Commercial HVAC Maintenance: Responsibilities and Records
A useful HVAC maintenance program makes it clear what equipment is included, who is responsible and how inspection findings are recorded. Online frequency tables are not a substitute for a site-specific plan.
| HVAC COMPONENT | INSPECT | CLEANED / REPLACED | |
|---|---|---|---|
| Outdoor air intakes and exhausts | Monthly | When Necessary | |
| Air filters | Monthly | When Necessary | |
| Humidifiers | Monthly | When Necessary | |
| Evaporative air-cooling equipment | 3 Months | When Necessary | |
| Sump | 3 Months | When Necessary | |
| Wetted pads | 3 Months | When Necessary | |
| Water strainer | 3 Months | When Necessary | |
| Air filter | 3 Months | When Necessary | |
| Drainage system | 3 Months | When Necessary | |
| Ducts and components | |||
| Coils | Monthly | When Necessary | |
| Trays and sumps | Monthly | When Necessary | |
| Condensate drains, tundishes, and traps | Monthly | When Necessary | |
| Ductwork | Annually | When Necessary | |
| Fans | 3 Months | When Necessary | |
| Terminal units inc. coils | Annually | When Necessary | |
| Terminal units components including coils | Annually | When Necessary | |
| Return air and relief air grilles | Annually | When Necessary | |
Confirm the applicable requirements
AS/NZS 3666.2 addresses operation and maintenance of building air-handling and water systems for microbial control. It is not a kitchen exhaust cleaning standard or a guarantee against infection. Confirm the applicable edition, equipment requirements and site maintenance plan with the responsible maintenance professional rather than copying an online schedule.
Create an equipment and responsibility register
List the air-handling units, filters, coils, trays, drains, fans, ducts and terminal components covered by the plan. Allocate inspection, cleaning, testing and repair tasks to the appropriate provider. Clean Air Filtration’s cleaning services do not replace all mechanical or electrical maintenance.
Set inspection intervals deliberately
Use the applicable standard, manufacturer’s instructions, operating conditions and prior findings. Inspection and cleaning are different tasks: an inspection may lead to cleaning, repair or further assessment. Do not interpret a maximum interval as permission to leave a known problem unattended.
Record findings and remedial actions
Keep the date, provider, system identification, scope, observations, testing where applicable, defects and follow-up. Record access limitations and outstanding work so they remain visible to the next person responsible for the building.
Include separate extraction systems
Laundry and toilet exhaust systems can be overlooked when the focus is only on the main HVAC plant. Add them to the site register and discuss their cleaning scope alongside laundry and toilet exhaust cleaning.
Review the program as the building changes
Fit-outs, operating-hour changes and recurring findings may warrant a revised plan. Keep service reports accessible and confirm what records the relevant authority or auditor requires.
Arrange a commercial service
Clean Air Filtration provides commercial HVAC duct cleaning in Melbourne and Victoria. Tell us your site location, system details, access restrictions and operating hours so we can discuss the cleaning scope. Call (03) 9303 9661 or email sales@cleanair.com.au.
Every client receives a client portal, including one-off services. Completed-service PDF reports and job photos are available there. See our service records guide for what to keep with your maintenance history.
Cover image: AI-generated editorial illustration of representative equipment or premises, not a client-site photograph.