Comfortzone Expansion Vessel

An expansion vessel for a heat pump is an important component that plays a crucial role in maintaining optimal and efficient operation of the heat pump system. By understanding why it is important to purchase an expansion tank and how it works, you can make informed decisions and ensure that your heat pump installation operates at its best.


Why should you buy an expansion vessel for a heat pump?

When a heat pump works to heat or cool your home, it creates pressure changes and temperature variations in the system. An expansion tank is used to manage these pressure changes and ensure that the heat pump operates efficiently and safely. Here are some key reasons why you should consider buying an expansion tank for your heat pump:

Pressure relief: As the water level and pressure in the heating system increase due to heating, the expansion tank provides a space for excess liquid to expand. This reduces the risk of the pressure in the system becoming too high and potentially damaging components or causing leaks.

Thermal relief: Since a heat pump produces heat by transferring energy from one source to another, temperature variations can occur in the system. An expansion tank helps compensate for these variations by allowing the fluid to expand and contract without affecting the performance or lifespan of the system's components.

Safety: By having an expansion tank installed in your heat pump system, you reduce the risk of overpressure damage or other unwanted incidents. It helps create a safe and reliable operating environment for your heat pump.


How does an expansion tank work?

An expansion vessel consists of a pressure-tight vessel that is connected to the heat pump system. Inside the vessel, there is a separate air chamber and a diaphragm bladder. As the pressure increases in the system, the liquid expands into the expansion tank and compresses the air in the chamber at the bottom. Similarly, when the pressure decreases, the liquid contracts, and the bladder returns to its original form.

This process allows the liquid to expand and contract without affecting the pressure in the rest of the heat pump system. The diaphragm in the expansion tank separates the liquid from the air and prevents them from mixing. This ensures that the system continues to operate reliably and efficiently under varying operating conditions.


When should you replace an expansion vessel?

Just like any component, an expansion tank can wear out or become defective over time. If you notice signs of leakage, air or waterlogging, or pressure drops in the heat pump system, it may indicate that the expansion tank needs to be replaced. It is important to regularly inspect and maintain the expansion tank to ensure its optimal functioning.

In conclusion, an expansion tank is an important part of a heat pump system that helps manage pressure changes and temperature variations. By investing in a high-quality expansion tank and ensuring proper operation, you can maximize the performance, safety, and lifespan of your heat pump.


  1. Expansion vessel 12 L Flamco (EX-High)

    Expansion vessel 12 L Flamco (EX-High)
    220.50€ incl. VAT 176.40€ excl. VAT Add to Cart
  2. Expansion vessel 25L Flamco (EX-Low)

    Expansion vessel 25L Flamco (EX-Low)
    380.84€ incl. VAT 304.67€ excl. VAT Add to Cart
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