Evaporative Cooling Services WA 2026 - Get Quotes

How Evaporative Cooling Actually Works

The principle is the same one that makes you feel cold stepping out of a pool. A fan draws outside air through pads that are kept wet by water trickling down them, the water evaporates into the passing air, and the energy that evaporation takes comes out of the air itself as a temperature drop. The cooled air is then pushed through ducting in the roof space and out through ceiling outlets into the rooms below. There is no refrigerant, no compressor and no sealed circuit anywhere in the system, which is why the whole thing costs a fraction of what a refrigerated unit does to buy and to run. It is the oldest form of cooling there is and the reason a wet towel over a doorway works at all.

The unit itself sits on the roof on most Perth installations, which is why you see them on tile and Colorbond roofs across the older suburbs. Inside the cabinet there are cooling pads on each side, a water tray in the base, a small pump lifting water to the top of the pads, a float valve maintaining the water level and a large fan drawing air through. A modern unit adds an inverter drive on the fan, a controller in the hallway and a bleed or dump system that periodically discharges water to stop minerals concentrating in the tray, and the units most commonly fitted in Western Australia come from Seeley International under the Breezair and Coolair names, along with Bonaire, Braemar and Brivis. None of it is complicated, and that simplicity is a genuine advantage when something needs fixing fifteen years later.

The part that surprises people moving here from other systems is that evaporative cooling needs the house open. It is a positive pressure system, meaning it constantly pushes fresh outside air in, and that air has to leave somewhere. Windows or doors are opened on the side of the house you want the air to move towards, and that airflow is what carries the heat out. Closing everything up, which is exactly what you would do with a refrigerated system, makes an evaporative system stop working almost immediately. Households used to refrigerated cooling often spend the first summer fighting this before someone explains it.

That open house requirement has practical consequences in a Perth summer. Security becomes a consideration on any window left open at night, which is why so many WA homes with evaporative cooling also have security screens on the openings they use for airflow, and the security doors and screens page covers that side. Insects are the other consideration, particularly in the weeks when flies are worst. Neither is a reason to rule the system out and both are worth thinking about before installation rather than discovering in January. Flyscreens on the windows you intend to use are a small cost at installation and an annoying retrofit afterwards.

Airflow is measured rather than guessed on a properly designed system. Installers work in litres per second or air changes per hour, aiming to replace the air volume of the house many times over each hour, and the unit capacity, duct sizing and outlet count all follow from that figure. A system that moves too little air will never cool the house no matter how cold the air at the outlet feels. It is one of the more common faults in older installations where rooms have been added since.

The cooling effect has a hard ceiling set by the weather. The lowest temperature the air can theoretically reach is the wet bulb temperature, which depends on both heat and humidity, and no evaporative system gets all the way there. A well maintained unit on a dry Perth afternoon will commonly deliver air ten to fifteen degrees below the outside temperature at the outlet. On a humid day that margin collapses, and understanding that before you buy prevents a great deal of disappointment later. Checking the forecast humidity alongside the temperature will tell you in advance how the afternoon is going to feel.

Comparing it against refrigerated cooling is worth doing honestly rather than tribally. Refrigerated systems control temperature and humidity in a sealed house and they work regardless of the weather, while evaporative systems move large volumes of filtered fresh air very cheaply and suit the way a lot of Perth households actually live. The air conditioning services page covers the full range of options across the state, and the ducted air conditioning installation page covers the refrigerated alternative in detail. Plenty of Perth households run both, and the reasons are usually practical rather than ideological. The right question is not which technology is better, it is which one matches how your household uses the house in February.

Where It Suits Western Australia and Where It Does Not

Perth's summer climate is close to the textbook case for evaporative cooling. Daytime relative humidity through December, January and February frequently sits between twenty and forty percent when the temperature peaks, and those are the conditions in which the technology performs best. The afternoon sea breeze that arrives up the coast most summer days brings its own relief, and an evaporative system takes advantage of it by drawing that air through the house. Owners in the older suburbs from Bassendean to Bull Creek have been running these systems for decades for good reason.

Inland Western Australia suits it even better. The Wheatbelt, the Goldfields and the inland South West see hot, genuinely dry summer conditions, and evaporative systems perform strongly there while costing very little to run. Towns like Kalgoorlie, Merredin, Northam and Narrogin have long relied on them, and the low running cost matters more in places where summer heat lasts for months. Water availability is the constraint in some of those locations rather than performance. Evaporative systems have the additional advantage inland of continuing to supply filtered fresh air on days when dust keeps the windows shut on a refrigerated house.

