Living in Ireland can mean a struggle with damp and cold rooms, which sometimes leads to condensation and mould appearing on walls or windows. While turning up the heater may seem like the easiest fix, there’s a smarter, cheaper solution — a dehumidifier. It not only removes moisture from the air but also helps control humidity, making rooms feel warmer and free from damp.
Why Humidity Makes Homes Feel Cold
Even with the heating on, high indoor humidity can make a room feel colder, because damp air draws heat away from your body.
Research shows that humid air takes more energy to warm up. Running a dehumidifier helps remove excess moisture, so your heater doesn’t have to work as hard — saving on energy bills.
By keeping indoor humidity under control, a dehumidifier not only makes your rooms feel warmer but also more comfortable, reducing the need for constant heating.
Humidity Is the Main Cause of Mould in Homes
Mould thrives in warm, damp conditions. According to the World Health Organization, high indoor humidity is the main factor that allows mould to grow.
An Irish study of 14 deep‑energy retrofitted homes found that, even after significant energy upgrades, relative humidity often stayed within the 30–60% range, which was strongly linked to occupant comfort and a reduced risk of moisture-related problems.
Another analysis of airtight, A‑rated Irish homes warns that, without proper ventilation, humidity levels can rise dangerously, increasing the risk of mould forming on cool internal surfaces.
These findings show that, in an Irish context, controlling humidity is just as important — if not more so — than managing temperature to prevent damp and mould.
Evidence from Real Homes
A UK home study showed that running a dehumidifier each night removed about 680 ml of water, used roughly 1 kWh of electricity, and eliminated severe condensation.
The estimated cost for half the winter nights was around €28, showing that dehumidifiers can be both effective and affordable.
Why This Matters in Irish Homes
- Damp and mould are common in Ireland. A Dublin survey found that 83% of residents reported mould and damp.
- Research in student rental homes found that 75% experienced condensation and 50% reported mould.
- The Sustainable Energy Authority of Ireland (SEAI) recommends proper ventilation to prevent mould and condensation.
- Local housing groups, like Circle Voluntary Housing, advise airing rooms, using extractor fans, and reducing moisture from cooking or showering.
Practical Tips for Using a Dehumidifier in Irish Homes
- Run it daily, especially in winter or in damp rooms like bathrooms, kitchens, and bedrooms.
- Keep doors and windows closed while it runs for maximum efficiency.
- Empty and clean the water tank regularly.
- Combine with ventilation, like using trickle vents or briefly opening windows.
- Place away from walls and furniture so air can circulate freely.
Following these tips helps control humidity, reduce mould risk, make rooms warmer, and lower heating bills.
Conclusion
In Ireland, where dampness and mould are common, controlling humidity is essential. A dehumidifier is an effective, affordable tool that keeps your home healthier, warmer, and more energy-efficient. Combined with proper ventilation and good home habits, it can make a real difference in comfort and costs — especially in older or poorly insulated buildings.
For more tips on tackling mould and mildew, check out our previous post on mould prevention and removal.
Think this is useful? Share it with your friends, family, or anyone who could benefit from a drier, healthier home.