The first sign many people notice is a musty, mouldy odour. If you do a thorough clean of your office or commercial space and the smell is still there, it’s time to check your vents. Getting your Air Conditioning Contractor to remove the covers and take a quick look inside may confirm the issue, especially if you see mould or notice a stronger smell in that area. If the scent is stronger, but you can’t see the mould, then the growth is possibly further in the ducts. Another sign of a mould issue is the sudden onset of allergy symptoms. If you or a co-worker notices burning eyes, scratchy throat, or a runny nose that gets better when you leave the office, there could be an issue. Arranging for your HVAC technician to check your filters should be the first step. If it needs to be changed they can install a new one. If the symptoms continue they can do a quick check of your vents and a visual check of your ducts. Inspecting your duct work can also provide clues to a possible mould problem. An Air Systems Cleaning Specialist (ASCS) can check for signs of moisture build-up, such as condensation, dark spots, or actual leaks. Mould needs water to grow, so any signs of condensation or leaking could indicate a growth hot spot. Duct cleaning and coating is a specialised job and as such the majority of HVAC companies sub-contract duct cleaning and coating out to companies like ours. At Advanced Air we have our Air Systems Cleaning Specialist on staff ready to undertake any duct inspection, cleaning or coating project you may have.