Domestic Hot Water (DHW). Do You Really Know Everything?

Domestic hot water production can be done in many more or less economical and more or less polluting ways. Let's delve into the subject.

Today we are very attentive to the environment but also to the wallet. The production of domestic hot water has always been a cost for families. The technologies used for this purpose were many: from the fire created by wood, pellets, methane gas, diesel and electricity through resistances ... up to modern heat pumps. Let's go deeper into the topic that has been giving well-being to us Humans for a long time, we who do not give up a nice hot tub or an effective invigorating and therapeutic shower ... which fills us with vitality, well-being and a good start of the day ...

A self-respecting modern home cannot do without hot water produced at very low cost with a non-polluting system that respects the environment and our pockets. The best system currently available is the one with heat pumps whose operation is Air-Water at high temperature. Leonardo OasiHouse® made a not exactly obvious choice to give his customers the best, choosing a dedicated heat pump for domestic hot water only. Therefore a system totally separate from the building's heating/cooling system, capable of operating completely on its own and separately from any other heat/cold producer.

This choice is to avoid truly inappropriate "inconveniences" such as running out of domestic hot water when you need it or having the villa's heating stopped because the only available heat pump is already occupied by another function in progress such as example the heating of the sanitary water or the cooling of the floor coils in summer. It is known that a single heat pump capable of heating the house, cooling the house, heating domestic water, is able to carry out these tasks separately, or does one thing or does another. Mai manages to perform two tasks at the same time. So our choice is absolutely deliberate and avoids unwanted inconveniences.

To be appreciated and efficient, a system must work at a low electrical power (ours is under 2000 watts) and use an ecological gas such as R134A. In addition, the accumulation tank must be super insulated and well sized ... For this reason we prefer to abound with the tank so as to never use the emergency resistance in the event that the water has all been consumed and for this we use accumulators of almost 300 liters so as to work smoothly and possibly when energy costs us less ...

This stupendous technology heats domestic hot water up to 60°C by exploiting the free heat present in the ambient air. For this reason, energy efficiency is truly unprecedented. It is estimated that an average Italian family achieves ECONOMIC SAVINGS equal to 75% compared to the use of electric water heaters and as much as 35% compared to the use of condensing boilers.

Our systems allow you to store approximately 300 liters of domestic hot water in a safe steel tank suitably insulated so as not to waste heat. Furthermore, safety is at the highest levels: we know that the Legionella bacterium is extremely dangerous and for this reason there is an AUTOMATIC ANTI-LEGIONELLA MANAGEMENT that sanitizes the water for total safety.

Moreover, always attentive to the environment, the system we offer is expandable and can be combined with new renewable energy systems such as SOLAR THERMAL, GEOTHERMAL AND PHOTOVOLTAIC. All this contributes to the reduction of CO2 emissions.

Leonardo OasiHouse ® has preferred the combination of heat pumps - photovoltaics for domestic hot water, so as to use clean energy, self-produced thanks to the sun. This gives amazing results:



INTRODUCTION - Let's define the word "COP" here:

What is the COP?

The efficiency of a heat pump is measured by the coefficient of performance "COP" (Coefficient of Performance). This parameter is given by the ratio between energy yield, i.e. heat which in our case is transferred to the water to be heated and electricity consumed; the higher the COP, the more efficient the heat pump is and consumes little. For example, a Cop value of 3 means that for 1 Kw of electricity consumed taken from the network or from the photovoltaic system, the heat pump will return 3 Kw of thermal energy to the water to be heated.

So 1 Kw is supplied by the electricity that we self-produce thanks to the 6 Kw of photovoltaic panels positioned on our roof and the other 2 Kw are taken free of charge from the external environment thanks to the technology in question.

This premise is necessary since our water heating system has a COP of 3.3 -

IT IS THE HIGHEST ENERGY EFFICIENCY AMONG THE HEAT PUMP WATER HEATER EXISTING TODAY. This means that for each Kw of electricity used, our water heater will generate 3.3 Kw of heat. Not bad, right?

The maximum temperature of the hot water produced is 70°C


The innovation that these machines bring us is fantastic because thanks to the heat naturally contained in the air, our systems recover a large part of the energy necessary to carry out the work for free. The principle is that of the refrigerator but reversed. So for every Kw of energy taken from the network or self-produced, our machine multiplies the electricity it returns to the water by 3.3. Domestic hot water is thus heated by exploiting for the most part the free heat present in the ambient air. The 75% saving in bills compared to the traditional electric water heater is truly surprising and remarkable. Even compared to "modern" systems with condensing boilers (methane) it is possible to have truly remarkable energy savings: 35% less on the bill!

Now domestic hot water costs less thanks to our heat pump that heats domestic water efficiently and economically.