The geyser

Always install your hot water system in accordance with the manufacturer’s instructions.
Pay special attention to the size of hot water pipes and the installation of the first 1.5 to 2 metres of hot water pipe nearest to the geyser.
Locate your hot water system close to points of most frequent use like the kitchen and the bathroom.
A hot water tap that leaks one drop per second for a month adds up to 800 litres of water that you cannot use yet paid for in heating cost.
Normally, you use less hot water for a shower than a bath.
Get the family into the habit of plugging the water basin when washing or shaving. Allowing hot water to pour out of the taps and down the drain is wasteful and ex-pensive.
Do not set the thermostat too high. A setting of 50°C (122°F) to 60°C (140°F) is recommended.