Best Dehumidifiers Australia 2026:
Four Picks Judged on Litres, Drains and Running Cost

Disclosure: This article contains affiliate links to amazon.com.au. If you buy through one of these links iFix may earn a small commission at no extra cost to you. It doesn't change which products we recommend. We focus on what actually lasts based on 16 years of repair-shop experience.

Why a repair tech cares about the humidity in your lounge room

Every winter on the Central Coast the same thing happens. The house is shut tight, the heater runs, two people shower, the clothes airer sits in the spare room because it is raining again. By 7am the windows are streaming. That water was in the air at 9pm, and the air gave it up the moment it touched the coldest surface in the room. Glass is usually the coldest surface. It is not the only one.

A laptop that was shut down overnight is cold. So is the back of a TV, the chassis of a games console, the aluminium body of a phone on a windowsill. Damp air condenses onto those surfaces exactly as it does onto the glass, in smaller amounts and in places you cannot see. Over one night that is nothing. Over a winter of nights it is a repeated wetting and drying cycle on a printed circuit board, and that is precisely how corrosion starts. I have written up the mechanism on our water damage explained page, but the short version is that copper traces, solder joints and connector pins grow green and white deposits, resistance creeps up, and one day a keyboard row stops or a HDMI port goes intermittent. The customer swears the thing never got wet. They are right. It got damp, which is slower and harder to prove.

We see this at the Erina workshop every August: MacBooks with corrosion around the keyboard flex, TVs with green fuzz on the T-con board, phones with crusty charge-port pins that have never been near a pool. Coastal salt in the moisture makes the deposits conductive sooner. A dehumidifier will not fix anything already corroded, and this is not a health article. I am talking about boards, timber and possessions, because that is what lands on the Central Coast repair bench and that is what I can actually see.

Compressor or desiccant: the only decision that really matters

There are two ways to pull water out of air and they fail in different places. A compressor dehumidifier is a small fridge: a fan pulls room air over an evaporator coil chilled below the dew point, water condenses and drips into a tank, and the air leaves over the warm condenser coil slightly warmer and drier. The Ausclimate and Astraio 12L units here are compressor designs; the Breville Smart Dry listing does not say.

The weakness is cold. As the room drops toward 10 °C the evaporator coil runs below freezing, ices over, airflow collapses, and the machine stops to defrost. The Ausclimate listing states an operating range of 5 to 32 °C with auto defrost, which is honest: it will run at 8 °C but spend much of that time melting its own coil rather than drying your room. Extraction in a cold room is a fraction of the headline. Compressor units also carry a refrigerant charge, a start relay and a run capacitor, and the last two are what we see fail most.

A desiccant dehumidifier has no compressor and no refrigerant. Air passes through a slowly rotating wheel coated in a moisture-absorbing material, an electric element heats a section of the wheel to drive the moisture off, and it condenses on a cool plate into the tank. Because there is no coil to freeze, extraction stays roughly constant down to a few degrees above zero. Breville lists the All Climate 2-in-1 as a desiccant type and says as much: more efficient at lower temperatures than compressor units. The trade is that a heating element draws real power, the outlet air is noticeably warm (in a Central Coast July, a feature), and the wheel drive and heater thermal cut-out become the failure points instead of the compressor. Quieter too, usually. No compressor hum, only fan noise.

My rule after 16 years: an unheated bedroom, a garage workshop, a south-facing study that never gets above 14 °C, buy desiccant. A living room the heater holds at 20 °C, a laundry, a unit with the reverse-cycle running, a compressor unit does the job for less electricity.

The litres-per-day number is a lab number

Every dehumidifier is sold on a litres-per-day figure, and the industry test condition for that figure is 30 °C and 80% relative humidity. The Ausclimate listing says so explicitly (12 L/day at 30 °C and 80% RH). The others do not state the test condition. That is a Darwin wet-season room. It is not a Gosford bedroom at 13 °C and 70% RH in July.

Warm air holds far more water than cold air, and a compressor unit works on the gap between coil and air temperature. Shrink the gap and the water shrinks with it, before you count defrost cycles. So a unit rated 12 L/day will do somewhere in the region of 3 to 5 L in a cold Australian room, and a 16 L/day unit will not do three times the work of a 5 L/day one in that same room. Nobody is lying. The number is just measured somewhere you do not live. The figure I actually want, extraction at 20 °C and 60% RH, none of these four state.

