Quick answer — which one suits you?
- Best 2-in-1 air purifier and dehumidifier: Sharp DW-T30FA — 30L/day, HEPA and activated carbon filters, Plasmacluster ions.
- Best for big rooms and laundry, no purifier needed: Sharp DW-T30HA-W — 30L/day in a 248mm-deep cabinet.
- Best for bedrooms and studies: Sharp DW-RN23A-W — 23L/day, compact, 14.9kg.
- Best made-in-Japan option with air-quality display: Mitsubishi BIKUKAN — 26, 28 or 38L/day with PM2.5/PM1.0 display.
There are plenty of dehumidifiers on the shelves in Australia and New Zealand. This guide is narrower: it covers the Japanese-brand dehumidifiers we sell at OurDearHome, what each one does well and who it suits. We are a retailer, so we have kept to the facts in each manufacturer's specifications and pointed out where another type of machine may serve you better.
How we compared them
Capacity at 30°C/80% RH. CHOICE says manufacturers usually rate water removal at 30°C and 80% RH, and Mitsubishi Electric Australia rates its local range the same way. Our machines come from Hong Kong, where the energy label uses a cooler 26.7°C and 60% RH, so the box shows a smaller number for the same machine. We quote both below.
Recommended room size. Each manufacturer quotes a room area based on the JEMA (Japan Electrical Manufacturers' Association) standard.
Air purification. Which filters each model uses, and whether it can purify on its own with the compressor off.
Cold-weather range. The lowest room temperature each model is designed to run in.
At a glance
| Sharp DW-T30FA | Sharp DW-T30HA-W | Sharp DW-RN23A-W | Mitsubishi BIKUKAN | |
|---|---|---|---|---|
| Capacity (30°C/80% RH) | 30L/day | 30L/day | 23L/day | 26 / 28 / 38L/day |
| HK Energy Label (26.7°C/60% RH) | 18.5L/day | 18.5L/day | 13L/day | 14.2 / 15.5 / 23L/day |
| Room size (JEMA) | 39–77 m² | 39–77 m² | 27–54 m² | 39–59 / 43–65 / 64–96 m² |
| Air purifying filters | HEPA + activated carbon (up to 10 years) | Washable pre-filter only | Filter (no purifier mode) | Air purifying filter + activated carbon |
| Ions | Plasmacluster | Plasmacluster | — | — |
| Air-quality display | PM2.5 | Humidity | Humidity | PM2.5, PM1.0, odour |
| Tank | 4.5L | 4.5L | 3.8L | 5.5L |
| Continuous drainage | Yes | Yes | Yes | Yes |
| Room temperature range | 4–38°C | 4–38°C | 5–35°C | 5–35°C |
| Made by | Sharp, a Japanese brand | Sharp, a Japanese brand | Sharp, a Japanese brand | Mitsubishi Electric, made in Japan |
Sharp DW-T30FA — best 2-in-1 air purifier and dehumidifier
Sharp DW-T30FA | 3-in-1 HEPA Air Purifier & Dehumidifier
30L/day at 30°C/80% RH · HEPA + activated carbon filters · Plasmacluster ions · 39–77 m²
View Sharp DW-T30FAWho it suits: households that want one machine for damp in winter and dust, pollen or odours the rest of the year — especially open-plan living areas.
The DW-T30FA is a three-in-one unit: a dehumidifier, an air purifier and a Plasmacluster ion generator. It removes up to 30L/day at 30°C/80% RH (18.5L/day on the Hong Kong Energy Label) and is recommended for rooms of 39–77 m².
- Three-stage filtration: washable pre-filter, HEPA filter and activated carbon deodorising filter. Sharp rates the HEPA and carbon filters for up to 10 years.
- Independent air purify mode with the compressor off, so you can keep using it once the air is dry. Sharp quotes an air purifying area of 37 m².
- Dust, odour, temperature and humidity sensors, with a display showing humidity, temperature and PM2.5 level.
