Storage Boilers

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