Quick answer
Tankless purifiers filter water on demand, so every glass is freshly filtered and the body is slimmer – great for hygiene-conscious homes and exact hot temperatures. Tank purifiers store ready-to-drink cold and hot water, so they are better when many people need chilled water quickly.
What is a tank water purifier?
A tank purifier filters water and stores it in internal cold, room and hot tanks. Examples include the King Top 2 and Grande. Because water is pre-chilled and pre-heated, you can fill several cups or a jug quickly.
What is a tankless water purifier?
A tankless (direct-flow) purifier filters water the moment you press the button and heats it instantly. Examples include the Titan, which delivers up to 100°C instantly, and the slim Kiut, which is just 135 mm wide.
Tank vs tankless at a glance
| Tank | Tankless | |
|---|---|---|
| Freshness | Stored water, kept clean by sterilisation | Freshly filtered every time |
| Cold water | Plenty, ready instantly | Limited or room temperature on some models |
| Hot water | Ready instantly from hot tank | Heated instantly, often exact temperatures |
| Size | Larger | Slimmer |
| Energy | Keeps tanks hot/cold | Heats only when used |
| Best for | Families who drink a lot of cold water | Hygiene-focused homes, baby formula, small spaces |
Which should you choose?
- Love cold water and have a busy household? A tank model like King Top 2 or Grande.
- Preparing baby formula or tea? Tankless Titan with exact hot-water settings.
- Very small space or tight budget? Tankless Kiut (room temperature).
- Want a clean countertop? The under-sink Ace.
Frequently asked questions
Is a tankless water purifier more hygienic?
Tankless models do not store water, so every glass is freshly filtered. Good tank models stay hygienic through regular sterilisation and filter changes.
Do tankless water purifiers give cold water?
Some do, some do not. The Titan offers cold, room and hot; the Kiut is room temperature only.
Which uses less electricity?
Tankless models heat water only when you use it, so they generally use less standby power than keeping a hot tank warm.
Can’t decide between tank and tankless? WhatsApp me how your family uses water and I’ll recommend one.
Written by Alson Chuah, authorised CUCKOO sales partner in Malaysia. Prices and promotions are correct at the time of writing (November 2026) and may change – WhatsApp Alson for the latest offer.