Hot showers are a daily comfort, and choosing the right water heater saves both money and trouble.
The short answer
- One shower, small bathroom, one or two people: an instant water heater.
- Several bathrooms or a family showering one after another: a storage water heater.
Comparison
| Instant | Storage | |
|---|---|---|
| How it heats | As water flows | Heats and stores a tank |
| Waiting time | None | Tank must heat up first |
| Serves | Usually one outlet | Several taps |
| Space | Very compact | Needs wall space for the tank |
| Best for | Small households | Families |
Sizing a storage heater
| Household | Tank size |
|---|---|
| 1–2 people | 30–50 litres |
| 3–5 people | 50–80 litres |
| 6 or more | 100 litres |
Safety first
Water and electricity are a dangerous mix, so installation matters more than the brand.
- Have a qualified electrician install it, with proper earthing.
- Choose models with earth leakage protection (ELCB/RCD).
- Make sure storage heaters have a pressure relief valve.
- Never use a heater with damaged cables or signs of burning.
Saving electricity
- Switch storage heaters on a while before showers instead of all day.
- Set the thermostat to a comfortable, not maximum, temperature.
Browse water heaters in our home appliances store or message us on WhatsApp for advice.
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Published October 10, 2026 · 2 min read