Thermomodernization of
the house often involves the replacement of a heating device, which is most
often a boiler. Is it necessary? To choose a device with optimal
heating power, it is necessary to calculate the heat demand of the house after
thermal modernization. As a
result of insulation of the house, it usually decreases by several dozen
percent, so that the power of the boiler used so far becomes much too big and
it can start to cause problems.
Why is it worth
replacing the boiler?
Boiler with a power far
greater than needed, does not work with maximum efficiency, i.e. consumes more
fuel. Its power must be
constantly reduced - in the case of solid fuel equipment, this involves
reducing the amount of air entering the combustion chamber. It causes that the fuel does not burn
in its entirety - the visible effect is a large amount of soot, which must be
frequently removed, and this is an embarrassing task. If this is not done, the efficiency of
the boiler decreases even more, the exhaust flow becomes more difficult and the
risk of fire increases.
If the heat source is a
boiler for one of the liquid fuels (gas or fuel oil), then excessive power
shortens the burner's operating cycles and increases the frequency of its
switching on and off. This also
means higher fuel consumption and shorter service life.The same applies to the
heat pump - frequent starting and stopping the compressor increases the power
consumption.
Only condensation
boilers perform well when they work with incomplete power (they are
appropriately constructed for this) - thanks to this, for a long time,
condensation of water vapor from the exhaust gases occurs, which causes the
release of so-called latent heat. As
a result, their efficiency is higher, i.e. they work more economically.
