Renewable Heat Incentive tariffs – have changed over the years
The RHI tariff for GSHPs started at 3.2 pence/kWhr in 2011.
It has since been increased to 9.68 pence/kWhr.
RHI for ASHPs was introduced at 2.5 pence/kWhr in 2014.
The RHI tariff for small biomass started at 7.9 pence/kWhr in 2011.
It has since been "degressed" down to 3.05 pence/kWhr by July 2017.
The remaining RHI tariffs are broadly unchanged (apart from inflation adjustments).
See: Renewable Heat Incentive