Domestic Renewable Heat Incentive (RHI)

Please note, these are constantly subject to change, up-to-date information on tariffs and availability can be found here.

What is the RHI
The RHI is a government financial incentive designed to encourage the uptake of renewable heating technologies. To do this eligible households will receive quarterly payments for seven years based on their actual or deemed heat generation. These payments will assist the household with the cost of installing the renewable technology.


The premises in which the renewable technology is installed must be considered a domestic property.
The renewable technology installed must have been installed after 15th July 2009
The technology and installation must be certified under the Microgeneration Certificate Scheme (MCS)
Eligible technologies-

  • Biomass (wood fuelled) boilers
  • Biomass pellet stoves with integrated boilers providing space heating
  • Ground to water heat pumps
  • Air to water heat pumps
  • Solar thermal panels (flat plate or evacuated tube only) providing hot water for your home.

Not eligible technologies-

  • Air to air pumps
  • All log stoves
  • Pellet stoves without back boilers
  • Hybrid PVT

The applicant must be either the owner of the property or the occupier of the property.

Deemed or actual heat generation

Unmetered installations

For biomass installations the ‘deemed heat generation’- the estimated kWh required to heat the house over a 12 month period- is taken from the properties Energy Performance Certificate (EPC).
For heat pumps the deemed heat generation takes into account the seasonal performance of the heat pump-
Deemed heat requirement on EPC x (1 – (1/Seasonal performance factor))
If the property uses the renewable source to heat both the space and the water heating this will be taken into account.
For solar thermal installations the MCS Thermal Solar Performance Energy Calculator will be used (in legacy applications the deemed heat generation will be decided by the Authority based on information regarding the installation).
The calculation for the quarterly payment is therefore-
Tariff x (Deemed annual heat generation/4) – any grant funding received

Metered installations

Some installations will require a meter to assess their annual heat generation. Your installation must be metered if
it is not a solar thermal installation and it provides heat to the same property as another source except where the second source is-
• A fire or stove which only provides heat to one room
• A heat exchange
• An immersion heater for domestic hot water
• A supplementary electric heater controlled by the same system (eg an immersion back-up)
It is a biomass system which is not sufficient in size to provide space heating for the whole house.
If the property is occupied for less than 183 days in a 12 month period from the RHI start date.
It is a heat pump which can combine heat generation with a fossil fuel.


The scheme was launched on the 9th April 2014. To apply please go to the Ofgem website. However, if you are applying as a legacy applicant (someone who has already installed a technology between 15th July 2009 and the launch date) there are guidelines as to when you can apply.

All applicants must have had a Green Deal Assessment completed for their property* and installed loft and/or cavity wall insulation if recommended in the Green Deal advice report.

*If the property is a new build, it will not require a GDA.

*As of the 5th of February 2015 DECC announced their intention to remove the requirement for a green deal assessment for social landlords.

For further information on the Domestic Renewable Heating Incentive, click here.


Our Current Live Projects