Coil Cleaning

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Expert coil cleaning service in Sydney

Reasons for coil cleaning

All Duct Cleaning Services (Aust) Pty. Ltd.’s trained technicians will carefully clean and sanitise your air-conditioning heating/cooling coil. Coil cleaning has become a specialised area of care within air conditioning systems. The coil is in the air flow path on all air conditioning systems. Therefore it has a direct effect on the rate of air flow and the efficiency of heat transfer and indoor air quality.

Air conditioning cooling coils provide moisture, cool temperature and food for biofilm growth. Biofilm build-up effects the cooling coil in the following ways:

Blockages in the coil

Blockages in the coil decrease the amount of air passing through the system. This, in turn, will affect the air conditioning system’s ability to cool the air. The system tries to compensate for the reduction of cooling efficiency by running the compressor for longer durations. Effective maintenance on the cooling coil saves you money by reducing energy consumption.

Corrosion of the coil

Biofilms will attach themselves to the fins on the cooling coil. In doing so, they etch into the surface to provide a secure holding. This etching eats away at the cooling coil and over time will inhibit the cooling coils ability to perform efficient heat transfer. The solution for coil corrosion is to remove biofilm through maintenance. The alternative is to replace the cooling coil, which has a greater cost than coil maintenance.

Reduced heat transfer

The presence of biofilm on the coil surface acts as insulation between the air and the cooling coil. This means the air flowing through the coil is not reduced in temperature adequately to cool the building efficiently. Due to the inadequate cooling of the air, the building will not reach the required temperature. Therefore, the compressors will run continuously in order to compensate for the poor temperature transfer. In a system where the air is cooling the building efficiently, the compressors will cycle in and out of service as required. Poor heat transfer results in poor energy usage. A coil that is maintained and cleaned offers energy savings and reduced costs.

Poor indoor air

Bacteria, mould and fungi that colonise on the cooling coil create endotoxins, mycotoxins and a range of toxic allergenic organic fragments. These fragments are collectively known as Macromolecular Organic Dust (MOD). MOD compromises the quality of air within the building, leading to a range of chronic health problems. Some adverse health effects associated with MOD are headaches, eye irritations, blocked sinuses, nausea, respiratory complaints, allergies, fatigue and skin irritations. Coil cleaning offers better health for your staff and lower rates of absenteeism. A healthier staff offers more productivity and mitigation for OH&S requirements.
As you can see the benefits of coil cleaning greatly reduce operating costs. It is a win-win situation with advantages for both staff and building owners.

The process

All Duct Cleaning Services (Aust) Pty. Ltd. is an accredited Aeris Guard applicator. All our technicians are trained by Aeris Technologies in the correct methods of Aeris Guard application. We use and recommend the Aeris Guard product range. Aeris Guard's performance and longevity offer the best solution to our customer’s needs.


The air handling unit (AHU), which houses the cooling coil, is cleaned of debris using specialised dust extraction equipment.


The internal insulation of the air handling unit is inspected and repaired as necessary.


The condensate tray is checked for integrity and the condensate drain checked for blockages.


The evaporator coil fins are then checked for damage and repaired as required.


The AHU internal surfaces are cleaned using Surface Cleaning Solution.


The internal surfaces are then treated with a bioactive surface treatment, which prevents the growth of bacteria, mould and fungi for up to 12 months.


The evaporator coil is cleaned using an enzyme based cleaning product. This cleaner strips away existing bacteria, fungi, other contaminates and removes any pre-existing coatings, ensuring a clean surface for the coil treatment. The cleaning solution is non-corrosive and completely biodegradable.


The coil treatment is applied to the cooling coils. The treatment leaves a thin coating on the coil surface. The treatment is formulated to release a small amount of biocides over a period of at least 12 months.

Contact us 24/7

Call our office 24 hours a day, 7 days a week

South Coast, Sydney Metropolitan and Blue Mountains areas
Call : (02) 8407 9727 
North Coast, Newcastle and Central Coast
Call : (02) 4971 4525
24/7 after hours service available
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