Healthy Homes Ventilation Requirements Explained (NZ Guide)

Q: Do I need ventilation in bedrooms?

The Healthy Homes Standards do not require specific ventilation in bedrooms, but good airflow throughout the home is recommended to prevent condensation and mould. Whole‑house ventilation systems can help maintain consistent air quality.

Q: Are heat recovery systems compliant?

Heat recovery systems can contribute to overall ventilation, but they do not replace the requirement for extraction fans in bathrooms and kitchens. You still need dedicated extraction that vents directly outside to meet Healthy Homes standards.

Q: What happens if a fan vents into the roof space?

Venting into the roof space is non‑compliant and can cause moisture buildup, mould, and structural damage. Extraction fans must vent directly outside to effectively remove moisture and comply with the standards.

4-minute read • Updated April 2025

The Healthy Homes Standards require rental properties in New Zealand to have adequate ventilation, especially in wet areas.

Bathroom requirements

Extractor fan required
Must vent outside
Must remove moisture effectively

Kitchen requirements

Extractor fan required
Must vent outside
Recirculating systems alone are not compliant

What the standard does not cover

The standard does not require whole-house ventilation.

Why extraction alone is not enough

Extraction removes moisture at the source but does not control humidity throughout the entire home.

👉 Learn more: How to Stop Condensation

Common mistakes

Fans venting into roof space
Poor ducting
Undersized systems

Related guides

How to stop condensation in your home
Positive Pressure vs Balanced Ventilation – which is right for your home?
How much ventilation does my house need?

Frequently Asked Questions

Do I need ventilation in bedrooms?

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Are heat recovery systems compliant?

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What happens if a fan vents into the roof space?

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