The north of the state is where the honest answer changes. Through the Pilbara and the Kimberley, the build up and the wet season bring humidity that makes evaporative cooling largely ineffective for months at a time, and refrigerated cooling is the practical choice there. The dry season is a different matter, but a system that fails you through the worst of the year is not a system. Anyone quoting evaporative cooling for a Broome or Port Hedland residence should be asked directly how it will perform in February. A dual system, with evaporative through the dry and refrigerated through the wet, is sometimes the answer on a larger northern home.

Coastal humidity affects Perth too, just less severely. A muggy spell in late summer, particularly after tropical moisture has tracked south, will noticeably reduce what the system delivers for a few days at a time. Households that cannot tolerate those days often solve it by adding a single refrigerated split system to the main bedroom and leaving the evaporative system to do the whole house work. That hybrid arrangement is extremely common across Perth and it is a sensible answer rather than an admission of failure.

The house itself matters as much as the climate. Evaporative cooling works well in a house with reasonable ceiling height, a roof space that can take ducting and enough openable windows to establish airflow through the living areas. It works poorly in a small sealed apartment, in a home with very limited roof space, or where the occupants want every window shut and the temperature held at a set point. Knowing which description fits your household is the single most useful thing you can do before asking for quotes. Write that description down before the first installer arrives, because it will shape every recommendation you get.

Perth's double brick construction has a real effect on how the system feels. Masonry holds heat through the evening, so a house that has been closed up all day at forty degrees will take a while to shed that stored heat even once cool air is moving through it. Running the system from late afternoon and continuing into the evening works better than starting it at eight at night. Ceiling insulation makes a substantial difference to the same problem, and the ceiling and wall insulation page covers bringing an older Perth roof space up to standard. Painting a dark roof a lighter colour at the next repaint has a measurable effect on the same problem. A ceiling that is properly insulated also keeps the heat out during the day, which matters more than how quickly it leaves at night.

Sizing, Ducting and Outlet Layout

Capacity is expressed in litres per second of airflow, and that figure comes from the volume of the house and the number of air changes per hour the designer is targeting. Domestic systems commonly run from around one thousand litres per second on a small house to well over two thousand on a large one. A competent installer measures the floor area, notes the ceiling height, counts the rooms that need outlets and calculates from there. An installer who quotes a unit size from the front verge has skipped the only step that matters.

Outlet placement decides how the house actually feels far more than the badge on the unit. Outlets go in the rooms people occupy, sized to the room, with the airflow directed so it moves towards the openings that will be left open. Bedrooms, the main living area, the kitchen and any home office are the usual list, while bathrooms, laundries and walk in robes are normally left out. Adding an outlet later is straightforward while the ducting has capacity and expensive once it does not. Outlets in a room with a ceiling fan work particularly well together, since the fan spreads the incoming air rather than letting it drop in one spot.

Duct sizing is where cheap installations reveal themselves. Ducting has to carry the design airflow without excessive resistance, which means the trunk duct from the unit is large and the branches reduce progressively as they serve fewer outlets. Undersized or crushed ducting strangles the system, and flexible duct run with long sagging loops through a roof space does the same thing more quietly. Ask what duct sizes are specified and whether the runs will be supported properly.

The roof space it all sits in is hotter than most people appreciate. A Perth roof cavity in February can exceed sixty degrees, and ducting running through it picks up heat between the unit and the outlet unless it is properly insulated. Rated insulated ducting is worth specifying rather than accepting the thinnest product that meets the minimum. Roof ventilation reduces the problem at its source, and the roof ventilation and whirlybird installation page covers that work. A roof space that runs hot also shortens the life of everything stored in it, from the ducting to the wiring.

Two storey homes need a different approach and some installers avoid them. Heat rises, the upper floor is hardest to cool, and ducting has to reach it either through a roof space that sits above only part of the house or through a bulkhead. Sometimes the answer is a second unit, sometimes it is a hybrid with refrigerated cooling upstairs, and sometimes evaporative cooling is simply the wrong choice for that building. An installer who walks the upper floor before quoting is taking the job seriously. Ask directly whether they have done two storey evaporative installations before and how those houses performed.

