By Julie Curnow

Cost to Replace an Evaporative Air Conditioner

The cost to replace an evaporative air conditioner unit is from around $2,600 installed for the smallest model including new controller and up to around $4,000 for a standard installation. Price depends on brand, system size and ease of installation. In the industry this is referred to as an evaporative change over.

Plastic flashing which sits between the evaporative and the roof tiles

Plastic flashing

You may also need your dropper and flashing replaced. Our price for a replacement dropper and durable plastic flashing is $400 installed.
The ducting and evaporative air conditioner connect on to the dropper. Your evaporative aircon sits on flashing so that water doesn’t leak into your roof.

Some companies will use metal flashing as it is cheaper. Metal flashing rusts. Plastic flashing is made of a special ultra violet polymer and generally comes with a 25 year warranty. We recommend plastic flashing as the additional cost is tiny over 20 years and you don’t have to worry about it rusting and potentially leaking into your roof space.  

If your ducting is 20 years old it is best replacing it as it is reaching the end of its expected life and you don’t want cooled air leaking into your roof space. The price of ducting depends on the number of outlets.

Generally ceiling grilles are not replaced unless the customer requests otherwise. This means that there is no need to cut your ceilings.

Your old evaporative unit, flashing and ducting are large so check whether any replacement evaporative air conditioner price includes a skip bin or removal of the old system.

Evaporative ducting

Evaporative ducting

Call your local aircon dealer to get an idea of the cost to replace an evaporative air conditioner.
You will need to provide:

  • Brand of your conditioner (you can see it on the controller)
  • Model from your invoice. If this is not known provide the area that needs cooling
    (home area less garage, bathroom, laundry and hall)
  • Number of outlets (ceiling grilles where the air comes out)
  • Whether your home is single or double storey and if the roof pitch is unusually steep

Provide if you know:

  • State of flashing and whether it is metal or plastic
  • State of ducting.

Ensure that the company will come out for free before they do the installation so they can give you a firm quote. No one wants expensive surprises on the day of installation.

Contact Air and Water Residential in Perth on 6363 5343 for the cost to replace an evaporative air conditioner at your home or business. Air and Water Residential is a Bonaire Premium Dealer. We also repair Cool Breeze and Bonaire evaporative air conditioners.


Spring 2016 get up to $300 when trading in on your old evaporative for a new one, see our Specials page for full details.

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