Are Daikin ducted filters genuine Daikin parts?

No — and no brand makes branded ducted filters. A ducted return-air filter is sized to your grille and chosen to suit your duct design, not the AC brand. For ducted systems we recommend and supply the AirClean V-pleat filter, made to suit your grille.

Why recommend AirClean filters if they aren’t the cheapest?

Because they perform. Cheaper flat-panel filters exist, but in our experience they don’t deliver the same protection or indoor air quality. The AirClean V-pleat has over 2.5 times the surface area of a panel filter, traps far smaller particles, is Sensitive Choice approved, and keeps the unit running efficiently.

G4 is the filter’s efficiency classification (rated to EN779:2012 and AS1324.2), not the product name. The product is the AirClean V-pleat disposable filter, which carries the G4 rating.

How do I measure my ducted filter?

Measure your existing filter outside edge to outside edge — these filters aren’t a universal size, so the exact measurement matters. There’s a measuring guide on the filter product page. Enter your size when ordering, or send it to us.

Are Daikin wall-split filters genuine?

Yes — wall-split filters clip into the indoor head and are genuine Daikin model-specific parts, including the washable air filter and, on applicable models, the titanium apatite deodorising air-purifying filter. Give us your model number for the right one.

How often should I replace my filter?

As a guide, a ducted disposable filter is changed around every 12 months at home, or every 3–6 months in an office or dusty setting. A wall-split’s washable filter should be cleaned more often. A blocked filter causes weak cooling, frozen coils and higher running costs.

Daikin Air Filters: Ducted vs Split, Explained

A clean filter is the most important bit of air conditioner maintenance there is. It protects the air you breathe and keeps the system breathing freely, which protects performance and the parts behind it. But “Daikin filters” actually covers two different things — the filter for a ducted system and the filter for a wall-split — and they work quite differently. This guide explains both, what we recommend and why, and how to order the right one.

Ducted Systems: Not a Branded Filter

Here’s the honest part many suppliers won’t spell out: for a ducted system, the return-air filter is not a branded item — no manufacturer makes a “genuine” ducted filter, Daikin included. The filter sits in your return-air grille, and the right size and type are set by that grille and your duct design, not by the brand of your air conditioner. So a ducted filter is never “genuine Daikin”; it’s a correctly-sized, correctly-rated filter for your return-air opening. That leaves a real choice about quality — which is where our recommendation comes in.

What We Recommend for Ducted Systems — and Why

For ducted systems we recommend, and supply, the AirClean V-pleat disposable filter. We don’t recommend it because it’s the cheapest — it isn’t. You can buy cheaper flat-panel filters, but in our experience they don’t deliver the protection or the indoor air quality the AirClean filter does. We recommend it because of what it actually does:

Its V-pleat design has over 2.5 times the surface area of a traditional flat panel, and is designed to trap pollutants over ten times smaller than a panel filter can.
It filters the small pollutants you can’t see — pollen, lint, mould spores and dust mites — the kind that trigger allergies, asthma and hay fever.
It’s approved under the National Asthma Council Australia’s Sensitive Choice program and carries the blue butterfly symbol.
By keeping the indoor coil cleaner, it helps the system run efficiently, extends the life of the unit, and reduces energy use.
It’s Australian designed and made, and disposable — a clean filter every time, rather than a washed one that never fully recovers.

A note on the name: “G4” isn’t the product — it’s the filter’s efficiency classification (rated G4 to EN779:2012 and AS1324.2). The product is the AirClean V-pleat disposable filter, which carries that G4 rating.

How to Order a Ducted Filter: Measure First

Because AirClean filters are made to suit your grille, they aren’t a universal size — so getting the measurement right is the most important step. We sell them as a custom item: you give us the size, we place the order, and the filter is made and shipped to you. Measure your existing filter outside edge to outside edge — measuring the opening or the old filter incorrectly is the most common ordering mistake. There’s a simple measuring guide on the filter product page. Once you have your measurement, enter it when you order, or send it to us and we’ll take care of the rest. Two practical points: because these filters are custom-made and shipped directly from the manufacturer, they’re not held in our warehouse and can’t be collected, and same-day dispatch doesn’t apply. And because they’re made to your size, measure carefully — a custom filter can be returned only if what we supplied differs from your order.

Wall-Split Systems: These Filters ARE Genuine Daikin

Wall-split systems are different. The filter clips into the indoor head and is a genuine Daikin part, made to fit that specific model. There’s the washable air filter that comes with the unit, and on many models the titanium apatite deodorising air-purifying filter — a washable filter that traps fine dust and absorbs odours such as tobacco and pets. For these, you do want the genuine, model-matched part: it fits correctly and maintains the airflow the unit was designed around. We stock genuine Daikin wall-split filters and treat them like any other genuine Daikin spare part: same-day dispatch on stocked items ordered before 1:00 PM AEST. To get the right one, just give us your model number.

Why a Clean Filter Matters

A blocked filter is behind a surprising number of “faults”: weak cooling, a frozen indoor coil, water dripping on thaw, and higher running costs as the system works harder to pull air through. Replacing or cleaning the filter on schedule is the cheapest preventive maintenance there is — and it protects the expensive parts downstream. As a rough guide, a ducted disposable filter is typically changed around every 12 months in a home, and every 3–6 months in an office, commercial or dusty setting. A wall-split’s washable filter should be cleaned more often.

Daikin Filter FAQs

Order the Right Filter

Whichever system you have, we’ll get you the right filter. For a ducted system, measure outside edge to outside edge and order your custom AirClean V-pleat filter. For a wall-split, give us your model number for the genuine Daikin filter. Browse our Filters range, call 1300 904 554, or email daikin@nationalacparts.com.au.

ARC licence holder? Enter your promo code and licence number at checkout for your applicable ARC discount on genuine Daikin spare parts — note the ARC discount doesn’t apply to the AirClean V-pleat filter, as it isn’t a Daikin product.