Constant temperatures practically always above 30 degrees. This has been the case for days in most Italian cities. In Milan there were blackouts from the center to the suburbs, impossible to go up on the terraces of the Duomo for the evening opening scheduled every Thursday. Temperatures show no sign of decreasing in the next few days, according to forecasts the peak could be on Tuesday 21st, summer solstice, and Wednesday 22nd. Peaks of 40 degrees in many cities of the Po Valley. This situation could therefore be repeated. To cause it above all i conditioners always on.
However, keeping the air conditioners running always leads to a very high expense. If you want to aim for energy saving, given the expensive bills, there are the advice ofNational Agency for New Technologies, Energy and Sustainable Economic Development. Enea aims to protect the environment, but also to save money. According to the calculations made by the institution, with the right measures, up to 1.8 billion cubic meters of methane gas per year could be saved nationally, approximately 2.5% of Italian consumption in 2021.
Model
The first attention must be on the choice of the air conditioner model. “Regardless of the technology, air conditioners are always preferred energy class higher than A because, in addition to a reduction in CO2 emissions into the atmosphere, they consume much less ». Air conditioners with inverter control system are more expensive but preferable to those equipped with on-off technology because energy consumption and noise are lower.
The cold
Never get too cold. Two or three degrees lower than the outside temperature are enough. To eliminate the oppressive sensation of heat caused by humidity, it is advisable to activate the dehumidification function. According to the simulations made by Enea, bringing the thermostat from 26 to 28 ° C can save about 25% of energy.
Windows
Obviously the windows must be closed, but also the shutters and shutters must be lowered during the hottest hours of the day. “Close the shutters, lower the shutters or screen the windows in the central hours of summer days it allows to reduce the energy required by the air conditioners. The savings due to this measure vary according to the exposure of the house and the quantity of glazed surfaces, but it is estimated that it allows savings of up to 25% on average of the initial consumption ».
The doors. «The air conditioner cools and dehumidifies the environment in which it is installed by transferring heat and humidity to the outside. The entry into the room of “new” hot air forces the equipment to perform additional work to bring the temperature and humidity to the required levels, with a consequent waste of energy ».
The position
The air conditioner must be in top of the wall because the cold air tends to descend and mix with the hot air which instead tends to rise. It is not recommended to install a single air conditioner, for example in the corridor to try to cover several parts of the house. Better one for each room.
Isolation
To avoid dispersion, the refrigerant circuit pipes outside the house must be thermally insulated. The outside of the air conditioner must not be exposed to the sun and bad weather.
Times
The advice is not to keep the air conditioners on all the time, but to use all the time limitation functions: timer or night function.
Maintenance
Air filters and fans must be cleaned up at the first seasonal ignition and at least every two weeks. The tightness of the gas circuit must also be checked.
The rest of the house
Also in the rest of the house you have to look at the savings rules. One tip is to replace incandescent bulbs with others a LED which produce less heat. In general, it would be advisable to have an energy diagnosis of the building carried out by a technician to assess the state of the thermal insulation of the walls and windows and the efficiency of the air conditioning systems.
«The installation of solar thermal and photovoltaic panels it can allow homes to be completely independent from external supplies of electricity and / or other fuels. The use of thermal solar panels can fully cover the needs of a family for the production of domestic hot water from April to October, saving approximately 175 cubic meters of gas ».
Incentives
For the installation of solar thermal systems, it is possible to access the Thermal Account 2.0, tax deductions of 50% (home bonus) and 65% (eco-bonus). The same thing applies to the installation of heat pumps, if they are intended to replace the old system. For photovoltaic systems there is the home bonus incentive with a 50% deduction.
– Air conditioners, from May 1st the rules for the summer come into force
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Source: Vanity Fair
