During the summer, set your dehumidistat between 40% and 50% relative humidity (RH). This range is recommended by the EPA to keep the air feeling comfortable, prevent the sticky "muggy" feeling, and deter mold growth.
While everyone's home comfort preferences will vary, we recommend a dehumidistat setting between 35 and 45 percent for Summer.
Set your dehumidifier between 40% and 50% relative humidity (RH) for the summer. This range perfectly balances keeping the air feeling crisp and comfortable while actively preventing mold and mildew growth.
In summer, humidity levels can spike, leading to discomfort. It is advisable to set the humidistat to a lower level, between 40% and 50%, which can help prevent the muggy feeling associated with high humidity. Dehumidifiers may be necessary during particularly humid days to maintain a comfortable environment.
Yes, 70% humidity is considered high in the summer.
For example, a warm and humid summer with 80% humidity at 86°F, would mean that the outdoor air contained 0.8oz/m3 of water. In our homes, 86°F would be very uncomfortable so many would use air conditioners to cool it down again.
Opening a window can reduce indoor humidity—but only if the outside air is cooler and holds less moisture than the inside air. To check if it will help, look at the local Weather Forecast: if the outdoor dew point is below 60∘F60 raised to the composed with power F𝟔𝟎∘𝐅, opening a window will usually lower your indoor humidity.
Generally, no. Mold does not actively grow in 40% humidity. The US EPA recommends keeping indoor relative humidity (RH) between 30% and 50% to strictly prevent mold from taking hold.
However, the air in the summer is moist, which makes using your humidifier unnecessary. The use of your humidifier during the summer months can actually reduce the effectiveness of your AC and lead to increased energy bills. For this reason, it's essential to shut down your humidifier once heating season is over.
No, running a standard fan does not lower humidity. Fans only move air to create a wind-chill effect on your skin; they do not remove moisture from the air. In fact, leaving a central AC fan running constantly can re-evaporate moisture back into your home, raising humidity.
Use a dehumidifier when indoor relative humidity consistently exceeds 50%. This is typically from late spring through early fall (May to October), when warmer air holds more moisture. However, damp, poorly ventilated areas like basements and crawl spaces may require year-round operation.
Ideal basement humidity levels fall between 30 - 50%. Dropping below 30% can cause gaps between windows and doors, creaky wood floors and damage to your belongings. On the other hand, reaching above 50% can lead to mildew, mold and bacteria growth, negatively impacting both your health and your home.
For most homes, the ideal setting for a dehumidifier is between 40% and 50% relative humidity (RH). This range is comfortable for humans, deters allergens like dust mites, and prevents mold growth without drying out your skin or cracking wooden furniture.
The best humidity level for the home in winter to keep your home warm and cozy is somewhere between 30% and 40%, In summer, between 40-50% should be comfortable.
A humidistat measures humidity, and turns something on when the humidity drops below a certain level. You use it to turn on a device that increases humidity, or humidifies, like a whole-home humidifier. A dehumidistat measures humidity, and turns something on when the humidity goes above a certain level.
The ideal indoor humidity level for sleeping is between 30% and 50%. Maintaining this range helps prevent dry skin, irritated sinuses, and congestion, all of which can disrupt restful sleep. Too little humidity can dry out airways, while too much can promote mold growth and dust mites.
The Health and Safety Executive recommends that relative humidity indoors should be maintained at 40-70%, while other experts recommend that the range should be 30-60%. Most people find 30-60% most comfortable and this is the level that Airthings recommends.
The 3-minute rule is a simple but important guideline: wait at least three minutes after turning your air conditioner off before turning it back on. That short pause gives the refrigerant pressure in the system time to equalize.
No, 72°F is not generally considered too cold for the summer—it actually sits right in the "sweet spot" for comfortable indoor living. However, whether it is ideal for your home depends on your system's efficiency and your personal preferences.
Research has shown that English Ivy can eliminate up to 78% of airborne mold within 12 hours. This makes it particularly useful in humid areas like bathrooms and basements where mold growth is more common.
To prevent mold growth, indoor humidity must be kept below 60% relative humidity (RH). The ideal target range is between 30% and 50% RH.
Mold toxicity (mycotoxin illness) happens when prolonged exposure to mold spores triggers chronic inflammation and immune system activation. Symptoms are often subtle and mimic other illnesses, but common red flags include persistent allergy-like reactions, chronic fatigue, unexplained brain fog, recurring headaches, and respiratory or digestive distress.
Sleeping with windows open can introduce outdoor pollutants, allergens, and noise that disrupt rest. It also creates security vulnerabilities and allows pests inside. Furthermore, uncontrolled drafts can cause muscle stiffness and dry out your nasal passages.
Germans open windows in the dead of winter for a practice called Lüften (airing out). It involves briefly opening multiple windows wide to completely exchange stale, moist indoor air with fresh, cold outdoor air. This ritual serves several practical purposes:
Cold air in winter can absorb less moisture. If this outside air gets indoors, it becomes even drier with the heating. This is due to the fact that the cold air from outside contains very little water vapour.