This is also the way to read the Astraio listing. Twelve litres a day for $158.98 against Breville's 10 L/day for $369 looks like Breville has lost the argument. Neither side has. The 12 L figure is a rating-condition figure like everyone else's (95 °F and 90% RH on the Astraio listing), which is a hot, wet room rather than a Central Coast bedroom. What the extra money buys with Breville is an Australian service presence, a named humidity sensing system with an indicator light, an app, and a conservative room-size figure (30 m2). What the Astraio money buys is a marketplace-brand compressor unit sold by the brand itself, with a drain hose described on the listing and no warranty term stated. Both are real products. You are paying for different things, and support matters more on a machine with a compressor in it than on a kettle.

Tank, hose and where the water goes

A 2.1 or 2.4 L tank sounds reasonable until you do the arithmetic. A unit actually pulling 4 L a day from a damp room fills a 2.4 L tank in about 14 hours. It will then stop on the float switch and sit there doing nothing until someone notices. In a spare room that is a weekend. The Ausclimate lists a 2.4 L tank. The Astraio 12L states no tank volume but lists a 6.56 ft (about 2 m) drain hose for continuous drainage. Breville states no tank capacity for either unit, so check before you order.

Continuous drain is a small barbed spigot on the back of the unit that accepts a length of tube and lets the water run by gravity into a floor waste, a laundry tub, or out under a door. It is the single most useful feature on a unit you intend to run all winter. The hose end must sit lower than the spigot, and a hose that kinks or rises backs up and trips the float switch as though the tank were full. On the Astraio 12L, continuous drain is listed. On the Ausclimate and the two Brevilles it is not stated one way or the other, which is a question for the retailer.

One bench note. The float switch is a magnet on a plastic float and a reed switch on the board. Scale and biofilm build up over a season, the float sticks, and the unit either refuses to run with an empty tank or keeps running with a full one and overflows onto your floorboards. Wash the tank with mild detergent fortnightly. Thirty seconds, and it prevents a soggy-floor phone call.

Humidistat accuracy and what auto mode is actually doing

Every unit here has a humidistat: a sensor that switches the machine on when the room is wetter than your setpoint and off when it is drier. Breville calls its version SensAir and puts an indicator light on it. The Astraio lists real-time humidity monitoring and a 30 to 80% RH setpoint range. The Ausclimate states a variable humidistat with electronic touch controls. How useful each is depends on two things no listing states: sensor accuracy and sensor position.

Consumer humidity sensors are a small capacitive element with a polymer film whose capacitance changes as it absorbs water vapour. They are decent, and they drift. The ones we pull from failed boards are often 5 to 10 points off after a couple of years, and they are usually mounted at the air inlet, which is the driest air in the room once the unit has run a few minutes, because the unit is drying it. The result is short-cycling: runs, reads dry, stops, reads damp twenty minutes later, starts. It still works. It just never holds the room quite where the display says.

A $15 hygrometer on the far side of the room tells you the truth. If the display says 50% and the bookshelf says 62%, set the machine 10 points lower than your target and move on. The number I aim for in a room with electronics in it is 50 to 55% RH. Below 40% you start getting static, its own problem for boards, and you are paying to dry air that is already dry. If you run a humidifier somewhere else in the house in the same season, and people do, put the two in different rooms with a closed door between them or they will simply feed each other.

Laundry mode, which the Breville All Climate and the Astraio 12L (as its DRY mode) both list, is the machine ignoring the humidistat and running flat out. The Ausclimate's clothes-dryer claim is the same thing with a different label. It is not a tumble dryer, but it will get jeans wearable overnight in a small closed room. The electricity is not free.

What it costs to run, honestly

None of these four listings states a power draw, so I will not invent one. What I can tell you is where the two technologies generally sit. A small compressor dehumidifier in this class commonly draws somewhere between 150 and 300 W while the compressor is running, and close to nothing when it has cycled off on the humidistat. A desiccant unit has a heater in it, so it commonly draws 300 to 600 W, and it draws that whenever it is drying.

At the Australian average tariff of roughly 33c per kWh (my assumption; check your own bill), 250 W costs a bit over 8c an hour, and 500 W costs about 16.5c an hour. Run a compressor unit 8 hours a day and you are looking at around 66c a day, give or take what the humidistat does. A desiccant unit doing the same hours is closer to $1.30, but it is also putting a few hundred watts of heat into the room, so if you were going to run an oil column heater in there anyway, part of that cost is shifted rather than added.

