To lower winter humidity in a UK home, reduce moisture sources (lids on pans, dry clothes outside/vented dryer, short showers), ventilate daily (open windows, use extractor fans), keep the house consistently warm (around 19°C), and use a dehumidifier for extra help, while ensuring good airflow and insulation to prevent damp spots.
Raise the temperature of cold surfaces where moisture condenses. Use insulation or storm windows. (A storm window installed on the inside works better than one installed on the outside.) Open doors between rooms (especially doors to closets which may be colder than the rooms) to increase circulation.
How to reduce condensation and damp in your home this winter
Don't keep it running all of the time
One of the questions that I get asked the most is how long a dehumidifier should be left running for. Marc Duckworth, the Product Manager at Philips, says, "humidity levels can be on the rise in the winter.
Heating a room allows you to get rid of some of the water held in the air; basically, turning on your heating will reduce the level of humidity. The ideal scenario would be to maintain a constant temperature of at least 19 degrees.
Is 70% humidity comfortable? No. It's too high for most homes and encourages mold/dust mites; bring it down toward 40–50% RH.
Here are some tips to help you maintain a comfortable and healthy home by managing and its lowering humidity levels.
During the winter, it's ideal to keep the indoor humidity level between 30% and 40%. This range provides a balance that is comfortable, helps prevent condensation, and reduces the risk of issues like dry skin or discomfort.
Avoid running a dehumidifier if indoor humidity is already within the ideal 30%–50% range, as lowering it further can dry the air excessively. Don't use it in extremely cold spaces below the unit's operating temperature, and avoid areas with very little moisture where it won't make a meaningful difference.
2. Set The Humidity Level Correctly. Ideal winter humidity range: Aim for a humidity level of around 30-50% during winter. This range is optimal for preventing condensation while maintaining comfortable air quality.
Should You Wipe Condensation Off Windows? Yes, wipe off any condensation on your windows with a soft microfibre cloth. It's one of the first things you should do. Not only does it protect your windows and sills, but it also helps maintain healthier indoor air quality by stopping mould from growing.
Bathing, showering, cooking and drying clothes are examples of activities that can cause moisture.
You can reduce humidity in a room without a dehumidifier by ventilating it properly, turning on the air conditioner (if you have one), buying moisture-absorbent plants, or using baking soda or desiccants to remove excessive moisture.
High humidity in a house can be caused by many things, but the biggest reason is poor ventilation—in other words, air isn't being circulated properly, which causes the air in your house to become stagnant and humid. The other major reason? Too much air exchange with the outside.
When the relative humidity is more than 50%, moisture problems may occur. Generally, in cold winter conditions, the relative humidity levels need to be low to prevent condensation and potential damage to the house's structure, as well as to discourage mold growth, which can cause allergies and respiratory problems.
Typically, affected areas include walls, window frames, and insulation. A humidity level above 55% can activate mold growth, although the ideal moisture level will be 70% or more.
Spaces such as Bathrooms, cellars and washrooms are often the places where you need the dehumidifier the most. These spaces often contain surplus moisture by, for example, shower or washing vapors And can easily rise to a humidity of 70-80%. Recommended duration of use: 4 to 8 hours a day, depending on the humidity.
Yes, 70% humidity in a bedroom is too high; it exceeds recommended levels (ideally 30-50%, max 60%) and creates an environment ripe for mold, dust mites, mildew, and discomfort, potentially disrupting sleep and damaging your home.
Do You Need a Dehumidifier? 5 Signs Your Home Has Too Much Humidity
By occasionally opening up windows or doors in your home during winter, you will reduce indoor humidity by allowing moist air to escape and bring in drier outdoor air. This helps balance humidity levels in your home and prevent excess moisture buildup.
The ideal bedroom humidity is between 30% and 50%. This is the recommended indoor humidity for your entire home, according to the Environmental Protection Agency (EPA).
During the summer, humidity is considerably high because warm air holds a higher level of water vapour. All soft leaved plants help take moisture out of the air. Houseplants not only add aesthetic appeal to your living space but also offer a myriad of health benefits, including purifying the air you breathe.
10 Ways to Reduce Your Indoor Humidity
Opening windows promotes more airflow, which enhances ventilation inside the building. This guides in eliminating sticky, humid air and supplanting it with drier external air. Ventilation is essential in regions like kitchens, showers, pantries, and other rooms where dampness is delivered.
Baking soda, calcium chloride, and rock salt are all budget-friendly and readily available dehumidifying products. Put them in a bowl or bucket (or any container you see fit!), and you've got a natural dehumidifier that will start absorbing moisture from the air in your most humid rooms.