However, as MCS is often a route to government incentives, it is likely to represent a significant proportion of deployment.Most installations registered with MCS are in the retrofit market. However, MCS may capture some new-build installations if contractors have chosen to register their installations with MCS.The number of installations above may include a small number of non-domestic installations which could not be cross-referenced against non-domestic Renewable Heat Incentive (RHI) data.