New RHI regulations have been laid by the Department for Business Energy and Industrial Strategy. Subject to parliamentary approval, these regulations are expected to come into force in Spring 2018. These regulations if approved will introduce a number of changes and new policies including tariff guarantees and shared ground loops which were announced in the December 2016 government response: ('The RHI: A reformed scheme'). They will also introduce changes to eligible heat uses which were announced in the January 2018 government response: ('Non-domestic RHI: Eligible Heat Uses').
Tariff guarantees will be available for biomass CHP, geothermal and biomethane applications of all sizes, as well as for biomass over 1MWth, biogas over 600kWth and ground source heat pumps and water source heat pumps over 100kWth. Also from the date the regulations come into force, applications submitted for a system where a ground loop is connected to two or more heat pumps, will be classified as a shared ground loop system.