Proper home heating is a very important topic that should be considered at the construction stage and when choosing a home design. What is a heat exchanger and what role does it play in a heating system?
How does a heat exchanger work?
A heat exchanger is a special device that allows heat exchange between fluids of different temperatures. The essence here is the phenomenon of convection, or the transfer of energy. In heating systems, a fluid at a high temperature transfers its energy to a wall or pipe in which there is a fluid at a lower temperature.
A heat exchanger in any system is a special mechanical device that takes part in heat exchange. In practice, we can distinguish between ground and plate heat exchangers, and which variant will be used depends on the design of the heating installation.
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Where are heat exchangers used?
The heat exchanger solution is used in buildings with a recuperation system, in which air masses flow between plate heat exchangers, arranged parallel to each other. In this way, special ventilation channels are created, allowing air to flow.
Which heat exchanger should you choose?
The most important issue is the selection of the right heat exchangers , which will allow the entire system to operate effectively. It is necessary to pay attention to the parameters and specifics of a given project. The best solution is to choose proven and recommended models. What proposals are worth considering?
Onnline Mega Solar bivalent exchanger with two coils
T 
o one of the valued products, which was prepared with the idea of using the convection phenomenon in heating installations, in which there are two heat sources. It allows to prepare and store hot utility water. The product has all the necessary certificates, covered by the manufacturer's warranty, however, it is necessary to remember to regularly replace the magnesium anode. A big advantage is the housing, which can be easily and conveniently dismantled for transport. This model is equipped with a temperature indicator.
The Onnline Mega Solar bivalent heat exchanger is a 300 l tank made of steel, with an energy class of C.
Galmet 200l SGW(S)B TOWER BIWAL bivalent exchanger with two spiral coils
SGW(S)B Tower Biwal is a free-standing heat exchanger model, which is characterized by excellent quality and solid workmanship. Enameled tank, 
for which insulation was made of hard polyurethane foam. A great advantage of the product is excellent anti-corrosion protection, for which a wet-applied ceramic enamel was used. The bivalent exchanger allows for simultaneous connection of up to 3 heat sources. Depending on the heating needs of the building, the exchanger is also available in other sizes: 300l, 400l, 500l, as well as 720l and 1000l.
Domestic hot water exchanger with spiral coil, standing SGW(S) Tower Grand 200L
Another recommended model is a standing domestic hot water exchanger with a spiral coil, SGW(S) Tower Grand 200L. Its characteristic feature is an enlarged spiral coil, adapted to work with heat pumps. The exchanger allows for heating and storing domestic hot water. The tank insulation is made of special, hard polyurethane foam, on which an additional, soft layer made of skay is attached.
The SGW(S) Tower Grand exchanger is equipped with two magnesium anodes, which provides even better protection against corrosion. This exchanger variant is also available in the following versions: 160l with a 1.4m coil, 250l with a 2.4m coil, 300l with a 2.7m coil.
Heat pump exchanger Galmet SGW(S) Maxi 250L with spiral coil 2.9m2
The SGW(S) Maxi 250L heat pump exchanger with a 2.9m2 spiral coil is also very popular. Designed to perfectly use the possibilities offered by heating based on a heat pump. The tank is insulated with a polyurethane egg. Its high density allows for maximum reduction of heat loss. The whole is covered with a soft PVC foil. The product is perfectly protected against corrosion, thanks to magnesium anodes, which are responsible for sealing micro-cracks. The whole is preserved with ceramic enamel.
Check out the tanks, exchangers and buffers at the Onninen wholesaler