This level prevents the growth of mold and mildew. What should my indoor relative humidity be? The dry air pulls moisture from your skin, leaving you colder and forcing you to turn up the temperature to stay comfortable. When indoor air is too dry, asthma and allergy symptoms can worsen. It is much easier for people to get comfortable when they are active and on the go. In general, a relative humidity level between 30 to 50 percent is ideal for comfort and to prevent microorganism growth. Meaning, high or low relative humidity can be uncomfortable. Humidity is a factor in thermal comfort. A humidity level no higher than 50% is optimal as a general rule of thumb, but the best level depends on the temperature outside. Yes, a fine, sunny day with dry air will be more comfortable but a wet day won’t be too bothersome. Ideally, between 30% and 50%. However, finding a comfortable working temperature and humidity in an active and spacious office is different than a cramped cubicle office where people are chiefly at rest and sitting. It is important to make sure that you’re aware of humidity levels as low or high relative humidity level may cause some negative health effects. Generally, maintaining the relative indoor humidity between 40% and 60% is highly recommended, with the ideal level being around 50%. In the rest of the article, I will let you know what you need to know and where to maintain your humidity level in the finished basement and other living areas to be absolutely comfortable. The most comfortable indoor humidity level will vary from one household to the next, depending on personal preferences. It has also been associated with eye irritation and nosebleeds, since it may cause the tissue lining the nasal passages to dry and crack. You may notice visible condensation on windows and walls. Once humidity levels in the home are brought down to below 60%, airborne bacteria and viruses will not only stop breeding, but will struggle to survive. This causes your sinuses to dry; in addition, you might have dry skin, nosebleed, or a sore throat. The typical range for the best comfort during the summer, as listed in the home humidity levels chart, is between 30-45%. In other words, the human body uses perspiration as a way to self-regulate its temperature. Most noteworthy, in the summer the ideal Relative Humidity level is < 60%, these values significantly drop down to 25 and 40% during the winter. The excess moisture then drips into a collection tank which will have to be emptied from time to time. Running an air conditioner or dehumidifier in the bedroom, even if it is just for a couple of hours before you go to sleep, can help bring down the humidity to a more comfortable and sleep-friendly level. Forty-five percent relative humidity is the comfortable relative humidity level. The humidity level inside your house is just as important as the temperature. We need humidity for our comfort and health but too much or too little can produce many difficulties for homeowners. They also — vitally — help to dry interior structures like drywall and lumber to prevent them from deteriorating due moisture and subsequent mold [sources: Keefe, EPA].. Meaning, high or low relative humidity can be uncomfortable. Cold and flu viruses may spread more rapidly, and you may be more prone to sinus infections. This means, the higher the temperature inside, the higher your humidity level goes. According to the Environmental Protection Agency, indoor relative humidity should be kept below 60%. Limit the consumption of caffeine and alcohol during long flights because of its diuretic effect. Humidity is the amount of water vapor (dampness) in the air at any given time. In order to find out the humidity level in your home, you will need a hygrometer, which measures temperature and relative humidity. High humidity indoors causes the home to feel muggy. Humidity levels are variable from place to place, as well as from season to season. Low relative humidity levels (below 30 percent) can cause excessive thirst and dry skin, lips, and eyes. Indoor winter temperatures are colder, so it is usually more appropriate to have lower indoor humidity levels. Sorry to see that you are blocking ads on The Engineering ToolBox! Wood and other building materials as well as furniture are robbed of moisture when the air is dry. Maintaining the right humidity levels ensures that you have a healthier and more comfortable environment. Humidity. It refers to the absolute humidity at a given moment relative to a maximum humidity given the same temperature. And having too high humidity in the colder seasons can also cause complication. High relative humidity reduces people’s ability to lose heat through perspiration and evaporation. What is the Ideal Humidity Level for Your House? Aside from personal preference, levels of humidity that are too high or low can cause health problems and cause damage to your home. First, let's lay out a general rule for the ideal indoor relative humidity. Utilize a humidifier in winter months when air is naturally drier, and a dehumidifier in the summer when air naturally carries more moisture. People tend to feel most comfortable at a relative humidity of between 30 and 50 percent. The level of humidity, whether outdoors or inside your home, is a big factor in your comfort level. If an HVAC system is not in place, or not enough to combat high humidity levels, then a dehumidifier may help. Their price is usually proportional to the size of the area they can cover (in square