- Laundry modes with a 140° wide-angle airflow, plus drying attachments for shoes and wardrobes.
- Runs from 4°C to 38°C. 359 × 665 × 303 mm, 18.7kg. Available in Cream White and Charcoal Grey.
Dual louvres spread airflow for indoor laundry drying.
you only need dehumidifying, or space is tight — the DW-T30HA-W below is slimmer.
Sharp DW-T30HA-W — best for large rooms and laundry, without the purifier
Sharp DW-T30HA-W | 2-in-1 Antibacterial Dehumidifier
30L/day at 30°C/80% RH · slim 248mm depth · Plasmacluster ions · 39–77 m²
View Sharp DW-T30HA-WWho it suits: families who dry a lot of washing indoors or need to keep a large living area dry, and don't need HEPA filtration.
The DW-T30HA-W shares the DW-T30FA's 30L/day capacity (18.5L/day on the Hong Kong Energy Label) and 39–77 m² room rating, but leaves out the HEPA and carbon filters. That makes it slimmer at 248mm deep and lighter at 17.2kg.
- Plasmacluster ions for treating the air while it dehumidifies.
- Laundry (Auto / Spot) and clothes-deodorising modes, 140° wide-angle airflow with four swing settings, and drying attachments for shoes and wardrobes.
- Sharp lists a direct-drive inverter motor among its features.
- 4.5L tank with auto-stop, or continuous drainage. Runs from 4°C to 38°C.
hay fever, dust or smoke are part of the reason you're buying — the DW-T30FA adds HEPA and carbon filtration.
Sharp DW-RN23A-W — best for bedrooms and studies
Sharp DW-RN23A-W | Compact Dehumidifier
23L/day at 30°C/80% RH · compact 14.9kg · direct-drive inverter motor · 27–54 m²
View Sharp DW-RN23A-WWho it suits: smaller households, bedrooms, studies and apartments of up to about 54 m² where a compact, lighter machine is easier to live with.
The DW-RN23A-W removes up to 23L/day at 30°C/80% RH (13L/day on the Hong Kong Energy Label) and is recommended for 27–54 m². At 355 × 567 × 259 mm and 14.9kg, it is the smallest and lightest model in this guide.
- Sharp lists a direct-drive inverter motor among its features.
- Dehumidify and Laundry modes, with a humidity setting from 40% to 70% and a continuous mode.
- 3.8L tank with full-tank auto-stop, or continuous drainage through a hose.
- 1–8 hour off timer and child lock. Runs from 5°C to 35°C.
you want air purification, or need to dry a large open-plan space.
Mitsubishi BIKUKAN — best made-in-Japan option with an air-quality display
Mitsubishi BIKUKAN | Air Purifying Dehumidifier
Made in Japan · 26 / 28 / 38L per day at 30°C/80% RH · PM2.5 / PM1.0 display · air purifying + activated carbon filters
View Mitsubishi BIKUKANWho it suits: buyers who want a Japanese-made Mitsubishi Electric dehumidifier that also purifies and deodorises, and who like seeing their air quality at a glance.
The BIKUKAN series is made in Japan and comes in three capacities:
| Model | 30°C/80% RH | HK Energy Label | Room size (JEMA) |
|---|---|---|---|
| MJ-EH142JV-H | 26L/day | 14.2L/day | 39–59 m² |
| MJ-EH155JV-H | 28L/day | 15.5L/day | 43–65 m² |
| MJ-EHV230JV-H | 38L/day | 23L/day | 64–96 m² |
- Dehumidifies, purifies and deodorises. Smart Auto mode switches between dehumidifying and air purifying by itself, and Smart Flaps route air through the air purifying filter and activated carbon filter when purifying.
- PM2.5, PM1.0 and odour levels on the display, driven by a dust sensor and an odour sensor.
- 5.5L tank — the largest here — or continuous drainage, plus a Dry Inside function.
- The 38L MJ-EHV230JV-H is the inverter model in the series.
- Runs from 5°C to 35°C.
