We can increase our comfort while simultaneously reducing heating costs.
It is well known that the lower the temperature of the water used to heat the house by our boiler, the more economical it is. This is especially true for condensing boilers. Whether it’s an old open fire or a turbo gas boiler, caution is needed because the return water temperature to the boiler must be higher than the dew point of the flue gas. This is approximately a threshold value between 55–60 degrees Celsius. In condensing boilers, the key is that the return water temperature is as low as possible, as the condensation of the flue gas below the dew point is stronger, meaning the precipitation of water vapor from the flue gas. This precipitation, the change of state, comes with additional energy release. The lower the temperature of the water used to heat our home, and by better dissipating this heat, making the return water as low in temperature as possible, the better efficiency we can achieve in operating our condensing boiler.
Here, the heating pipe is already in the living room wall:
All of this is fine and good — however, the lower the temperature of the heating water, the more difficult it is to give off heat, as the temperature difference between the room temperature and the advancing water temperature becomes smaller. This problem can only be solved by increasing the surface area of the heating element. Beyond a certain size limit, implementing this with a radiator would be impractical. Especially considering that multi-panel radiators increasingly enhance heat dissipation through convection (i.e., by heating the air) and to a lesser extent through radiation. This is not advantageous, as heat emitted through radiation provides a more pleasant sensation even at lower temperatures.
On the other hand, if we use underfloor, wall, or ceiling heating, we can heat a larger surface area. This warm, radiant heating ensures a comfortable feeling of warmth.
If we want to live in the apartment during heating system improvements (now specifically discussing water heating), among the three surface heating methods, wall heating comes with the least dust, clutter, and inconvenience, using the following method — provided there is available wall space. And there was.
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