Domestic hot water consumption largely depends on lifestyle, the number of occupants in the house and the specific type of application. For example, bathing requires more hot water than taking a shower. Often, however, the required water temperatures are also different. Lower temperatures are normally required in bathrooms, and higher temperatures in kitchens.

The following table can be used to estimate your water consumption and select the hot water solution that most fits your needs.

Estimated hot water consumption in bathroom and kitchen
Hot water consumption Liters/day/person at 45 C (bathroom) Liters/day/person at 60 C (kitchen)
Low consumption 15-30 10-20
Medium consumption 30-60 20-40
High consumption 60-120 40-80