This scheme was part of the government’s efforts to move the population towards renewable energy by offering incentives.

The scheme has been in operation since 2011, and has gone under several reforms and recommendations to improve the effectiveness of its operation. It is currently closed to new applicants.

The scheme was only open to home owners and was intended to improve the uptake of renewable energy offerings such as biomass boilers, solar water heating and the installation of heat pumps.

In 2015 there was controversy in regards to allegations that excess payments were made. Data on changes to the scheme is available here.

In one memorable instance, it was discovered that the RHI was on target to enable a homeowner to earn over £1m for heating a shed.

Its replacement is the boiler upgrade scheme also known as BUS.

It enables installers to claim a grant for the installation of air source heat pumps, biomass boilers and ground source heat pumps.

Ofgem note the figures stand as follows:

• £5000 off the cost and installation of an air source heat pump
• £5000 off the cost and installation of a biomass boiler
• £6000 off the cost and installation of a ground source heat pump, including water source heat pumps

A total of £450m in funding is available.

To apply for a grant you must meet a number of conditions that include a valid EPC or Energy Performance Certificate with no recommendations for loft or cavity wall installation. Full details for how to apply are available here.