Published 18 May 2026 · 6 minute read · by the Mealdesk crew
We install both types weekly, so we have no horse in this race. What we do have is a strong opinion: most people buy on sticker price, then spend years paying for the wrong choice through their utility bill or a lukewarm shower. Here is the conversation we have at kitchen tables, in full.
The case for electric
Electric instant heaters dominate Malaysian bathrooms for good reason. They are compact, cheap to buy (decent units from RM300), and installation is straightforward wherever a properly protected circuit exists. There is no flue, no gas line, no combustion happening in your bathroom. Modern units with built-in ELCB and thermal cut-outs are, frankly, very hard to hurt yourself with — provided the earthing and breaker behind them are done right.
The trade-offs: heating water with a resistance element is the most expensive way to make heat, and a 3.6kW unit delivers a gentle shower, not a hotel cascade. Storage models solve the flow problem but pay for it in standby losses — they keep 40 litres hot around the clock whether you shower or not.
The case for gas
A gas instant heater delivers roughly double the hot-water flow of a typical electric unit, and LPG per unit of heat costs meaningfully less than TNB tariff electricity. Families of five who queue for the bathroom every morning notice the difference immediately — both in the shower and on the bills.
The trade-offs are real, though. The unit must vent combustion gases safely, which rules out enclosed bathrooms without modification. You take on cylinder swaps or piped-gas dependency, annual servicing is not optional (a dirty burner is both inefficient and dangerous), and good installation costs more upfront.
Our honest rules of thumb
- One or two people, one bathroom: electric instant. Simple, safe, done.
- Big family, morning rush hour: gas instant if your bathroom can vent it, otherwise a storage electric sized properly.
- Rain-shower head dreams: neither budget option will satisfy — you need gas or a large storage unit, full stop.
- Rental property: electric instant, every time. Tenants will not service a gas unit, and you don't want to depend on them doing so.
Whichever you choose, the boring part decides your safety
Heater accidents in Malaysia almost never come from the heater. They come from missing earth wires, bypassed ELCBs and cable runs one size too thin. Whoever installs your unit, insist they test the earth continuity and trip the ELCB in front of you before accepting the job as finished. (Our own checklist for this is on the water heater service page.)
Still torn? Send us a photo of your bathroom and your TNB bill — we'll tell you which side of this fence your house sits on, no charge for the opinion.