughly recommend them.
Customer in Hertfordshire Posted on 04/12/2019 , work completed 04/11/2019
Excellent workmanship.
Customer Service
Quality
Value
Prompt, efficient and helpful installation. Workmanship and courtesy could not be faulted. Installers always had time to explain what they were doing and how things worked. Cleaned up and you would never know they had been. Committed to doing a first class job and equally committed to AOS - very refreshing attitude.
Ivor, Hertfordshire Posted on 03/12/2019 , work completed 03/12/2019
Excellent installation
Customer Service
Quality
Value
I don't normally write reviews but I must say AOS sent 2 engineer s to fit a new boiler system in my home, it took only 1 and 1/2 days the boys were very polite the workmanship was excellent and took time to explain things, they tidied up. Really, really happy.
Customer in Essex Posted on 26/11/2019 , work completed 22/11/2019
First class service
Customer Service
Quality
Value
My boiler broke down and we had no heating. I was experiencing difficulties with another service provider whom I am in contract with for emergencies. I contacted AOS and spoke to Kerri, who had an engineer out within a hour. The fault was diagnosed and repaired by a professional engineer, all in the same day. I cannot express my gratitude to this company for their efficient, professional and speedy service. The price we paid was half of what I was quoted elsewhere. Will most definitely use this company from now on. Thank you so much to Kerri for arranging this and keeping in contact with what was going on and to Tony for doing a speedy/professional repair. Thank you.
Customer in Hertfordshire Posted on 21/11/2019 , work completed 20/11/2019
Top company
Customer Service
Quality
Value
I called AOS to service my old boiler Several parts needed replacing which the engineer explained to me he could do and the costings however due to the age of the boiler and its condition I was probably going to need a complete new boiler replacement soon. The engineer answered any questions i had and left me with a decision to make I phoned him the following day and decided to go ahead with a new purchase Throughout the whole process the engineer was extremely helpful explaining choices and the costings of the work to be carried out I am very pleased with the work that was carried out he also corrected some old pipework that I no longer needed. The work was followed up with a good aftercare service.
Customer in Essex Posted on 19/11/2019 , work completed 12/11/2019
Air source heating installation
Customer Service
Quality
Value
The installation engineers arrived promptly each morning, were polite, tidy and completed the job in the specified timescale. They made a considerable effort to minimise the amount of visible pipework and position the unit as inconspicuously as possible. I would thoroughly recommend this company to anyone thinking of having air source heating installed.
Customer in Cambridgeshire Posted on 19/11/2019 , work completed 15/11/2019
Prompt and professional.
Customer Service
Quality
Value
Very hard workers, unobtrusive and taking far less time than expected. Explained very clearly about the workings of the new boiler and checked relayed items, e.g. stopcocksand gas hob. I couldn't wish for more!
Elaine, Hertfordshire Posted on 08/11/2019 , work completed 08/11/2019