Instant Water Heaters Singapore | Ariston, 707

Instant water heaters make sense for most HDB and condo bathrooms because they only heat water as you use it, so there’s no standby tank taking up wall space or wasting electricity keeping water hot all day. The main thing to check is power rating. A higher kW rating heats water faster and can support a rain shower’s flow rate, while a lower kW unit is fine for a handheld shower or a basin tap.

We carry instant water heaters from Rinnai, Ariston, Champs, Mistral, 707 and Protek, in wattages that suit a compact HDB bathroom or a larger condo setup. Rinnai has the most models in here. Its Ore, Crystal and Hydroto series each come with a handheld shower or a rainshower. If you’re upgrading from an older unit, check your existing electrical wiring can handle the new heater’s power draw. Some higher-powered models need a dedicated circuit, which your electrician can confirm.

Installation matters as much as the unit itself. A poorly mounted heater or the wrong pipe fitting can lead to leaks or inconsistent temperature, so we’re happy to walk you through what your bathroom setup needs.

Get expert advice in-store at our Lavender or Tampines showroom, with islandwide delivery, guidance included as standard, and installation available as a paid add-on if you would rather we fitted it. Where several people shower back to back, the storage heaters keep a tank ready instead, and the rain shower sets want sizing against whichever you choose. Both types sit under heaters.

Frequently asked questions

How does an instant water heater work?

It heats water as it passes through, so there is no tank and no waiting. Hot water carries on for as long as the shower runs, which is why it suits a bathroom used back to back in the morning.

How much space does one need?

Far less than a storage heater. A compact unit on the bathroom wall is the whole installation. That is the main reason it is the common choice in a compact HDB bathroom.

Will it work with a rain shower head?

A wide rain head spreads the same water over a larger area, so head size and heater are worth choosing together. Tell the team which heater you have or are considering and they will work through head size with you.

How much does an instant heater cost?

From $129, across Rinnai, Champs, Ariston and Mistral.

Can Homus install the heater?

Advice on siting and what your bathroom needs comes with the purchase, and installation is available as a paid add-on if you would like us to do the job.