DUCT & EXHAUST CLEANING & MAINTENANCE FAQS IN SYDNEY, NEWCASTLE, WOLLONGONG & SURROUNDS
How Often Should I Have My Ducts Cleaned?
There is no set time frame for duct cleaning. Various factors determine the accumulation of contaminants within your system. These include:
-
Hours of usage
-
System maintenance - filter condition, duct leakages and door/window leakages
-
Dust sources - Floor covering type, number of people and air movement
-
System design - adequate ventilation for photocopiers, cutting machines, smoking, fresh air intake location, etc
Central air conditioners circulate cool air through a system of supply and return ducts. Supply ducts and registers (i.e., openings in the walls, floors or ceilings covered by grills) carry cooled air from the air conditioner to the room. This cooled air becomes warmer as it circulates through the rooms; then, it flows back to the central air conditioner through return ducts and registers. A central air conditioner is either a split-system unit or a packaged unit.
In a split-system central air conditioner, an outdoor metal cabinet contains the condenser and compressor, and an indoor cabinet contains the evaporator. The air conditioner's evaporator coil is installed in the cabinet or main supply duct.
In a packaged central air conditioner, the evaporator, condenser and compressor are all located in one cabinet, usually placed on a roof or a concrete slab outside the building. This type of air conditioner also is used in domestic or small commercial buildings. Air supply and return ducts come from indoors through the building's exterior wall or roof to connect with the packaged air conditioner, which is usually located outdoors. Packaged air conditioners often include electric heating coils.
System
Commercial/ Indusctrial
Supply Ducts
On Inspection
Return Ducts
1 yr
Coils
1 yr
Ventilation Systems
2 yrs
Sanitisation
1 yr
Filters
1 yr
Usage
Hours Per Day
Cleaning Frequency
Heavy Use
12-16
3 Monthly
Moderate Use
6-12
6 Monthly
Light Use
2-6
Annually
How Often Should Evaporator Coils Be Cleaned?
Due to the environment created on and around the evaporator coil, it is necessary to clean and sanitise at least every 12 months. This ensures there is no contaminant build-up causing airflow restrictions and that there is no bacteria, fungi or mould growth.