Humidity / Mould
Condensation on windows, musty smells, or visible mould are signs of a moisture problem.
Your Diagnosis
Your humidity and mould problem is most likely caused by poor ventilation in bathrooms or kitchens, a hidden leak, or insufficient airflow in enclosed rooms. High humidity above 65% creates ideal conditions for mould growth.
5 practical solutions
Run bathroom and kitchen exhaust fans during and after use
Cooking and showering release large amounts of moisture. Run exhaust fans for 20 minutes after finishing to remove humid air before it condenses on surfaces.
Use a dehumidifier in damp rooms
Keep indoor humidity between 40–60%. A dehumidifier in a basement or bedroom can prevent mould growth and improve air quality significantly.
Fix leaks promptly — even small drips matter
A dripping tap or slow pipe leak can add litres of moisture to your home daily. Check under sinks, around toilets, and behind appliances regularly.
Improve ventilation in problem areas
Open windows when weather permits, and consider adding trickle vents or an HRV (heat recovery ventilator) for continuous fresh air without heat loss.
Clean existing mould safely with vinegar or specialist products
For small patches (under 1 square metre), white vinegar is effective and non-toxic. Spray, leave for an hour, then scrub. For larger areas, consult a professional.
What You Should Do First
Run your bathroom exhaust fan for 20 minutes after every shower — not just during.
Check under sinks, around toilets, and behind appliances for slow drips or leaks.
Open windows in the morning when outdoor humidity is lower to exchange stale air.
Clean existing mould patches with white vinegar — spray, leave 1 hour, then scrub.
👉 Start with a smart plug — this gives the fastest savings with zero effort after setup.
⚠️ Every day you delay = unnecessary electricity cost. The fixes above take less than 30 minutes.
Recommended Tools
These tools directly address your problem. Most pay for themselves within 1–3 months.
Sterra Sun Dehumidifier
Keeps humidity at 40–60%, preventing mould growth
⏱ Payback: 1–3 months
- ✔Reduce humidity and mould
- ✔Improve comfort
- ✔Help aircon work more efficiently
HEPA Air Purifier
Filters mould spores and improves indoor air quality
⏱ Payback: 1–3 months
- ✔Reduce humidity and mould
- ✔Improve comfort
- ✔Help aircon work more efficiently
TP-Link Tapo P110 Smart Plug
Schedule dehumidifier to run during peak humidity hours
⏱ Payback: 1–3 months
- ✔See real-time electricity usage
- ✔Identify hidden energy waste
- ✔Set automatic schedules
Want more detailed guides?
Sign up for our free newsletter and get in-depth guides delivered to your inbox.
Get the free guide