In a small apartment, space is often limited, and every choice of equipment must be carefully considered to optimize space while meeting your needs. The water heater, being an essential appliance for your daily comfort, must be chosen with care to guarantee optimum performance without sacrificing space. In this article, we present the best solutions for installing a water heater in a small apartment.
Instantaneous water heaters: a compact, efficient solution
Why choose an instantaneous water heater?
The instantaneous water heater, also known as the instantaneous flow heater, is an excellent option for small apartments because of its compactness. Unlike storage water heaters, it doesn’t require a storage tank. Water is heated directly on demand, which means you don’t lose space for an additional tank.
Advantages of instantaneous water heaters
- Space-saving: The instant water heater takes up no extra space, as there is no bulky tank. It can easily be installed in a small space, such as under a sink or in a cupboard.
- Hot water on demand: You’ll never run out of hot water, because the unit heats water instantly as it passes through it. This makes it ideal for apartments where hot water use may be sporadic.
- Energy efficiency: Because water is heated on demand, there’s no loss of energy in storing and maintaining heat, unlike storage water heaters.
Disadvantages of instantaneous water heaters
- Limited flow: The main disadvantage of the instant water heater is that it can have a limited flow. If you have several consumption points (shower, kitchen, etc.), it may not be able to supply hot water simultaneously.
- Dependence on incoming water temperature : In winter, cold water entering the unit can be very cold, which can reduce water heating efficiency.
Electric storage water heaters: a compact tank solution
Why choose a storage water heater?
The storage water heater, or cumulus, remains a popular option for small apartments, especially if you have a constant demand for hot water. They are available in compact models that fit neatly into small spaces. Unlike the instantaneous water heater, it has a tank that stores hot water for use when it’s needed.
Advantages of storage water heaters
- Storage capacity: You have hot water available at all times, which is ideal if several people are using hot water at the same time.
- Simple installation: Installation is generally quick and easy, especially if you already have a plumbing system in place.
- Compact models: There are storage water heaters specially designed for small spaces, such as those with a small capacity (between 30 and 50 liters), adapted to the needs of a small apartment.
Disadvantages of storage water heaters
- Space requirements: Even compact models require a little more space than an instantaneous water heater, because they have a tank to install.
- Energy consumption: Water is kept at temperature in the tank, which can lead to energy losses, especially if the water is used less frequently.
Thermodynamic water heaters: an economical and ecological option
Why choose a thermodynamic water heater?
Thermodynamic water heaters are an excellent option for modern apartments concerned with the environment and energy consumption. These models use ambient air to heat water, making them a highly energy-efficient solution. Although more expensive to install, they offer long-term energy savings, which can be a cost-effective choice in a well-insulated apartment.
Advantages of thermodynamic water heaters
- Energy efficiency: thermodynamic water heaters can produce up to 3 to 4 times more energy than they consume, using outside air to heat water.
- Ecological: It uses a renewable energy source, which reduces the carbon footprint of your hot water consumption.
- Lower energy bills: Although it requires a higher initial investment, a thermodynamic water heater will reduce your energy bills over the long term.
Disadvantages of thermodynamic water heaters
- Higher installation costs: Thermodynamic water heaters are more expensive to install than traditional electric models.
- Dimensions: Although more compact than other heating systems, it is still bulkier than an instantaneous water heater and requires adequate space for installation.
Why choose Leader Services to install your water heater?
At Leader Services, we’ll help you choose the water heater best suited to your small apartment. Whether you opt for an instantaneous water heater, a cumulus or a thermodynamic model, our experts will guide you in selecting the best solution according to your hot water needs, the size of your home and your budget.
Discover our services
For more information on the installation, maintenance and replacement of water heaters for small apartments, see our dedicated Leader Services – Water heaters page.
Contact us
If you’d like to receive a personalized quotation for the installation of a water heater, or if you have any questions about the model best suited to your apartment, please contact us via our contact form. Our professionals are at your disposal to offer you solutions tailored to your needs and guarantee optimum comfort.










