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 [...]
1.3.2 Adding or repairing tank insulation Description It is recommended to properly insulate DHW storage tanks to limit heat losses. Insulating the hot water tank is an easy and inexpensive way to improve energy efficiency and save money. For an electric water heater, it also might be considered insulating underneath the tank [...]
1.3.3 Adding or repairing DHW distribution systems Description It is recommended to properly insulate pipes to limit heat losses, as well as to install the boiler/accumulator as close as possible to the consumption end points to limit the losses that occur through the walls of the pipes. The insulation normally used for [...]
1.3.4 Maintenance and inspection of DHW pumps Description The water needs to be boosted by electric pumps to get to the different end points of consumption of a building. The resulting electric consumption can become an important part, especially in high buildings; therefore it is necessary for the installation to be dimensioned [...]
1.3.5 Installation of a timer for the DHW recirculation pump Description It is recommended to install a timer that disconnects the recirculation pump during the hours in which there is no demand of DHW in the building. Benefits In addition to saving energy, the lifespan of the [...]
1.3.6 Installation of a timer for the DHW boiler Description The measure consists in installing a timer (digital or analogic) which turns off the boiler when there is no demand of DHW (e.g. in residential buildings during the night there is no relevant demand of DHW). Benefits [...]
1.3.7 Installation of mixing valves in the outlet of the DHW tank Description A thermostatic mixing valve mixes cold and hot water, generally with a temperature differential of at least 7°C, in order to obtain mixed water at a stabilized temperature, avoiding in this way losses of hot water while adjusting the [...]
1.3.8 Installation of taps with flow reduction (faucet aerator) Description One of the solutions to save water and energy consists of the placement of an aerator at the exit of the water taps. These devices are screwed into the output of the faucet, reducing the flow of water and they are compatible [...]
1.3.9 Adding or repairing water heaters insulation Description Insulation of water heaters is necessary to protect against contact with hot surfaces and to ensure an acceptable working temperature in the water heater house. Insulation of water heaters is a very efficient way to keep your water hotter for longer, especially if the [...]
1.3.11 Use shower instead of bath Description Take a shower instead of a bath. A full bath (140-180 litres) wastes about three times the energy and water compared to a five minutes shower Benefits Energy savings Water savings Limitations Occupant acceptance [...]