The BIKUKAN control panel and display.
you specifically want a HEPA filter — the Sharp DW-T30FA is the HEPA option in our range.
Availability varies by capacity; please check the product page for current stock.
Our titles quote capacity at 30°C/80% RH, the basis most Australian and New Zealand listings use. The smaller Hong Kong Energy Label figure (26.7°C/60% RH) describes the same machine.
Is a 2-in-1 air purifier and dehumidifier worth it?
A combined machine makes sense when the same room has both problems at different times of year: damp and condensation in winter, pollen and dust in spring. Three things to check before you buy:
Can it purify with the compressor off? The Sharp DW-T30FA has an independent air purify mode, and the BIKUKAN's Smart Auto mode switches between dehumidifying and purifying.
Which filter does it use? "Air purifying" can mean different things. The DW-T30FA uses a HEPA filter plus activated carbon; the BIKUKAN uses an air purifying filter plus activated carbon.
Is the room the right size for both jobs? A machine's dehumidifying area and air purifying area are often different. For example, Sharp quotes 39–77 m² for dehumidifying but 37 m² for air purifying on the DW-T30FA.
For more on allergies, mould smells and PM2.5, see our air purifying dehumidifier guide.
A note on winter
All of these are compressor dehumidifiers. Like every compressor model, they collect less water as a room gets colder. Consumer NZ's winter-condition tests (8–16°C) found dehumidifiers removed less than 30% of their claimed capacity on average, and Consumer NZ suggests using a dehumidifier together with your heat pump, wood burner or electric heater in colder months. If the room you need to dry is unheated and often below about 12°C, a desiccant dehumidifier may suit you better — we don't sell desiccant models. Our guide Compressor vs Desiccant Dehumidifiers for Australian & NZ Winters explains the trade-offs.
Why buy from OurDearHome?
What we offer is a choice of Japanese-brand models and features you can compare above: HEPA and Plasmacluster in one Sharp machine, a compact 23L Sharp, and the made-in-Japan BIKUKAN series with its PM2.5/PM1.0 display. Each unit ships with a free Type I plug adapter for Australia and New Zealand.
1-year limited warranty from OurDearHome for Australian and New Zealand deliveries — in addition to your rights under the Australian Consumer Law. See our AU/NZ warranty page.
Browse all our dehumidifiers.
Comparing Japanese-brand dehumidifiers for your home?
See capacities at 30°C/80% RH, room sizes and air purifying options side by side.
Browse DehumidifiersFAQ
Q: What is the best 2-in-1 air purifier and dehumidifier you sell?
A: For HEPA filtration, the Sharp DW-T30FA: it combines a 30L/day dehumidifier (at 30°C/80% RH) with HEPA and activated carbon filters, Plasmacluster ions and an independent air purify mode. If you prefer a Japanese-made option with a PM2.5/PM1.0 display, look at the Mitsubishi BIKUKAN series, which uses an air purifying filter and activated carbon filter.
Q: Why does the box say 13L or 18.5L when your page says 23L or 30L?
A: The smaller number is the Hong Kong Energy Label rating at 26.7°C and 60% RH. The larger number is measured at 30°C and 80% RH, the basis most Australian and New Zealand listings use. Both describe the same machine.
Q: Which dehumidifier is best for a bedroom?
A: For bedrooms and studies up to about 54 m², the Sharp DW-RN23A-W is the most compact model we sell (14.9kg, 259mm deep) and removes up to 23L/day at 30°C/80% RH.
Q: Do these dehumidifiers work in winter?
A: Yes, within their operating range (4–38°C for the Sharp DW-T30 models, 5–35°C for the DW-RN23A-W and BIKUKAN). Like all compressor dehumidifiers, they remove less moisture as the room gets colder, so they work best in heated rooms.
Q: What warranty do I get?
A: 1-year limited warranty from OurDearHome for Australian and New Zealand deliveries — in addition to your rights under the Australian Consumer Law. Details are on our AU/NZ warranty page.
