
Electric Water Heater
An electric water heater is a storage tank that heats water using electric resistances. It functions as a hot water accumulator, maintaining the desired temperature until needed.

Gas Water Heater
A gas water heater heats water instantly without storing it, using natural gas, butane, or propane. It only activates when a hot water tap is opened.

Boiler
A boiler is a more complete system, providing both domestic hot water (DHW) and home heating through radiators or underfloor heating. It typically runs on gas or diesel.
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Electric Water Heater Features
- Runs on electricity, No gas connection required.
- Storage capacity, Uses a tank to store hot water.
- Thermal insulation, Keeps water hot, but once emptied, reheating takes time.
- Easy installation, No need for a gas connection.
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✅ Easy installation. Suitable for any home with an electrical connection.
✅ Perfect for gas-free areas. No emissions or special ventilation needed.
✅ Lower maintenance. Requires less upkeep than gas water heaters and boilers.
❌ Limited hot water supply. Once the tank is empty, reheating takes time.
❌ Higher electricity consumption. Compared to gas water heaters.
❌ Space requirement. Needs adequate space for the storage tank.
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Gas Water Heater Features
- Works with gas (natural, butane, or propane).
- No storage: heats water instantly when needed.
- There are atmospheric and sealed models (sealed models are safer and more recommended).
- Requires gas installation and smoke outlet.
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✅ Unlimited hot water, as it heats instantly and doesn’t rely on a tank.
✅ More efficient than an electric water heater, as it only consumes energy when in use.
✅ Lower operating cost if gas is cheaper than electricity.
❌ Requires gas installation and, in some cases, a smoke outlet.
❌ Temperature fluctuations may occur if multiple taps are used simultaneously.
❌ Maintenance required: Burners can accumulate limescale over time. -
Boiler Features
- Dual function: domestic hot water and heating.
- Available in condensing, gas, oil, and biomass models.
- Condensing boilers are the most efficient and recommended today.
- Higher initial investment but greater long-term efficiency.
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✅ Ideal for homes with radiator heating.
✅ Higher energy efficiency with condensing models.
✅ Long-term savings on energy consumption.
✅ Can be combined with renewable energy sources (solar thermal).
❌ More expensive than a water heater or gas heater.
❌ More complex installation, requiring gas connection and smoke outlet.
❌ Requires maintenance to ensure efficiency.
What Should You Choose?
When to Choose an Electric Water Heater
🔹 If you don’t have access to gas in your home.
🔹 If hot water consumption is moderate and you can adjust to the heater’s capacity.
🔹 If you're looking for a safe and easy-to-install option.
When to Choose a Gas Water Heater
🔹 If you have access to gas and want an efficient option.
🔹 If hot water consumption is high or there are multiple people in the house.
🔹 If you prefer instant hot water without relying on a tank.
When to Choose a Boiler
🔹 If you need both hot water and home heating.
🔹 If consumption is high and you want maximum efficiency.
🔹 If you have radiators or underfloor heating and want to use a single system for everything.
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