The way to stop guessing is a plug-in energy monitor for a week. I keep a few in the workshop for exactly this, and the ones I rate are in our smart energy monitor guide. You learn what it draws and how much of the day the humidistat has it off. The second number is usually the surprise: a well-set compressor unit in a closed room spends more than half the day idle once it has caught up.

Electrical safety is simple here. These are not high-draw appliances, so a standard 10 A socket (2,400 W limit) is under no strain, but plug it straight into the wall, not the same powerboard as a heater. Check the cord and plug, and look for the RCM compliance mark on the rating plate, particularly on a marketplace-brand unit. A compressor's start current is a brief spike well above its running draw, which is why a tired powerboard with a heater on it sometimes trips when the dehumidifier kicks in.

What to check before you buy, and how to make it last

Room size first, and be honest about doors. The figures here (Breville Smart Dry 30 m2, Astraio 12L about 110 m2, Breville All Climate 50 m2) assume a closed room. An open-plan living area with a staircase is not a room, it is a building, and a 10 L/day unit in the middle of it will run all day and barely move the needle. Close the door, and put the unit in the room that has the problem, not the room that has the powerpoint.

Then temperature: below about 15 °C for most of the winter, desiccant; heated, compressor. Then drainage: decide now whether you will empty a tank daily or run a hose, because that decides where the unit lives. Then noise, which most listings here do not state in decibels; the Astraio 12L quotes 36 dB. A compressor unit has a hum and a fan; a desiccant has only a fan. For a bedroom, check the listing for a stated decibel figure or a sleep mode.

Making it last is mostly about the filter and the fan. Every unit here pulls air through a mesh pre-filter; the Breville All Climate adds a HEPA-13 stage, a consumable, and how I feel about consumables is in the air purifier guide. A blocked pre-filter starves the coil, the coil ices, defrost runs more often and the fan works harder. Rinse it monthly. When the fan bearing starts to tick or whine, a fan motor is usually a sensible repair on a $350 unit. A failed compressor usually is not.

Last: the auto-restart feature the Ausclimate lists matters more than it sounds. Coastal power flickers. A unit without auto-restart stops after a blip and stays off until someone notices, and in a spare room that is a week of damp. If you already have a UPS on the home office gear, the dehumidifier does not need one. It just needs to turn itself back on.

The 4 picks, $180 to $499

Prices are Amazon AU at time of writing (15 August 2026) and move week to week. Ranks are Amazon AU category sales ranks, checked the same day.

Side-by-side comparison

What we see fail at the bench: dehumidifiers

Dehumidifiers are not a big part of what comes through the door in Erina, but the ones that do fail in predictable places, and the failure usually tracks the architecture. Compressor units die at the compressor's supporting electronics. Desiccant units die at the heater or the wheel drive. Both die at the float switch and the control board, and both are usually killed early by a blocked filter that nobody rinsed. Here is what that looks like up close.

Decision tree: which one should you actually buy?

• The spare room is unheated and sits around 12 °C all winter. Which one? → The Breville All Climate 2-in-1. It is the only desiccant unit here, and desiccant is the only architecture that keeps pulling water at that temperature without stopping to defrost. The warm outlet air is a bonus in that room.
• The lounge room runs at 20 °C with the reverse-cycle on and the windows still stream every morning? → The Breville Smart Dry Connect at $369 if you want the reading on your phone and a set-and-forget sensor, or the Ausclimate Compact 12L at $349 if you would rather have a stated tank size and auto-restart and do not care about an app. Both are compressor units and both are the right technology for a heated room.
• I want a rack of washing dry by morning in the laundry, and the unit will run all day unattended? → The Ausclimate Compact 12L at $349: stated clothes-dryer use, a 2.4 L tank with auto shut-off, and auto-restart after a power cut so a storm does not leave it idle for a week. If you can route a hose to the laundry tub, the Astraio at $158.98 lists a drain hose for continuous drainage.
• I want the most water pulled for the least outlay and I am fine doing my own filter rinsing and tank washing? → The Astraio 12L at $158.98. The lowest-priced compressor unit here, with a drain hose described on the listing, sold by the brand's own Amazon AU store; no warranty term is stated, so treat it as a marketplace purchase. Check the RCM mark on the rating plate and put it on a plug-in energy monitor for the first week.
• There is a laptop or TV in the damp room and I want the humidity held at a safe level for the electronics? → Any of the four set to 50 to 55% RH, with a $15 hygrometer on the far side of the room to check the machine's own sensor against. In a heated room I would choose the Ausclimate at $349; in a cold one the Breville All Climate. Keep the unit out of the same powerboard as the heater.
• My dehumidifier hums, trips, and the tank stays empty, or the tank-full light is on with an empty tank? → That is a start relay, run capacitor or stuck float switch in most cases, and all three are sensible repairs. Bring it in to our Erina workshop and we will tell you within a day whether it is a $40 part or a compressor, and if the damp has already got into a laptop or TV in that room, bring that too.

