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AOS Heating

AOS Energy Efficient Heating Systems Limited has been one of the leading experts in the heating & boiler industry for over 33 years.

Mitsubishi Heat Pump Installer

Established in 1984, we are family run business and are proud of the reputation we have accomplished over the years. AOS are a trusted company due to our outstanding customer service record. 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.

AOS are 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. Our fully qualified engineers will survey your property, determine what you want from your new equipment and recommend a heating system that's perfect for your needs. Whatever the job, you can rest assured that you are in expert hands.

Here at AOS we want to make paying for your new installation as easy to manage as possible. You can spread the cost by choosing one of our payment options that best suits you, so you don't have to put your new heating install on hold.

With AOS Heating having a new heat pump installed is easy:

  • AOS heating engineers conduct a FREE, no obligation survey of your property
  • The size of your house, the dimensions and number of rooms and even the placement of your windows are all used to provide a detailed costing for the installation and estimated energy savings from your installation.
  • Once you’ve been able to consider your potential savings if you wish to proceed the system is installed by our expert and specially trained technicians.

Mitsubishi Accredited Heat Pump InstallerWorcester Bosch Accredited InstallerGreen Deal ProviderGreen Deal Installer

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AOS Heating is based in Cheshunt, Hertfordhire and serves customers in Hertfordshire, Bucks, Beds.


  • Air Source Heat Pumps
  • Gas Boilers

* - AOS Energy Efficient Heating Systems Limited: MCS and RECC Details

MCS Certificate Number: NIC4238
Date Certified: 07/06/2013
Technologies: Air Source Heat Pumps, Exhaust Air Heat Pumps, Ground Source Heat Pumps, Solar Photovoltaics, Solar Thermal

MCS Information checked: 16/11/2017

RECC Membership checked: 16/11/2017


Gas Safe Registered number: 12627

Gas Safe Information checked: 16/11/2017



You should verify up to date accreditation (e.g. MCS, Gas Safe etc) for both installer and product before you go ahead.