Toilet & Bathroom Exhaust Fan Replacement in Singapore: Cost, Sizing & Process

That droning toilet exhaust fan that barely moves air anymore? It's doing more harm than you think — trapped moisture is the number one cause of mould, peeling paint and musty smells in Singapore bathrooms. Here's what replacing a toilet or bathroom exhaust fan costs in 2026, how to pick the right size, and how the installation actually goes.

Exhaust fan replacement cost in Singapore (2026)

A complete swap — fan plus professional installation — typically lands between $140 and $220 all-in, depending on the model.

Signs your exhaust fan needs replacing

• Mirror stays fogged long after a shower
• Rattling, humming or grinding noises (worn bearings)
• Mould keeps returning on the ceiling no matter how often you clean — our bathroom exhaust fan guide explains the moisture math
• The fan spins but you feel no suction at the grille
• It's over 10 years old — motors lose extraction power long before they die outright

Getting the size right

Match the new fan to your existing ceiling or wall opening — that's what keeps a replacement at the basic-installation price. Common sizes in Singapore homes:

• 10cm / 15cm hood series — most HDB toilet ceilings: KDK 10EGKB / 15EKGB
• 17cm ceiling-mounted — KDK 17CUH
• 20cm ceiling-mounted — larger bathrooms and kitchens: KDK 20TGQF

Not sure which you have? Snap a photo of the existing grille and the opening behind it — we'll confirm the right model before you order. The full range is in our exhaust fan collection, and our toilet exhaust fan explainer covers the fundamentals.

What happens during installation

1. Power isolated, old fan and grille removed
2. New fan fitted to the existing opening and wired to the existing point
3. Working test — you check the suction yourself before the installer leaves

Most replacements take about 45 minutes. The old unit is taken away and disposed of for you.

No window opening? Mount it on a custom acrylic panel

Older windows without a built-in fan opening aren’t a dead end. We laser-cut a 5mm acrylic panel to fit your window section, mount the fan on it, and connect everything to your existing power point — from $200 for panels up to 60cm per side (fan unit sold separately). Larger panels or a new dedicated power point are quoted with your booking.

Not sure if your window suits it? Book a measurement site visit ($60) through the same online booking form and we’ll confirm sizing before any cutting.

FAQ

Can you install a fan I bought elsewhere?

Yes — book the installation on its own and have the fan ready at home.

My new fan is a different size from the old opening — possible?

Often yes, but it may need additional works beyond basic installation. WhatsApp us photos and we'll quote first.

Ceiling or window mount — which is better?

Whichever your bathroom was built with. Like-for-like replacement is cheaper, faster and avoids patching works.