Relief air is the design element most often ignored and it costs nothing to get right. Because the system pressurises the house, it needs a defined path for air to leave, and relying on whichever window someone happens to open produces uneven results. Some installations include purpose made relief vents, and most rely on the occupants opening specific windows in the rooms furthest from the unit. Ask the installer to explain where the air is meant to go, because the answer tells you whether they designed the system or simply sold it.

How the Installation Runs

A new ducted installation on an existing house usually takes one to two days. The crew sets up in the roof space, cuts and flashes the roof penetration for the unit, positions and secures the unit on its base, runs the trunk and branch ducting, cuts the ceiling outlets, connects the water supply and the electrical circuit, then commissions and balances the system. Most of the work happens above the ceiling, which is why access to the manhole and a clear roof space matters. Clearing stored items from the roof space before the day is a genuine help. Pets are worth securing as well, since the crew will be moving in and out with ducting and the front door tends to stay open.

The roof penetration is the part that has consequences if it goes wrong. The unit sits on a purpose made base that has to be properly flashed into the roof covering, and the detail differs between tile and metal roofing. A poorly flashed penetration will leak in the first decent winter front, and it will leak into the roof space rather than somewhere obvious. If your roof is old or brittle, raise that before the installation, and the roof repairs page covers rectifying a roof that is not in a fit state to take the load. Ask for photographs of the completed flashing, which takes the installer two minutes and gives you a record.

Water supply is a plumbing connection and it needs doing properly. The unit is fed from the mains supply through a line run up to the roof, and depending on the arrangement and the local water authority requirements a backflow prevention device may be required so water cannot be drawn back into the drinking supply. That is licensed plumbing work, and the backflow prevention device installation and testing page covers what is involved. Ask whether that is included in the quote or sitting outside it.

Electrical work is the other licensed trade in the job. The unit needs a supply run from the switchboard, the controller needs cabling to its position in the hallway, and the work has to comply with the wiring rules. On older Perth homes with a small or ageing switchboard, the installer may find there is no spare way available, and the switchboard upgrade page covers that situation. An electrician's licence number should appear on the paperwork, and the electrical services page covers finding one. Ask whether a residual current device protects the new circuit, because on older boards it often does not.

Replacing an old unit while keeping the existing ducting is the most common job of all in Perth right now, given how many systems went in during the 1990s. It is considerably cheaper than a full installation because the ducting, outlets and often the wiring stay in place. The catch is that ducting more than twenty years old may be degraded, crushed in places or simply undersized for a modern unit, so a good installer inspects it rather than assuming. Ask for an opinion on the ducting in writing, since replacing it later means doing the disruptive part twice.

Commissioning is where a good installation separates itself. The installer should run the system, check the airflow at each outlet, adjust the outlet dampers so the distribution is even, confirm the water level and bleed operation, and walk you through the controller. Rooms at the end of a run are the ones that suffer when this step is skipped. Fifteen minutes of balancing at handover prevents years of one bedroom never quite cooling.

Water Use, Scale and the Bore Question

An evaporative system uses water and there is no getting around it. A domestic unit running hard will typically consume somewhere between fifteen and forty five litres an hour depending on capacity, conditions and how the bleed system is configured. Over a Perth summer that adds up to a meaningful volume, though it remains modest next to what a garden consumes. The water charge is real and it should be part of any running cost comparison rather than quietly left out. Comparing the water figure against the electricity saving is the only fair way to weigh it up.

The bleed or dump system is the reason for a good share of that consumption and it earns its place. As water evaporates, the dissolved minerals it leaves behind concentrate in the tray, and without a mechanism to discharge some of that water the pads scale up and the system loses performance. Older units bleed continuously while running, while modern units dump the tray on a timer or when the system shuts down, which uses less water overall. Ask which arrangement the unit you are quoted uses, because it affects both water consumption and pad life. A unit that dumps at shutdown rather than bleeding continuously will also leave the tray dry between runs, which helps with hygiene.

The bore water question comes up constantly in Perth and the answer is consistent. Garden bore water in the metropolitan area is typically high in iron and dissolved minerals, and feeding it to an evaporative cooler causes rapid scaling of the pads, staining of the roof and the walls below the unit, and premature failure of the pump and the float valve. Manufacturers do not support it and it will generally void the warranty. Households with a bore understandably ask, and the honest answer is that the unit runs on scheme water, with the reticulation and garden watering page covering what the bore is genuinely good for.

