Duct Cleaning

Duct Cleaning, Ducted Heating CleaningConsumers are often sceptical about duct cleaning.
They are often unsure as to what duct cleaning actually entails.
 They are confused about what needs to be done and how often it’s needed.
They want to know why ducted systems need cleaning and what exactly are the benefits of having a clean ducted system.

Duct cleaning originated in the US. Many years after their ducted systems were installed, it was discovered that the duct lines were littered with dust and debris, hence the need for cleaning. Most of these systems, however, had good quality filters on the intake which restricted a lot of the dust entering the system, keeping the return line, fan and heater interior relatively clean. Therefore cleaning focused mainly on the outlet ducting and is commonly referred to as Air Duct Cleaning.


Ducted Heating Cleaning (for Australian conditions)


  • If you are considering cleaning your ducted heating system, it is important to realise that cleaning your ducted heating system is not just about the ducts.
  • In most cases up to 90% of the dust (and therefore dust mites, pollens, germs and fungi) is located in the air return ducting and heater interior.
  • The dust and germs stored here breed and multiply continuously, even when the system is not in use.
  • These contaminants lay ready and waiting for you to turn the system on, allowing them to blow all around your home for you and your family to breathe in.

A quality duct clean comprises of the following elements.

Return Air Cleaning:
Before the warm air comes out of your ducts, the air must enter the heater.
It does this through the return air grill.
The air then travels along the return duct to the heater.
Up to 90% of the dust, fungi, dust mites and bacteria in your system is contained in this area

It is most important that the entire length of this duct is thoroughly cleaned, before the outlet ducts are touched!

Before Ducted Heating CleaningAfter Ducted Heating Cleaning
Dirty Return Grill Clean Return Grill

The return air vent cover and return duct cover (if present) is removed for cleaning, as well as the heater panel that exposes the fan motor.
This gives access to both ends of the return duct.

Before Duct CleaningAfter Duct Cleaning
Dirty Return Cover Clean Return Cover

The return line is then brushed down to loosen the built up dust and debris, so that it can be easily extracted.

Allow between 45 mins and 1 hour to complete this section.

Before Duct CleaningAfter Duct Cleaning

Before Duct Line CleaningAfter Duct Line CleaningReturn Duct line Before Cleaning Return Duct Line After Cleaning

Cleaning of Heater Interior:

With the fan already exposed, it is removed so that the blades, casing and motor can be separated for individual cleaning.
The interior walls of the heater and heating channels are also cleaned, dust, debris and foreign objects removed.
Allow a further 30-45 minutes to complete this section.

Heating Duct CleaningHeating Duct CleaningHeater Unit Heater unit with fan panel removed.

Fan inside heater unit Fan removed from heater unit

Fan blades, casing and motor Clean fan motor reassembled

All Duct Lines Are Cleaned and Checked.
Starting with the outlets nearest the actual heater a dust probe displaces air backwards and travels down the duct line into the main trunk, toward the heater.
Using a powerful truck mounted vacuum system in tandem with the probe, dust and debris is dislodged from the duct lining and safely extracted to a tank in our truck.
Allow a further 30 to 60 minutes for a system with up to 10 outlets

Floor Duct CleaningCeiling Duct Cleaning

Cleaning floor ducts Cleaning Ceiling Ducts

Sanitising with Bactigas:

Once steps 1-3 are completed your system is turned on to check it is operating correctly.
With air moving through the system Bactigas is sprayed into the return vent so it can travel down the return line, through the heater and through all the outlets.
This sanitises your entire ducted heating system.
Bactigas is distilled from the Australian teatree plant, and is a natural antiseptic.

Tea Tree Oil has been used as a natural antiseptic and fungicide for over 60 years in Australia and has shown to possess antimicrobial activity against a wide range of bacteria and fungi.


Why your ducted system requires regular cleaning

When your ducted system is in use, a fine layer of dust slowly builds up along the inner lining of the intake duct and inside the heater.
This collection of dust contains dust mites and bacteria that breed and multiply.
These contaminants then create more dust and a greater concentration of allergens.
Cleaning your system removes this build up and ensures your system delivers clean healthy air into your home.
A clean system also allows air to flow unrestricted, ensuring your system runs more efficiently.
Provided your system is cleaned thoroughly and correctly, three years is a suitable time frame for cleaning.
If you have persons in your household with severe dust allergies such as asthma then you may elect to clean it more often.

Cleaning of Ducted Air Conditioning Systems and Reverse Cycle Ducted Heating/Cooling Systems

Ducted air conditioning and reverse cycle systems both work in a similar way to a standard ducted heating system; in that they recirculate the same air throughout the home.
They have a return air duct, a heater &/or cooling unit that contains a fan motor and cooling coil, and of course outlet ducts.
The fan draws air along the return ducting and through a cooling coil, before coming out the individual ducts.
These systems are cleaned in the same way as a standard ducted heating system.
The major difference is the intake grill will have a filter that will be cleaned as part of the process, or replaced if necessary.


Ducted Evaporative Cleaning


Evaporate cooling systems consist of the cooling unit (located on the roof) and outlet ducts usually located in the ceiling but sometimes come out the wall.

These systems draw outside air through filters cooled by water.

The air travels through large diameter ducts and then leaves the home through slightly open doors and windows.

The process for cleaning these systems is twofold.

Step 1: The main unit is cleaned, including the fan motor and blades, the cooling filters and pump filter. The water is drained (some units are self-draining) and the brown gunge removed from the water storage area.

Step 2: The debris from each individual duct lining is removed, in a similar way to step 3 above.

Before Ducted Evaporative CoolingAfter Ducted Evaporative Cooling
Dirty Cooling Unit Clean Cooling Unit


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