AOS Energy Efficient Heating Systems Limited is committed to providing a quality service for its customers.

One of the ways we can continue to improve our service is by listening and responding to the views of our customers and in particular to responding positively to complaints.

We will always do our best to respond as quickly as possible and put matters right if we can.

If you wish to make a complaint about any of our services, you can let us know by:

AOS Energy Efficient Heating Systems Limited
Hammond Lodge
Hammondstreet Road


0800 028 28 23

An informal approach is appropriate when it can be achieved. But if concerns cannot be satisfactorily resolved informally then a formal complaints procedure should be followed.

We define a complaint as 'any expression of dissatisfaction (with AOS EEHS Ltd or with a member of staff) that relates to the Company and that requires a formal response'.

The formal complaints procedure is intended to ensure that all complaints are handled fairly, consistently and wherever possible resolved to the complainant's satisfaction.

Once we have received your complaint we will acknowledge receipt by email or letter within 5 days to confirm we have received it and let you know who will be dealing with this and the timescale we endeavour it will take to provide you with a full written response.
The timescale should be no longer than two weeks, however if your complaint is complex it may take a little longer but we will keep you updated by phone, letter or email.

All complaints are taken seriously and will be thoroughly investigated to ensure the all facts have been taken into consideration before we provide you with our reply.

If you are unhappy with the outcome of your complaint you can ask for this to be to be seen by a Director. If you still feel that your complaint has not been resolved, you can take your complaint to one of the following organisations depending on the nature of the complaint.

Gas Safe Complaints (Boiler & Heating Systems)

Gas Safe - 0800 408 5500
PO Box 6804, Basingstoke, Hampshire, RG24 4NB

Air Source Heat Pump Complaints

Microgeneration Certification Scheme
Suite G40, Innovation Centre Sci-Tech Daresbury Keckwick Lane Daresbury Cheshire WA4 4FS
Tel: 0333 103 8130
To visit the website click here

The Renewable Energy Consumer Code
The Code offers an independent Arbitration service that can be used in the event of a dispute not being resolved amicably between a Consumer and a Code Member.
The Code Administrator Renewable Energy Assurance Limited
6 Spring House Graphite Square Vauxhall Walk London SE11 5EE
Tel: 020 7925 3570
[To visit the website click here =Website:]


Public Liability Insurance details ;
Tokio Marine HCC Combined Insurance Policy No: HCC718743 Expires 29 June 2024

Public Liability £5m
Employers Liability £5m