An easier option is the HeatingSave central heating control system, which delivers savings of up to quarter — you will not find that on an online tariff. This uses the principle of "install and forget", as its controller makes heat-saving calculations based on the outside temperature, the inside temperature and the heat-loss algorithm that it creates for each building or heating zone. You can track how much your heating is costing on the included PC software. The home system costs only £428 plus VAT when purchased on-line at www.heatingsave.co.uk, and can pay for itself in just 12 months.