Water hardness varies across the state and it shapes maintenance intervals. Parts of regional Western Australia draw supplies that leave noticeably more mineral deposit than metropolitan scheme water does, and pads in those areas need replacing more often. Where the supply is particularly hard, some households run the unit with a more aggressive bleed setting and accept the extra water use in exchange for pad life. A local installer will know what the supply in your town does to a cooling pad. Ask the installer what pad life they expect on the local supply, since the honest answer varies from one town to the next.

Hygiene is worth addressing plainly because people ask about it. A system holding standing water needs the tray drained rather than left sitting through the off season, the pads kept in good condition and the unit serviced annually. A neglected unit with a stagnant tray is an unpleasant thing, and it is the source of the musty smell owners sometimes notice on start up. Public health information for Western Australia is published by the Department of Health, and routine servicing deals with the issue comfortably.

Water restrictions in Western Australia target garden watering rather than cooling systems, and the sprinkler roster that governs reticulation does not stop you running an evaporative unit on a hot day. That distinction confuses people who assume every water rule applies to everything. What does apply is ordinary good sense about a leaking float valve or a unit bleeding continuously when it does not need to, both of which waste water invisibly on a roof where nobody sees it. A unit that has left a permanent wet patch on the roof is telling you something. Sending someone up to look at the unit after a hot spell is worth doing once a season.

Running Costs and Power

The running cost advantage over refrigerated cooling is large and it is the main reason these systems remain popular here. An evaporative unit's electrical load is essentially one fan and one small pump, commonly drawing somewhere in the range of a few hundred watts to around one and a half kilowatts depending on capacity and fan speed. A ducted refrigerated system serving the same house draws several times that when the compressor is running. Over a Perth summer the difference in electricity cost is substantial, and for a household running cooling most afternoons it is the deciding factor. That gap matters most to households that leave cooling running for long stretches through the afternoon rather than for an hour at night.

Water cost has to be added back to make the comparison fair. At typical consumption over a hot Perth summer, the water an evaporative system uses adds a real but modest amount to the quarterly bill, and it does not come close to erasing the electricity saving. Anyone presenting evaporative cooling as free to run is overstating it and anyone presenting the water cost as a dealbreaker is doing the same in the other direction. Ask an installer to give you both figures for the unit they are quoting.

Solar changes the calculation for some households and not others. A rooftop solar system generating through the middle of the day pairs naturally with cooling that runs through the afternoon, and for households with solar the marginal cost of running either system falls. That shift has moved some Perth owners towards refrigerated cooling who would previously have chosen evaporative, particularly where they also want heating in winter. The solar panel installation page covers that side of the decision. It is worth pricing both systems against your actual usage pattern instead of assuming the cheaper one to run will stay that way.

Fan speed is the control that matters most for both comfort and cost. Modern inverter driven units vary fan speed continuously rather than switching between fixed steps, which lets the system run quietly at low speed for long periods instead of cycling hard. Running at a moderate speed continuously through the afternoon generally produces a more comfortable house than running flat out for an hour. It also extends the life of the fan and the pump. A unit that is audibly straining on high speed all afternoon is usually undersized for the house.

The house does more of the work than the unit does on the hottest days. Ceiling insulation, roof colour, external shading on west facing glass and window treatments all reduce the heat load the cooling has to remove, and a well shaded, well insulated house feels dramatically better on any system. West facing windows are the classic Perth problem, and addressing them is often cheaper than upgrading the cooling. The window and door sealing page covers reducing unwanted heat transfer through openings.

Ceiling fans deserve a mention as a companion rather than a competitor. Moving air across skin makes a room feel several degrees cooler without changing the actual temperature, and a fan running alongside an evaporative system lets it work at a lower speed for the same comfort. They cost very little to run and very little to install, and the ceiling fan installation page covers the work. In a Perth bedroom, the two together are a genuinely effective combination. They also keep working during the humid spells when the evaporative system has little to give.

Servicing, Winter Covers and Repairs

An annual service before summer is the single habit that keeps these systems reliable. The technician cleans or replaces the pads, flushes and cleans the tray, checks the pump and float valve, inspects the fan and bearings, tests the controller and bleed operation, and checks the roof penetration and the ducting connections. It is not expensive work and it prevents most of the failures that leave a household without cooling in the middle of a heatwave. Booking it in October rather than January also means you can actually get someone. Photograph the service sticker or the invoice each year so the history stays with the unit. A documented service record also helps considerably when a warranty claim comes up.

