Government incentives for switching to air source heat pumps remain at generous levels. The government will pay you to change to an air source heat pump through the commercial Renewable Heat Incentive (RHI). The RHI will pay you for up to 20 years (for commercial installations) and you will receive quarterly payments, this means that you can turn your heating system into an additional income, rather than a cost. Payback will vary depending on the size and complexity of your installation, but a typical installation could show a payback on its entire cost within five years, with the RHI continuing to provide another 15 years of income at no cost to you.
For the current RHI Tariff rates please see – https://www.ofgem.gov.uk/environmental-programmes/non-domestic-rhi/contacts-guidance-and-resources/tariffs-and-payments-non-domestic-rhi