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The thermodynamic water heater

The thermodynamic water heater is an ecological alternative to electric or gas models. Indeed, it allows you to heat sanitary water by taking the principle of the heat pump and therefore without spending fossil or nuclear energy. The thermodynamic water heater, a solution for the future or a luxury product reserved for wealthy ecologists? To make your own opinion, this week DIYDubranche invites you to discover the thermodynamic water heater.


The operation of the thermodynamic water heater.

operation thermodynamic water heater

The thermodynamic water heater consists of a water tank on which is a heat pump. The latter uses the calories contained in the air and transforms them into heat to warm the water of the balloon. To do this, the air is sucked by the pump and then it goes into an evaporator where it gives up its calories to the refrigerant, which therefore returns to boiling, then evaporates and eventually turns into gas. This gas, which is then at low temperature, then undergoes a new cycle by being sucked into the compressor. Its compression will then increase the temperature and the pressure of the gas. It then goes into an exchanger, the condenser where circulates the water that it must heat up. While the water is reintroduced by emitters into the flask, the refrigerant, now in the liquid state, hot, and with a lot of pressure is sent into the regulator. Then, its pressure will drop causing a drop in temperature and the fluid returns to the evaporator to start a cycle identical to the previous and reheat the air in the balloon.

The installation of a thermodynamic water heater.

The installation of a thermodynamic water heater must imperatively be carried out by a qualified professional, for example a heating engineer. Otherwise you will not benefit from the 36% tax credit that entitles you to purchase and install this type of water heater. In addition, it is a delicate operation that requires some expertise especially as the equipment is relatively expensive. Thus, for a thermodynamic water heater of medium size, installation included, it is necessary to count in 3000 euros. Attention, it is strongly recommended to make several quotes before signing to compete. Also note that in this sector scams are commonplace, so it is best to avoid door-to-door salespeople and learn about the company chosen. Finally, be aware that it is recommended to install the water heater in an insulated room, but not heated and more than eight square meters without it you will not have a sufficient volume of air for the proper functioning of the 'apparatus.

The advantages and disadvantages of a thermodynamic water heater.

The savings it makes on the energy bill seem to be one of the most interesting attractions of the thermodynamic water heater. Indeed, it is seen on average divided by 4 although the water heater consumes a little electricity to operate. Therefore, this device also has an ecological dimension because it is energy efficient. Nevertheless, we will regret a purchase price that is still too high, which only makes it profitable after a few years and makes it difficult for small budgets to access despite the tax credit. Finally, it is important to emphasize that this type of water heater does not support limestone.

The criteria for choosing a thermodynamic water heater.

The first criterion to take into account when choosing a thermodynamic water heater is its thermal coefficient of performance which gives you information on the efficiency of the appliance. It corresponds to the ratio between the energy supplied (the heat returned by the water heater) and the energy consumed (billed). So the higher the COP, the more efficient the water heater is. We must then look at the sound power of the water heater, expressed in decibel especially if it is located in a room passage. To know that for a "discreet" water heater it is necessary to aim for less than 40 decibels. Finally, at the level of the refrigerant gas, it is better to opt for the R134A, more efficient and less polluting than the gas R407C which is to disappear.

At the end of this article, it is clear that the purchase of a thermodynamic water heater seems to be primarily an ecological gesture and not economic. Indeed, this equipment would be profitable after about 7 years which seems long in view of the lack of perspective on the life of these devices whose rates are still high. It would be better to wait a few years before investing in a thermodynamic water heater.


Video Instruction: Thermodynamic Water Heating Panel System - Dundee - Angus - Scotland