Please note that whilst CENTURY 21 Heave-Ho Properties. endeavour to provide accurate information in respect to the mortgage calculator, the use of the same is at your own discretion and risk and CENTURY 21 Heave-Ho Properties. does not accept responsibility for any consequences that may arise from your reliance on the respective institutional interest rates and the calculations provided therein. Further, the mortgage calculator is intended for guidance only and you are advised to seek professional specialist advice from your financial or mortgage institution.