Buying guide · plain English4.9258 reviews

Storage or instant?

Both heat water. They cost different amounts, last different lengths, and suit different households. Plain-English comparison from a Singapore-licensed installer — and an honest recommendation for your specific home.

EMA ME05 L1 HDB Licensed Contractor We install both
Storage
Capacity30L
Hot supplyFinite
Best for2-bath
Instant
Capacity
Hot supplyEndless
Best for1-bath
Pick by home size, occupants, and ceiling space
Head-to-head

Side by side, no marketing.

Honest rows from someone who installs both every week.

FeatureStorageInstant
Hot water supplyFinite — tank empties after ~15–25 min for two peopleEndless — heats on demand as water flows through
Upfront unit cost$280 – $1,000 depending on size + brand$180 – $500
Installation cost$120 – $200 (heavier unit, more brackets)$80 – $150 (lighter, simpler)
Electricity bill impactStandby losses — heats water even when you're not using itOnly draws power during shower; cheaper running cost
Hot water pressureStrong — gravity-fed from a full tankDepends on incoming pressure + flow rate
Reliable hot temperatureConstant ~50°C, doesn't vary with usageCan dip if flow rate exceeds heater capacity
Space takenBulky tank (typically 50–80cm tall)Slim — wall-mounted, often above the shower
Lifespan7–10 years (tank lining corrodes eventually)5–7 years (heating coil + thermal cut-off failures)
Best for2+ bathrooms, families of 3+, frequent long showers1-bathroom HDB / studio, 1–2 occupants, quick showers
Sizing recommendations

Pick by household, not by brand.

We size to how you actually use hot water — occupants, bathrooms, shower frequency. Not whichever unit the marketing pushed.

Instant
1–2 occupants · 1 bathroom
Instant heater (5–6 kW)

Continuous hot water for back-to-back showers. Don't overspend on a storage tank you'll never fully use. Compact units fit above most HDB showers.

Either
2–3 occupants · 1–2 bathrooms
25–30L storage OR 6 kW instant

Borderline. Storage gives stronger pressure + constant temperature. Instant saves running cost. If shower frequency is high, lean storage.

Storage
3–4 occupants · 2+ bathrooms
40–50L storage

Two consecutive showers won't run out, plus a kitchen sink draw. Modern storage tanks reheat fast enough (15–20 min) for a third shower.

Storage
5+ occupants OR landed
75–100L storage (or dual-unit setup)

Larger family, or hot water needed at multiple points simultaneously. Sometimes we install two units — one per bathroom — for total isolation.

Quick numbers

Worth knowing before you decide.

Avg shower
35 L
for a 5-min Singapore shower
Tank reheats
15–25 min
from cold to 50°C on a 30L
Instant draws
5–6 kW
needs MCB rated 30–40A
Instant supply
Endless
as long as power + water on
Frequently asked

Common questions.

Still not sure? Let us recommend.

Tell us your home size, number of bathrooms, and how many people live there. We'll come back with one specific recommendation — brand, size, price, install date.

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