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Trusted Traders

AOS Energy Efficient Heating Systems Limited

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4.8

137 Reviews

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

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
    • Biomass
    • Solar panels
    • Solar water heating

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.

4.8
137 reviews
Customer Service
4.9
Quality
4.9
Value
4.7
Sort by
Great service
Customer Service
Quality
Value
AOS answered the emergency call of my tenants, whose boiler had broken down and was beyond economical repair. They quoted competitively for a replacement boiler and installed within a couple of days - excellent service given that it was just a couple of (very cold) days before Christmas! Thank you, AOS
Customer in Hertfordshire Posted on 15/01/2021 , work completed 21/12/2020
Good installation but beware of expected efficiency benefits
Customer Service
Quality
Value
AOS installed an air heat pump system for us in June 2020. The work was carried out quickly and efficiently by professional installers and we were initially happy. However, when we subsequently had our property re-assessed for energy efficiency to claim the RHI rebate, we found that the energy efficiency had actually got worse on water heating than with our old oil boiler, with our EPC rating for water heating falling from average (with our old boiler) to poor (with the new air pump.) This risk was never explained to us when we signed up to have the work done. The EPC is a public document and can influence future buyers of your property. The “poor” rating for our new system’s water heating efficiency was most definitely not what we expected. Check carefully before you have one of these systems installed. The efficiency improvements you expect for your home may not happen in practice. They didn’t for us.
Customer in Buckinghamshire Posted on 21/12/2020 , work completed 24/06/2020
The trader replied (on 05/01/2021)
Due to a word limit our reply below has been reduced : Hi Mr Drew, As you are aware EPC's are carried out by independent assessors using the government tool & we have no control over the information documented within these EPC’s nor could we predict what efficiency will be calculated on a new EPC after an install. Although your EPC states that your hot water is rated has gone from ‘average’ to ‘poor’ your heating rating has improved from ‘average’ to ‘good’ along with the heating control improving from ‘good’ to ‘very good. The important thing to highlight is your system will actually be in ‘heating mode’ for an estimate of 75% of the time (13,207kWh) and the hot water only 25% (2,960kWh), these usage figures have been taken from your EPC. When you consider that your old oil boiler in heating was graded at ‘average’ & the new heat pump is now ‘good’ for heating this improvement to 75% of your overall energy demand completely outweighs the ‘poor’ grade for the 25% hot water usage. We have spoken to Elmhurst Energy the EPC accreditation for clarification and they have confirmed that when looking at air source heat pumps for hot water purposes, combined with a immersion boosts the system does not recognise the efficiency of modern heat pumps from previous inefficient models that required a immersion heater to top up the hot water which your system does not do. Due to the lack of update to the government data EPC’s are not a great reflection of the efficiency of a system.
Air Source Heat Pump Installation
Customer Service
Quality
Value
We have found the whole process with AOS of installation from survey, to quote, to installation to after sales to have been of an excellent standard. Every point of contact every time has done what they have said they would do without fail. Every point of contact has been knowledgeable, polite, efficient and has taken ownership of any issues and dealt with them efficiently. We feel the installation has been executed to an extremely high standard of workmanship and that we are in safe, reliable hands going forward. We have a warmer, "greener" house and are more than satisfied with our choice of supplier who has got us to where we are today.
Customer in Buckinghamshire Posted on 17/12/2020 , work completed 09/12/2020
The trader replied (on 05/01/2021)
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Gas Boiler problem
Customer Service
Quality
Value
We contacted AOS, explained our problem - no hot water or heating - boiler just not working. The arranged a date for someone to look at the problem. Person turned up on time, we explained the problem. A thorough inspection was made and the result explained to us with the options available. We chose a replacement boiler and because I am 80 and disabled, got priority treatment in setting a date. On the day, two people turned up and the job duly completed. various ancillary probes found and explained with solutions suggested. The whole experience was excellent and we will almost certainly sign up for a maintenance contract.
Customer in Hertfordshire Posted on 19/11/2020 , work completed 19/11/2020
Great service
Customer Service
Quality
Value
AOS replaced our LPG boiler with an Air Source Heat Pump and we were very impressed with the service we received. The engineers were punctual, polite and worked hard. The office staff were extremely helpful with all the paperwork needed both before and after the installation. We would have no hesitation in using them again. Louise Hanzi
Customer in Cambridgeshire Posted on 19/11/2020 , work completed 06/11/2020
My new boiler
Customer Service
Quality
Value
A O S Heating I found to be a totally efficient firm, professional, and up to speed with latest products and regs. Friendly, helpful, a joy to deal with
Customer in Hertfordshire Posted on 11/11/2020 , work completed 10/11/2020
Installation of Air Source Heat Pump System
Customer Service
Quality
Value
I have recently employed AOS to install an Air Source Heat Pump System in my house to replace the oil fired boiler. The installation team were excellent, turned up on time, completed on schedule and even cleaned up after themselves. When there was a small problem it was resolved quickly with no extra cost. The extra mile was also gone in terms of putting our airing cupboard back together after the new boiler was installed and doing a neat repair on the wall in the breakfast room. I would definitely recommend AOS.
Simon in Cambridgeshire Posted on 09/11/2020 , work completed 06/11/2020
New boiler fitted
Customer Service
Quality
Value
Have been with AOS for over 10 years, all servicing on my old boiler has been carried out regularly and extremely efficiently. Due to the age of my existing boiler I asked AOS to supply and fit new one. Engineer arrived promptly and installed the boiler, cleared up any mess and took great trouble to explain all the new equipment to me. Everything was completed within a very short time. I would thoroughly recommend this company and applaud their efficiency.
Customer in Greater London Posted on 07/11/2020 , work completed 07/11/2020
AOS ASHP installation
Customer Service
Quality
Value
AOS surveyed our property and installed an air source heat pump and iBoost. The work was carried out to the agreed schedule and budget. All employees communicated well with us and were very helpful. The installation team were thorough, industrious and considerate.
Customer in Milton Keynes Posted on 01/11/2020 , work completed 22/10/2020
Excellent work, great communication, polite and efficient staff
Customer Service
Quality
Value
All aspects of installing the heat pump were excellent: communications with the office staff were clear, informative and comprehensive; the installers were efficient and polite, and everything went to plan. Very pleased with the heating system.
Customer in Cambridgeshire Posted on 23/10/2020 , work completed 09/10/2020