Pads are the consumable and they have a finite life. Aspen fibre pads, still fitted to many Bonaire and Braemar units, typically need replacing every couple of seasons, while rigid cellulose media such as the Chillcel pads used in Breezair units last considerably longer. Scale, mineral deposit and simple degradation all reduce how much water the pad can hold and therefore how much cooling it delivers. A system that has lost performance over a few years has very often just worn out its pads.

The water pump and float valve are the components that fail most often after the pads. A failed pump means dry pads and warm air, which is the symptom most owners report, while a failed float valve either starves the tray or overfills it. Both are inexpensive parts and straightforward replacements for a technician who works on these systems. Where a unit is more than fifteen years old and needs several parts at once, replacement usually makes better sense than repair. Ask the technician to quote the pump and the pads together, since replacing one and then the other means paying twice for the roof access.

Winter is when an uncovered unit quietly costs you money. The system is a large opening in the roof connected to ducting that runs to every room, and through a Perth winter that becomes a path for cold air to drift down into the house. A fitted winter cover or a damper arrangement closes that path off, and the difference in how a house feels in July is noticeable. Covers run $120 to $320 supplied and fitted, and some modern units include a powered winter seal in the unit itself. Uncovered ducting also lets dust and insects drift into the house through the outlets over winter.

Roof access for servicing is a safety matter rather than a formality. The unit sits on a roof, often a tiled one, and getting to it safely requires the right equipment and someone who knows what they are doing. This is not a job to attempt from a household ladder, particularly on a brittle or steeply pitched roof. Workplace safety requirements in this state are administered by WorkSafe WA, and a contractor who arrives with proper roof access equipment is showing you how they work.

Knowing when to stop repairing is worth thinking about before the next fault. A unit past fifteen years that needs a pump, a set of pads and a controller is approaching the cost of a new unit installed on the existing ducting, and the new one will be quieter, more efficient and under warranty. Where the ducting is sound, that replacement is a straightforward job. The air conditioning repairs page covers the repair route and the air conditioning servicing page covers keeping a sound system healthy. Ask for the unit age and the remaining pad life to be noted on any repair invoice, because that is the information the replacement decision needs.

Costs in Detail

A new ducted evaporative system supplied and installed runs $3,200 to $6,800 across the Perth metropolitan area for a typical house. The spread reflects unit capacity, the number of outlets, roof type and pitch, the distance from the switchboard and how straightforward the water connection is. A small three bedroom home with six outlets sits near the bottom of that range and a large single storey home with a dozen outlets sits near the top. Two storey installations and homes with difficult roof access price above it.

Replacing an existing unit and reusing the ducting runs $2,400 to $4,800, which is the most common job in Perth at the moment. That figure assumes the ducting, outlets and electrical supply are sound and stay in place. Where the installer finds degraded or undersized ducting, replacing sections adds to it, and a full reduct approaches the cost of a new installation. Ask for the ducting to be inspected and reported on before the unit is ordered. A unit that has been sitting on a roof for two decades will also have been chosen for the house as it was then, which may no longer be the house you have.

Individual outlets added to an existing system run $180 to $420 each, provided the unit and the trunk duct have the capacity to serve them. Where they do not, the conversation becomes a larger one about the whole system. A room added to a house since the original installation is the usual reason this comes up. Having it assessed properly avoids adding an outlet that simply steals airflow from the bedrooms. Balancing the whole system again afterwards is part of the job and should be in the price.

Servicing and consumables are modest. An annual service runs $150 to $320 depending on access and what is found, a full set of pads runs $180 to $480 depending on the unit and the pad type, and a water pump replacement runs $180 to $420 fitted. A winter cover supplied and fitted runs $120 to $320. None of these figures is large next to the cost of losing cooling in February, which is the honest case for keeping the service up.

The trade work around the unit is where quotes most often differ. A dedicated electrical circuit runs $280 to $750 depending on the distance from the switchboard and what the board can accept, a switchboard upgrade where one is needed is a separate job again, and a plumbing connection with backflow prevention adds to the water side. These are legitimate costs and they belong in the quote as named lines. A quote that is silent on them is not cheaper, it is incomplete. Ask for each trade's portion to be itemised so you can see what you are actually comparing.

Regional Western Australia prices around travel and availability. Installers working out of Bunbury, Albany, Geraldton, Kalgoorlie and the larger Wheatbelt towns charge much what their city counterparts do on their own patch, and a Perth crew sent out adds mobilisation to the figure. In smaller towns the practical constraint is how many installers there are and how booked they get before summer. Arranging the work in autumn or early winter is both cheaper and far easier to schedule. A local installer who works your town will also know which units hold up in the conditions there.

