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Five things that (maybe) you did not know about hydro stoves

Let's take a closer look at the pellet hydro stoves

The "hydro stoves" or "thermo stoves" are those heat generators that are connected with the existing hydraulic system and they heat the water for radiators instead of producing hot air. Here below you can find five curiosities that you did not know about this very interesting product.


1. Hydro stoves are "cooler" on the outside compared to other stoves.

This is because they are designed to exchange as much heat as possible with the system water, instead of with the room.

The power of the hydro stoves is indicated by two values. The first value indicates the total product power and the second one indicates the power transferred to the water. Usually the difference between the two is 2-3 kW and indicates the heat that the stove transfers naturally to the room in which it is installed. You will notice that tt is not a very high value!


2. If the living room in which you will install the hydro stove is small, it is best not to fit a radiator.

In the event of a small installation area, possibly even well insulated, the 2-3 kW of heat that the stove transfers naturally to the room are already enough. The radiator may be excessive!


3. The more powerful hydro stoves can heat and produce domestic hot water, but in this case it is always best to combine them with a puffer.

The water stoves over 20-22 kW, such as the model Swing of MCZ in the picture here below, can be combined with a special kit for producing instantaneous domestic hot water (DHW kit). The disadvantages are that the water comes out of the tap already hot only if the stove is switched on and running at full power. While if it is switched off or running at minimum power, it could take several minutes for it to heat up. The water flow rate is not very high either; this is why it is always recommended to combine it with a puffer.

Stufa hydro Swing

4. When the hydro stove works in combination with an existing system, a plate heat exchanger is required.

The hydro stove can work as a single home heat generator or in combination with the existing gas, methane gas or LPG system. In this case, to make the two systems “dialogue” with each other, an instrument called “plate heat exchanger” is required for the exchange of heat between the different systems.


5. The hydro stove must never be connected directly to the radiator.

It is absolutely not recommended to connect a hydro stove in place of a radiator, reusing the pipes that connected it to the system. This is because in 99% of cases the diameter of the pipes is too small for the water to circulate sufficiently: the stove would end up only heating a part of the radiators or not reaching the desired temperature.

The hydro stove must be connected to the hydraulic manifold, i.e. the “maze” of hydraulic pipes that is usually under the staircase or in the bathroom. Only this way the hot water that it produces is able to reach all the radiators of the system.

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