or cubic feet) and the capacity of their collection tank. However, it depends entirely on your location and climate. According to the Environmental Protection Agency, indoor relative humidity should be kept below 60%. To keep your HVAC unit working efficiently and to improve the air quality, you need to know what the most comfortable humidity level is. When placed in a room, a dehumidifier will suck in air, take the moisture out of it, and then blow the air back out. This can vary depending on your family’s personal preferences and lifestyle. Ideal indoor humidity levels by outdoor temperature, Maintaining ideal relative humidity levels in the home, Outdoor temperature over 50˚F, indoor humidity levels shouldn’t exceed 50%, Outdoor temperature over 20˚F, indoor humidity levels shouldn’t exceed 40%, Outdoor temperature between 10˚F and 20˚F, indoor humidity levels shouldn’t exceed 35%, Outdoor temperature between 0˚F and 10˚F, indoor humidity levels shouldn’t exceed 30%, Outdoor temperature between -10˚F and 0˚F, indoor humidity levels shouldn’t exceed 25%, Outdoor temperature between -20˚F and -10˚F, indoor humidity levels shouldn’t exceed 20%, Outdoor temperature at -20˚F or lower, indoor humidity levels shouldn’t exceed 15%, Sleep mode option that turns off light display and triggers sensors for detecting the optimal level of humidity, Spiral air duct technology that turns water into fine mist without fogging the room or wetting the floor, 2-year buyer’s assurance and lifetime support from Levoit, Eliminates extra moisture that cause mold and mildew, Control of exact percentage of humidity in your room that gives you effortless control, Full tank alert system and auto shut-off capabilities. It is important to ensure that you are aware of the humidity levels both in the environment and in your home, as high or low relative humidity levels can cause negative health effects. You want to keep the indoor relative humidity low enough to prevent visible and invisible moisture problems and high enough to prevent excess static electricity or dry skin. There’s a wide variety of dehumidifiers in the market. The ideal relative humidity for both health and comfort is about 30–50%. Cracks and damage can occur to flooring, trim, and even framing around windows and doors. On the low end, you probably don't want to go lower than 30-35% relative humidity (RH). A humidity level below 60% is recommended by most experts for the summer months. This site uses cookies to ensure you get the best experience on our website. Below 30 percent humidity, the air feels dry, and above 52 percent relative humidity, the air feels very moist. The Consumer Product Safety Commission recommends a humidity level between 30 and 50 percent, while the Environmental Protection Agency recommends a humidity level between 30 and 60 percent to reduce the growth of harmful mold.What causes high humidity levels? If, on the contrary, it is low levels of humidity you’re looking to combat, then a humidifier may help instead. This causes more energy to be consumed unnecessarily, increasing your energy bills. According to the Environmental Protection Agency (EPA), indoor humidity levels should be kept between 30% to 50%, with the sweet spot being 45%. This not only causes discomfort, but can be damaging to your home. Many times, relative humidity can be misleading. These contaminants diminish indoor air quality, causing illness, and can also cause damage to your home. For the purposes of this article, we’re going to focus on relative humidity. Your home will feel most comfortable at humidity levels between 30 - 50%. Forecasters watch the dew point, not relative humidity, because hot air can hold more moisture than cool air. Although you can't see it, it's still there. Humidity levels above 60% can also create a moist environment where microbial life like bacteria, fungi, mold, and dust mites thrive. A relative humidity level between 45 to 55 percent is considered comfortable for most people. If 30 percent is too low and causes minor irritations such as a scratchy throat, a humidifier can quickly bring the level up to a more comfortable percentage. What is the recommended humidity level inside a home? The DOH states that “for thermal comfort, the optimum range for relative humidity is 40 to 60 percent in the summer and 30 to 50 percent in the winter.”. Mugginess can leave you feeling hot and uncomfortable, turning up the air conditioning and expending more energy when just an adjustment in humidity levels are required. Recommended Humidity Level: The recommended and ideal humidity comfort levels inside your home should be between 30 to 50 percent. Ideally, between 30% and 50%. Knowing what is considered high humidity can increase the comfort level in your home. As an Amazon Associate I earn from qualifying purchases. Water vapor, the gaseous state of water, is generally invisible to the human eye. If you often have high humidity in your home that is not caused by any of these, you might need to have your home’s ventilation and insulation inspected. You may suffer from dry skin, chapped lips, and dry air passageways. However, if you want to be healthy and free from humidity problems, the remedy is to reduce humidity level. These systems automatically work with your home’s heating and cooling systems to add or remove moisture from the air. Relative humidity above 60% feels uncomfortable wet. This directly affects how "comfortable" it will feel outside. 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