Eligible energy sources
The Government intends the RHI to be available for most established renewable heat technologies
Eligible heat technologies
Initially only the following heat and combined heat and power (CHP) technologies will be supported:
- Biomass boilers
- Biogas combustion (but only up to 200kWth)
- Deep Geothermal
- Ground Source Heat Pumps (heating water)
- Energy from biomass proportion of Municipal Solid Waste
- Solar Thermal (but only up to 200kWth)
- Water Source Heat Pumps (heating water)
There are restrictions on many of these, which are given in the hyperlinks within each.
Renewable district heating is eligible if it uses one of these eligible technologies, at the same tariff level as stand-alone systems.
Eligible gas injection
The Renewable Heat Incentive will also pay a tariff for feeding biomethane from anaerobic digestion back into the natural gas grid.
There are no limits on the size of system except for the two shown above - where the limit is systems with a thermal capacity of 200 kilowatts.
For biomass heating (including heat from Municipal Solid Waste - MSW), there are restrictions on the fuels that can be used. For example no waste other than MSW is permitted.
There are also conditions applied to the sustainability of all bioenergy fuels further described in Chapter 5 of the government document.
Future and ineligible technologies
For the second Phase in 2012, other technologies will also be considered for inclusion, such as air source heat pumps, hot air heating (e.g. kilns), bioliquids and landfill gas.
See the government's thinking on these and other ineligible technologies.
The levels proposed for the heat output of each size and type of technology are shown on our tariff levels table.