1.3.1 Lower the DHW temperature set-point

1.1.3 Lower the DHW temperature set-point

Description

Water should not be overheated more than necessary (each 10°C rise in DHW temperature increases the energy consumption by around 15%). To save energy, it is recommended to adjust the thermostat of DHW at 60°C (this temperature should not be reduced to avoid problems of formation of legionella).

Benefits

  • The savings potential depends on the building’s water consumption. Savings of up to 30% of the electricity consumption dedicated to heat the water can be obtained

Limitations

  • Occupant acceptance

  • Operation and Maintenance (O&M) staff size, skill level, and budget need to be considered

Economic assessment

No cost.

References and best practices

Image gallery

CHARACTERIZATION

Environment or playable world:

  • Residential

  • Academic

  • Offices

  • All

Carried out by:

  • Public building users

  • Owners

  • Operators

  • All

Reduce consumption of:

  • Heating

  • Cooling

  • DHW

  • Lighting

  • Electric devices


Type of driver:

  • Physical environmental

  • Contextual

  • Psychological

  • Physiological

  • Social

Time framework:

  • Short term
  • Long term

Type of measure:

  • Envelope
  • HVAC
  • DHW
  • Lighting
  • Electrical devices
  • Other
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2018-01-19T12:09:11+00:00