We then invite everyone to chip in to raise enough money for the loan. The resultant savings on energy/fuel bills cover the loan repayments into our revolving fund.
We then use more new donations and loan repayments from earlier projects to give a loan to the next project. Once that is paid back, the money is combined again with new donations for another project and so on.
In this way one donation is used over and over again, multiplying its impact! The proportion of new donations vs repayments used for specific project loans can be seen under each of the projects on the Completed Projects page.