What to Look Out For

Be cautious of a quote given without anyone going into the roof space. The roof cavity determines whether the ducting can be run, what condition the existing system is in, whether there is room for the trunk duct and how the unit will be supported. A price quoted from the driveway is an estimate dressed up as a quote, and it is the most common reason a job grows once work starts. Ask whether they have been up there before you compare figures.

Watch for a unit sized by the number of bedrooms alone. Airflow should be calculated from the volume of the house and the air changes being targeted, and two houses with the same bedroom count can need quite different capacities depending on ceiling height, layout and orientation. An undersized unit can never be fixed by turning it up. Ask what airflow figure the quote is based on and how it was arrived at. Airflow figures should be written on the quote, not quoted verbally on the day.

Take the bore water question seriously if someone tells you it is fine. Feeding garden bore water to an evaporative cooler scales the pads, stains the roof and the wall below, and shortens the life of the pump and the float valve, and manufacturers do not support it. An installer who offers to plumb the unit to your bore is either inexperienced or telling you what you want to hear. The scheme water connection is the correct arrangement and it is what the warranty assumes. The same caution applies to rainwater tank supply, which carries its own debris and is not what these units are designed around.

Check that the roof penetration and flashing are specified in writing. This is the detail that causes leaks, and the leak appears in the roof space in winter rather than in the room in summer, so it goes unnoticed for a while. Ask what flashing arrangement will be used for your roof type and who carries responsibility if it leaks. An established installer answers that without any hesitation at all.

Be careful about quotes that leave the electrical and plumbing work vague. Both are licensed trades, both are genuine costs, and a quote that omits them is not competitive, it is just incomplete. Ask whether the electrician and plumber are part of the installer's team or subcontracted, and ask for the licence details. It is a reasonable question and it takes one line in an email. Keep the certificate of electrical compliance and the plumbing paperwork with the unit documents.

One last thing, be wary of anyone who claims evaporative cooling works as well as refrigerated cooling in any conditions. It does not, and the honest limitation is humidity. An installer who explains where the system will struggle and suggests a bedroom split system as a companion is giving you better advice than one who promises the same result for a third of the price. That candour is usually a reliable signal about the rest of the quote. An installer who recommends a smaller unit than you expected, and explains why, is worth listening to.

How to Get Comparable Quotes

Have the basics in front of you before you ring. The floor area, the number of rooms you want cooled, ceiling height if it is not standard, roof type and pitch, whether the house is single or two storey, whether there is an existing system and roughly how old it is, and how the roof space is accessed. A photograph of the existing unit on the roof and one of the manhole opening help more than a paragraph of description. Installers quoting from that information price the actual job.

Give each installer the same written questions. The airflow figure in litres per second and how it was calculated, the unit make and model, the number and position of outlets, duct sizes and insulation rating, whether the electrical circuit and any switchboard work is included, whether the water connection and backflow prevention are included, the roof flashing arrangement, who commissions and balances the system, and the warranty terms on the unit and on the installation. Written answers are what make three prices genuinely comparable. Ask each one to state what is excluded as well as what is included. A quote that lists its exclusions plainly is usually the most honest document in the pile.

Ask specifically about the existing ducting if you are replacing a unit. Whether it has been inspected, what condition it is in, whether it suits the capacity of the new unit, and what it would cost to replace if needed. This is the most common source of a variation after work starts, and settling it in writing beforehand removes the surprise. A contractor happy to put that in the quote is one who has actually looked. Ask for a photograph of the inside of the existing ducting if the installer has been up there.

Book the work outside the summer rush. Demand for cooling work in Western Australia climbs steeply from November and peaks through the first heatwave, when availability disappears and nobody is negotiating. Autumn and winter bring better prices, better availability and an installer who is not trying to fit you between two breakdowns. If the existing system limped through last summer, that is the moment to deal with it rather than hoping.

Settle the whole picture rather than just the unit. Ceiling insulation, roof ventilation, a companion split system in the main bedroom and ceiling fans all interact with how the house feels, and pricing them together gives you a real number for the outcome you actually want. The air conditioning installation page covers the refrigerated side if you end up comparing the two directly. Getting both priced properly is the only way to make that comparison on evidence rather than on instinct. Where the answer turns out to be refrigerated cooling, that is a legitimate outcome and better reached before the money is spent.