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
Best practices for efficient hot water distribution in multifamily buildings: www.aceee.org/files/proceedings/2012/data/papers/0193-000030.pdf
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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