Frequently asked questions

Is a compressor or a desiccant dehumidifier better for an Australian winter?

It depends on the room temperature, not the state. A compressor unit is a small refrigerator: it chills a coil below the dew point and water condenses on it. Below about 15 °C the coil starts icing and the unit spends a growing share of its time in defrost, so extraction falls away. A desiccant unit uses a moisture-absorbing wheel regenerated by a heating element, so it has no coil to freeze and keeps working in the cold, but it draws more electricity while running and pushes warm air into the room. Heated living room, laundry or a unit with reverse-cycle on: compressor. Unheated bedroom, garage or south-facing study: desiccant. Of the four here only the Breville All Climate is desiccant.

Why does a 12 L/day dehumidifier only collect a couple of litres in my bedroom?

Because the litres-per-day figure is measured at 30 °C and 80% relative humidity, which is a tropical wet-season room, not a Central Coast bedroom in July. Warm air holds far more water than cold air, and a compressor unit works on the gap between the coil temperature and the air temperature, so in a 13 °C room there is less water available and a smaller gap to work with, before you even count the time spent defrosting. A unit rated 12 L/day will typically pull 3 to 5 L in a cold Australian room. Nobody is lying on the box; the test is just done somewhere you do not live. The Ausclimate is the only one of these four that prints the test condition on the listing.

Does a dehumidifier stop condensation damaging my laptop or TV?

It reduces the cause. Condensation forms when damp air touches a surface colder than its dew point, and a cold laptop lid or the back of a TV that has been off all night qualifies just as a window does. Holding the room at around 50 to 55% RH lifts the dew point gap so that moisture is far less likely to form on those surfaces, which slows the wetting-and-drying cycle that starts corrosion on a circuit board. It will not reverse corrosion that has already started, and it does nothing for a device stored in an unheated cupboard or car. Pair it with a standalone hygrometer so you know the room is actually at the number the machine displays.

Tank or continuous drain, and how often will I empty it?

A 2.1 or 2.4 L tank fills in roughly half a day if the unit is genuinely pulling 4 L from a damp room, after which the float switch shuts it off and it sits idle until someone notices. For a room you walk through daily that is fine. For a spare room, laundry or anything you want to run unattended for weeks, a continuous drain hose running by gravity to a floor waste or laundry tub is the feature to insist on. The hose end must sit lower than the spigot or the water backs up and trips the float. Of the four here only the Astraio lists a drain hose for continuous drainage; the others do not state it either way, so check the current listing.

How much does a dehumidifier cost to run in Australia?

None of the four listings states power draw, so measure your own with a plug-in energy monitor. As a guide, small compressor units in this class commonly draw 150 to 300 W while the compressor is running and very little when the humidistat has cycled it off; desiccant units commonly draw 300 to 600 W whenever they are drying because of the heating element. At the Australian average tariff of roughly 33c per kWh (my assumption), 250 W is a bit over 8c an hour and 500 W about 16.5c an hour. A compressor unit cycling through an 8-hour day might cost around 66c; a desiccant unit closer to $1.30, with some of that returned as heat into the room.

What usually goes wrong with a dehumidifier and is it worth repairing?

On compressor units the start relay and run capacitor are the common failures: the unit hums, trips on thermal overload, and the tank stays empty while the fan runs. Both are inexpensive parts and sensible repairs. A seized compressor or refrigerant leak generally is not, because the labour costs more than the machine. On desiccant units the regeneration heater's thermal cut-out and the wheel drive are the usual suspects. On both, a stuck float switch from scale in the tank either locks the unit out or lets it overflow onto the board, and a clogged filter shortens the life of everything downstream. Rinse the filter monthly, wash the tank fortnightly, and listen for a ticking fan.

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