Solar Hot Water

sol hot water
 sol fit

The hot water calculation incorporates the estimated water usage based upon CIBSE design guide and SAP 2012 requirements. In addition to the occupancy details, enter the hot water cylinder information and select the current heating system.


This calculates the solar input which is the RHI value and estimated fuel saving based upon the current heating system.

Feed in Tariff

In order to calculate the renewable-heat input RHI calculation go to the feed in tariff page where you need to select the EPC Band and the relevant tariff. Enter the system cost, payback period and annual maintenance charges. Use the "apply" button to save your changes and updated graphics. This will display the graph showing the payback period and the benefit to the householder.