The Healthy Homes ventilation standard is one of the most common areas where rental properties need practical checking. A property may have a fan or a window, but landlords and property managers still need to consider whether the ventilation is suitable, functional, ducted correctly and supported by appropriate records.
This guide explains the ventilation standard in practical building-inspection language. For official rule wording, always check the Tenancy Services ventilation standard.
What the Healthy Homes Ventilation Standard Requires
In general terms, rental homes need openable ventilation for habitable rooms and mechanical extraction for kitchens and bathrooms. In a real inspection, this usually means checking windows, doors, skylights, extractor fans, rangehoods, ducting, external discharge points and whether the system appears to operate as intended.
Habitable rooms
Living rooms, dining rooms, kitchens and bedrooms should have openable ventilation to the outside.
Wet and cooking areas
Kitchens and bathrooms need an extractor fan vented outdoors or a qualifying continuous mechanical system.
Practical records
Landlords should keep useful details such as fan diameter, ducting, exhaust capacity and installer information where available.
Openable Windows, Doors and Skylights
Habitable rooms generally need at least one window, door or skylight that opens to the outside and can remain fixed in the open position. The combined openable area is normally checked against the room floor area, so blocked, painted-shut, damaged or non-functional openings may create a practical compliance concern.
- Check whether the room has a window, door or skylight opening directly to outside air.
- Check whether the opening can stay fixed open without being held by hand.
- Check whether security stays, damaged hardware, painted frames or swollen joinery restrict use.
- Record rooms where access, furniture or tenant belongings restrict checking.
Kitchen and Bathroom Extractor Fans
Kitchens and bathrooms are high moisture areas. During a Healthy Homes ventilation check, the key question is not only whether a fan is present, but whether it appears functional and whether it discharges outdoors rather than into the ceiling space, roof space, wall cavity or another internal area.
Kitchen checks
- Rangehood or extractor fan present
- Ducting connected and supported where visible
- Outdoor discharge point visible where accessible
- Grease, moisture staining or poor airflow noted
Bathroom checks
- Fan present in room with shower or bath
- Fan operational at time of inspection where testable
- Ducting not disconnected in roof space where visible
- Moisture staining, mould-like marks or condensation noted
Existing Fans vs New Fans
The official ventilation standard treats older and newer extractor fans differently. For practical reporting, it is useful to record whether the fan appears old or recently installed, whether it operates, where it vents, and whether documentation is available.
| Item | Practical point |
|---|---|
| Existing fan before 1 July 2019 | Should ventilate to the outside and be in good working order. |
| New kitchen fan or rangehood | Commonly checked against 150 mm diameter including ducting or at least 50 L/s exhaust capacity. |
| New bathroom fan | Commonly checked against 120 mm diameter including ducting or at least 25 L/s exhaust capacity. |
| No documentation | Further confirmation may be required from installer records, product specifications or a suitable specialist. |
Continuous Mechanical Ventilation Systems
Some properties may rely on a qualifying continuous mechanical ventilation system instead of standard extractor fans. These systems need careful confirmation because recirculating systems and fans that do not extract outdoors are not normally suitable for meeting the Healthy Homes ventilation standard.
Where a property relies on a mechanical ventilation system, landlords should keep building consent details, system specifications, exhaust capacity information and installer or specialist documentation where available.
Practical Ventilation Checks for Auckland Rentals
Common Ventilation Problems We Find
- Bathroom fan installed but ducting terminates inside the roof space.
- Kitchen rangehood present but recirculating only, with no external discharge.
- Flexible ducting crushed, loose, disconnected or poorly supported.
- Fan is noisy, weak, not operating or not connected to a working switch.
- Windows are painted shut, swollen, damaged or unable to stay fixed open.
- Condensation, mould-like marks or staining around bathrooms, ceilings or window frames.
- External grille missing, blocked, damaged or not visible from accessible areas.
Need a Healthy Homes Ventilation Check?
Book a practical Healthy Homes assessment with Cozy Building Compliance. We can check visible ventilation issues, record limitations, and provide practical next-step recommendations for landlords, property managers and rental property owners.
What Landlords Should Keep Records Of
Healthy Homes compliance records are important. For the ventilation standard, useful records may include fan diameter, exhaust capacity, product specifications, installer details, ducting information, confirmation of outdoor discharge and any specialist advice where installation is difficult.
The Healthy Homes compliance statement may require information about how the property meets the ventilation requirement, including details of extractor fans or a qualifying ventilation system.
Related Healthy Homes Guides
Frequently Asked Questions
What is the Healthy Homes ventilation standard in NZ?
The ventilation standard requires suitable openable windows or doors in habitable rooms, and kitchens and bathrooms must have extractor fans that vent outdoors or a qualifying continuous mechanical ventilation system. This page is practical guidance only and should be checked against the official Tenancy Services information.
Do bedrooms and living rooms need openable windows?
Habitable rooms such as living rooms, dining rooms, kitchens and bedrooms generally need at least one window, door or skylight that opens to the outside and can be fixed in the open position. The combined openable area must be checked against the room size.
Do bathroom and kitchen fans need to vent outside?
Yes. Extractor fans used for Healthy Homes ventilation need to remove moisture-laden air to the outside. A fan that only discharges into the roof space or recirculates air is a common risk item and should be further checked.
What fan size is required for kitchens and bathrooms?
For extractor fans installed after 1 July 2019, kitchens with a cooktop generally need a fan or rangehood with 150 mm diameter including ducting or at least 50 litres per second exhaust capacity. Bathrooms with a shower or bath generally need 120 mm diameter including ducting or at least 25 litres per second exhaust capacity.
Can an older extractor fan still meet the ventilation standard?
A fan installed before 1 July 2019 may still be acceptable if it ventilates to the outside and is in good working order. If it stops working, it should be repaired or replaced with a fan that meets the current requirements.
Can Cozy Building Compliance help if ventilation issues are found?
Cozy Building Compliance can provide practical observations, recommendations and minor maintenance support where suitable. Specialist electrical, mechanical ventilation or legal confirmation may be recommended depending on the issue.
Disclaimer
This information is general guidance only and should not be taken as legal advice. Healthy Homes requirements may depend on the specific property, tenancy situation and any applicable exemptions. Where required, further specialist assessment, installer confirmation or legal advice may be recommended.