Ducted heating and cooling systems are a standard feature of Melbourne rental properties — and a source of genuine uncertainty for landlords and property managers about maintenance obligations. Most landlords understand they are responsible for system servicing, but fewer are clear on whether duct cleaning specifically falls within their legal obligations, how often it should be done, and what happens when a tenant raises a maintenance request relating to air quality.
This guide covers Victorian landlord obligations for ducted systems, the specific gas appliance safety requirements under current regulations, recommended cleaning frequency for rental properties, and tenant rights when the system is not maintained.
Landlord Obligations Under Victorian Law
Victorian landlords are subject to the Residential Tenancies Act 1997 and the Residential Tenancies Regulations 2021, which set out obligations for property maintenance and appliance safety. These regulations were significantly updated in 2021 with new minimum standards and safety requirements.
General duty to maintain
Under the Residential Tenancies Act, landlords must ensure the rented premises are in a reasonable state of repair and comply with all building, health, and safety laws. Ducted heating and cooling systems are part of the property’s infrastructure, and a system that distributes contaminated air to tenants’ living spaces could constitute a breach of the duty to maintain the property in a habitable condition.
Minimum standards for heating
The 2021 regulations introduced minimum standards requiring rental properties to have a fixed heater in good working order in the main living area. If the property has ducted gas heating, it must be functional and maintained. A system with contaminated ductwork that restricts airflow or causes health complaints may not meet this standard.
Practical implication
While Victorian regulations do not specify duct cleaning every N years as a prescribed maintenance task, the general duty to maintain means that a system in a condition that causes tenant health complaints — dust discharge, musty odours, or reduced airflow — needs to be addressed. Proactive duct cleaning every 3 to 5 years is the most practical way to stay ahead of this obligation.
Gas Appliance Safety Requirements
For properties with ducted gas heating, Victorian regulations impose a specific legal requirement that goes beyond general maintenance obligation:
Mandatory gas heater service every 2 years
Under the Residential Tenancies Regulations 2021, landlords must have all gas heaters in a rental property — including ducted gas heating systems — inspected and serviced by a licensed gasfitter every 2 years, or as recommended by the manufacturer if more frequent. This is a legal requirement that came into effect in March 2021.
The 2-year gas service is distinct from duct cleaning. A gas service covers the heater unit, heat exchanger, burner, and flue connections — focusing on combustion safety and carbon monoxide risk. Duct cleaning is a separate service covering the distribution system. Both are necessary, but they address different aspects of the system. See our guide on carbon monoxide risk from ducted heating in Melbourne.
Compliance records
Landlords must keep records of gas heater service dates and provide tenants with a copy of the service record. If you cannot produce records showing a gas service within the last 2 years, you are potentially in breach of the regulations regardless of whether the system appears to be functioning.
Recommended Duct Cleaning Frequency for Melbourne Rentals
The practical recommendation for Melbourne rental properties with ducted systems:
Standard residential rental
Every 3 to 5 years for a property without pets, in a standard suburban Melbourne location, without recent renovation work. A practical approach for property managers is to schedule a duct clean at the start of every second tenancy, or when service records cannot confirm a clean within the past 4 years.
At change of tenancy (high priority situations)
Where the outgoing tenant had pets, where the property has been renovated during the tenancy, or where the incoming tenants have disclosed allergies or asthma. A duct clean at change of tenancy in these situations is a modest cost ($300 to $500) against the risk of a maintenance dispute early in the new tenancy.
After pets, before the next lease
Pet dander accumulates quickly in duct systems. Duct cleaning after a tenancy with pets is good practice before the next tenant moves in, particularly if the next tenants have disclosed allergies. It is a defensible maintenance action that reduces the risk of early tenancy complaints.
Tenant Rights and Maintenance Requests
Melbourne tenants have clear rights to maintenance of heating and cooling systems under the Residential Tenancies Act 1997 and the 2021 Regulations. Understanding these rights helps landlords anticipate and respond to requests appropriately.
Right to request maintenance
Tenants can request maintenance of any system that forms part of the rental property, including ducted heating and cooling systems. If the system is producing visible dust, musty odours, or causing health complaints, a maintenance request is legitimate. Landlords must respond to urgent repairs within 24 hours and routine repairs within 14 days under the Act.
Escalation pathways
If a landlord fails to act on a legitimate maintenance request within the required timeframe, the tenant can apply to Consumer Affairs Victoria for dispute resolution, or escalate to VCAT. Documented evidence of the maintenance request and the landlord’s non-response strengthens the tenant’s position. Proactive maintenance is always less costly than a VCAT proceeding.
Disclosing service records
Property managers who maintain clear records of duct cleaning and gas heater services, and who provide these to new tenants at lease commencement, are in a stronger position if a maintenance dispute arises. It demonstrates a proactive approach to the general maintenance duty.