Buffer tank with 3 heat exchangers Cordivari Eco-Combi 600 liters with 1 inox and 2 steel heat exchangers. The stainless steel pipe is used to heat domestic hot water

Buffer tank with 3 heat exchangers

Buffer tank volume: 600 liters
Actual volume: 560 liters
Diameter with insulation: 750 mm
Height: 1870 mm
Insulation: high-quality thermal insulation, ecological polyurethane hard foam
Weight: 200 kg
Stainless heat exchanger surface area: 5.3 m2
Stainless heat exchanger capacity: 31 liters
Lower heat exchanger surface: 2.1 m2
Lower heat exchanger capacity: 13 liter
Upper heat exchanger surface: 1.3 m2
Upper capacity of heat exchanger: 8 liters
Maximum operating pressure of tank: 3 bar 99 °C
Maximum operating pressure of heat exchangers: 12 bar 110°C
Maximum operating pressure of HMV rust-threaded heat exchanger: 6 bar

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Buffer tank 1 inox and 2 steel heat exchangers

The inox heat exchanger is heated by the hot water in the tank.
The material of the heat exchanger is stainless steel 316L.
This ribbed stainless steel pipe has a particularly large surface to handle even fast-flowing water to heat up.
In the buffer tank itself, it stores the water that circulates in your heating system and that is e.g. the boiler heats.

You can connect the solar collector or heat pump to the lower heat exchanger.
The solar collector or connect the heat pump system
with a heat exchanger, because it contains a different liquid, e.g. antifreeze can circulate.

The 2nd upper heat exchanger e.g. it is used for heating with a pellet or gas boiler.
It is not worth heating the entire buffer tank from below with a gas or pellet boiler, these boilers can quickly produce the hot water, i.e. you don't need such a large amount of hot water.
The solar collector can only provide hot water periodically to prepare,
therefore it is worth storing it in as much as possible, that is why the heat exchanger is at the bottom.

If you want to heat the domestic hot water itself, i.e. the hot water flowing from the tap, in the tank itself and do not want to use the hot water for heating, choose an indirect storage tank with a heat exchanger, a boiler, they are enamelled, so it's clean, the drinking water stays in them!