A Renter's Guide to Ventilation: What to Check Before You Sign
Why Ventilation Matters More Than You Think
Ventilation is the single biggest factor in preventing mould, managing humidity, and maintaining comfortable indoor temperatures. Yet most renters never think to check it during an inspection.
Poor ventilation leads to: - Mould growth — especially in bathrooms, kitchens, and wardrobes - Condensation on windows — a clear sign of trapped moisture - Stuffy, uncomfortable rooms — poor sleep and concentration - Higher energy costs — poorly ventilated homes trap heat in summer
Your Inspection Checklist
✅ Bathrooms - [ ] Is there an exhaust fan? Turn it on — does it actually pull air? - [ ] Hold a tissue near the fan — it should stick when running - [ ] Check for mould around the ceiling, shower recess, and silicone joins - [ ] Is there an openable window?
✅ Kitchen - [ ] Is there a rangehood or exhaust fan above the stove? - [ ] Does it vent externally (not just recirculate)? - [ ] Check behind the stove for grease buildup (poor extraction sign)
✅ Bedrooms & Living Areas - [ ] Do windows open? Try them during the inspection - [ ] Can you create cross-ventilation? (windows on opposite sides) - [ ] Look for trickle vents in window frames - [ ] Check for condensation stains around windows
✅ Laundry - [ ] Is there an exhaust fan or vent? - [ ] Where would you dry clothes? Is there outdoor space or a well-ventilated area?
Red Flags to Walk Away From
🚩 No exhaust fan in the bathroom — this will cause mould within months
🚩 Black spots on ceilings or walls — mould is already present
🚩 Musty smell — indicates trapped moisture and poor airflow
🚩 Painted-over mould — often visible as bubbling or discoloured paint
🚩 All windows painted shut — no natural ventilation possible
How PropLedger Helps
Our Ventilation & Moisture module scores properties on exactly these factors. When a property has a health certificate, you can see: - Whether exhaust fans are present and adequate - Cross-ventilation potential - Humidity risk for the suburb - Mould likelihood based on building type and age
Renters can view any property's health report for free. Ask your landlord or agent if the property has been assessed. If it hasn't — that's worth knowing too.
Check your property's health score
Free for renters. From $49/year for owners.