The Renewable Heat Incentive (RHI), launched in November 2011, supports biomass and other renewable heat technologies with an allocated budget of £860 million, aiming for a 12% return on investment. As of July 2013, there were 1,789 accreditations, predominantly for biomass, with specific eligibility requirements for installations and ongoing obligations post-accreditation. Upcoming changes include tariff degressions and new sustainability criteria starting in April 2014, along with the anticipated introduction of a domestic RHI scheme for various residential heating systems in spring 2014.