IAQ HVAC Hygiene Assessments

HVAC Hygiene Assessments

IAQ are experts in the effective functioning and integrity of HVAC systems and their impact on indoor air quality. We provide independent auditing of the total HVAC system that has been utilised by building owners, facility managers and engineers.

We provide a written report of the entire survey with recommendations. When applicable, we also provide video and photographic evidence.


Air duct and system inspections are an effective yet affordable strategy to identify or locate indoor air quality problems and system inefficiencies.

The most commonly identified problems in HVAC testing are:

  • Restricted air flow
  • Inadequate ventilation
  • Blockages of cooling coils, heating coils, mixing boxes, VAV boxes and clogged return air filters
  • Microbiological contamination
  • High levels of airborne particulate matter
  • High levels of microbiological matter
  • High levels of carbon dioxide
  • Damaged internal duct insulation, allowing fibrous material to become airborne and circulate into the conditioned space
  • Inappropriate location of control devices
  • Contaminated air ducts and air handling components

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Issues most commonly arise from the conglomeration of particulate matter (dust) on and close to cooling coils. In conjunction with localised moisture, the growth of mould, fungi and other microbiological organisms is promoted. All of these are considered detrimental to the health and well being of the occu pants, particularly in regard to effects on eyes, nose and respiratory systems.

The accumulation described arises from the absence of a regular specialised maintenance regime that measures air quality, inadequate maintenance procedures, air leakage from ductwork and poor quality or ill-fitting air filters.


Poor maintenance has direct effects on:

  • System efficiency and longevity
  • Reduced air circulation
  • Increased energy use
  • Extended operating periods of major equipment
  • Compromised air quality, dissatisfied occupants, increased absenteeism
  • Reduced heat transfer from the cooling/heating medium to the air
  • Inconsistent conditions in the occupied space
  • Reduced efficiency
  • Discontentment among staff
  • Potential litigation

IAQ Technologies can help

For a no obligation discussion, call 0417 331 428