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Storage Boilers

More domestic hot water in a short time thanks to the storage tank, ideal for large families and multiple bathrooms. Find the best brands ready to ship, from 1029 to 3759 euros, with dedicated support.
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What is a storage boiler?

The storage boiler includes a tank that keeps a reserve of domestic hot water always ready to use. Unlike instantaneous boilers, which heat the water only at the moment of draw-off, storage makes it possible to deliver more hot water in a short time and at a stable temperature. It is the ideal solution for large families, homes with several bathrooms or simultaneous draw-offs.

How many litres of storage do you need?

The tank capacity is chosen based on the number of people and draw-off points. As a reference:

  • from 40 to 60 litres: suited to couples and a single bathroom.
  • from 60 to 80 litres: ideal for families of 3 to 4 people.
  • over 80 litres: designed for large families or multiple bathrooms.

A well-sized tank avoids running out of hot water during periods of higher demand.

How much output in kW is needed?

The output in kW determines how quickly the boiler heats the water and handles the heating. The most common sizes range from about 24 to 32 kW and above, depending on the area to be heated and the amount of hot water required. Matching the right output to the storage volume ensures constant comfort without waste.

Why choose storage instead of instantaneous?

The instantaneous boiler is compact and suited to modest consumption, but it can struggle with simultaneous draw-offs. Storage, thanks to the reserve in the tank, keeps the temperature stable even when several taps are opened at once. This translates into showers without fluctuations and greater comfort for the whole family.

The best brands available

You'll find the leading manufacturers in the sector, with official warranty and available spare parts: Ariston, Baxi, Ferroli, Chaffoteaux, Bosch and Hermann Saunier Duval. Prices start at around 1029 euros and reach the highest-capacity models, for every budget.

Installation and support

Installing a storage boiler requires room for the tank and should be entrusted to a qualified technician, who checks the flue, the draught and the water connections. Relying on a professional ensures safety, efficiency and compliance with regulations, as well as the full validity of the warranty.

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Frequently asked questions

What is the advantage of a storage boiler?
The tank keeps a reserve of domestic hot water always ready, so you can deliver more hot water in a short time and at a stable temperature, even with several taps open at once.
How many litres of storage does a family need?
For a family of 3 to 4 people, tanks of 60 to 80 litres are suitable. For couples with a single bathroom, 40 to 60 litres are enough, while for large families or multiple bathrooms it is worth going above 80 litres.
How much output in kW should the boiler have?
The most common sizes range from about 24 to 32 kW and above, depending on the area to be heated and the hot water required. Matching the output to the storage volume ensures constant comfort without waste.
Is a storage or an instantaneous boiler better?
Storage is ideal when there are simultaneous draw-offs or several bathrooms, because the reserve in the tank keeps the temperature stable. The instantaneous boiler remains more compact and suited to modest consumption.
How much space is needed for a storage boiler?
Compared with an instantaneous boiler, more space is needed to house the tank. It is worth assessing the footprint when choosing and relying on a technician for correct positioning.
Must the installation be done by a technician?
Yes, the installation requires a qualified technician who checks the flue, the draught and the water connections. This ensures safety, efficiency and the full validity of the warranty.
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