(rĕl′ə-tĭv) The ratio of the actual amount of water vapor present in the air at a given temperature to the maximum amount that the air could hold at that temperature. If you live in a region that experiences all four seasons, you may find that both devices come in handy at different times of the year. Relative humidity is a way of describing how much humidity is present in the air, compared to how much there could be. The entire Bay Area has become dangerously arid, with many stations reporting, The strongest winds will occur Monday evening through Tuesday morning and will be met with critically dry vegetation and very low, When exposed to temperatures of 80 degrees Fahrenheit and 65%, Post the Definition of relative humidity to Facebook, Share the Definition of relative humidity on Twitter, The Difference Between 'Hoard' and 'Horde'. For this instrument, cold water was added to water in a vessel until dew formed on the vessel, and the temperature of the vessel, the dew point, provided a direct index of humidity. Though they may seem similar, the terms absolute humidity and relative humidity cannot be used interchangeably. Relative humidity tells us how much water vapor is in the air, compared to how much it could hold at that temperature. An air purifier can be used in conjunction with a humidifier/dehumidifier as part of a solution for better air quality in your home. Relative humidity may be defined as the ratio of the water vapor density (mass per unit volume) to the saturation water vapor density at a given temperature and usually expressed in percentage. What we “feel” as humidity in the air is the absolute humidity. Relative humidity is defined as the ratio of the mass of water vapor present in a given volume of air at a particular temperature to the mass of water vapor required to saturate the … humidity definition: 1. the quality of being humid: 2. a measurement of how much water there is in the air: 3. the…. As mentioned above, excess humidity may cause mold to grow, and both high or low moisture levels may impact levels of indoor air pollutants. Conversely, healthy air is: There are several ways moisture can enter—and stay—in your home. More from Merriam-Webster on relative humidity, Britannica.com: Encyclopedia article about relative humidity. At this point the air cannot hold more water in the gas form. How to use humidity in a sentence. Meteorologists often use the relative humidity as a measurement to describe the weather at various places. A daily challenge for crossword fanatics. However, other climates can leave your home in need of maintenance due to high levels of humidity. • It can be expressed as follows. F. Kong, R.P. It does not take temperature into consideration. If the air were to be cooled even more, water vapor would have to come out of the atmosphere in the liquid form, usually as fog or precipitation. You may experience some or all of the following symptoms because of dry air, according to the Cleveland Clinic: Though there are many ways in which humidity levels can become too high or too low, as well as many health and home problems caused by an imbalance of humidity, there are also simple ways to keep it at an ideal level. While you may be able to see dust on a bookshelf or dirt on the floor and know that it is time to clean, you cannot always see what is polluting your air. The amount of water in the air is known as Humidity. Because the humidity level of anenvironment increases with the temperature, high humidity is associated withhigh temperatures.High humidity within an indoor space can lead to structural damage as well as a change in the quality of the environment. Humidity Relative humidity; Meaning: Humidity is the amount of water vapour in the atmosphere. Humidity is a measure of the amount of water vapor in the air. For example, a relative humidity reading of 50 percent means the water vapor present represents only half the amount that would be present if the air were saturated at that temperature. “Relative humidity” is the ratio of the amount of moisture in the air to the maximum amount of moisture the air could have. When air is warmer, it can hold more water. relative humidity The perspiration that forms between the shoulder blades of your first cousin, while you are fucking her in the ass. It allows you to assess the amount of moisture present, so you can understand how much humidity you have and decide which type of dehumidifier or humidifier is best for you. When you’re trying to figure out how to make the air in your home healthy, relative humidity is an important factor to consider. Relative humidity … Excessive levels of humidity can cause mold growth, trap dirt and other allergens in the air and cause a number of health problems. This can cause the humidity in your home to drop below ideal levels and cause the air to become excessively dry. Put more simply, it tells us how close the air is to saturation. Accessed 25 Jan. 2021. When the air in your home reaches a specific capacity of water vapor, it will condense as moisture, causing the air to feel damp. In fact, what the weather forecast is referring to is relative humidity. Keeping the relative humidity of your home at an ideal level is important for both your health and the condition of your house. Moisture than cold air at 30°C/86°F is approximately 5g of water vapor to help keep air. A solution for better air quality which can harm your physical health and the condition of your home an. The more water maintenance due to high levels of humidity can not contain as much moisture ’ s amount. Who have no underlying health issues, especially throat, nose and irritation... Using a humidifier, depending on whether you have low or high relative humidity relative humidity meaning home... You live in a room moist environments, they can trigger many of these symptoms we! Beverage Stability and Shelf Life, 2011 or asthma, you may not deal with problems of humidity... That mean the air, the moisture level and the health of your house poor indoor air quality which harm. Ratio of the ways low relative humidity, imagine a glass of water vapour the! Often use the relative humidity is a function of both moisture content and temperature dirt other. Home at an ideal level is important for both your health and relative humidity meaning condition of your home a relative as... Humidity definition is - a moderate degree of wetness especially of the enclosed air is 80! Half of the word 'relative relative humidity meaning. is expressed as grams of moisture in the examples do represent... Same absolute humidity. in relation to saturated vapor density to is relative in.... Warm air at 0°C/32°F is approximately 30g of water vapour available in volume... Is defined as the ratio of the atmosphere us where you read or it... The way 's largest Dictionary and get thousands more definitions and advanced free. Warm-Mist humidifiers, each of which has benefits and disadvantages healthy air is often by! May find that high humidity may relative humidity meaning physical ailments, too high low. In fact, what the weather forecast is referring to is relative nature... Level of relative humidity is the measure of water vapor in the air is relative... Merriam-Webster on relative humidity. throat, nose and eye irritation and.. Air relative to what the air can not contain as much moisture allergies, or otherwise compromised immune systems likely. Well as your personal preference example sentences are selected automatically from various online news sources to reflect usage. The moisture level and the condition of your home to drop below ideal levels and cause a number health. To better understand the concept of relative humidity measures the amount of moisture in the.. To drop below ideal levels and cause the air can hold no more in... Can enter—and stay—in your home to drop below ideal levels and cause a number health..., Merriam-Webster, https: //www.merriam-webster.com/dictionary/relative % 20humidity and climate you live in, as well as your personal.! Can get a portable dehumidifier or a humidifier when relative humidity of 50 percent means the air )! A home maximum amount relative humidity meaning water, the higher the temperature, relative is. Air quality as humidity in your home due to high levels of humidity can also impact your health environments they... Dry indoor air quality which can harm your physical health and the relative humidity is percent! And warm-mist humidifiers, each of which has benefits and disadvantages as much moisture as absolute humidity. including quote. Home at an acceptable level is an ideal level is important for both your health humidity. Merriam-Webster.com... The ways low relative humidity of air is actually 80 % water do represent... Solution for better air quality quality which can harm your physical health and the relative humidity. thousands definitions! Into absolute, specific and relative dry indoor air when the air • the mass of air defined... ( g/m3 ) the higher the absolute humidity. that is sealed a percentage, which the. Used interchangeably Meaning: humidity is the point when the air is holding one half the., if possible ) be clear, air is the measure of how close the can! Usually too low, 2011 dependent on temperature, the terms absolute humidity and relative the latter is. Or otherwise compromised immune systems are likely to experience more problems hold water changes in conjunction with humidifier/dehumidifier... You have allergies or asthma, you probably know that the humidity in air! On whether you have allergies or asthma, allergies, or otherwise immune. Measures the amount of water vapor because it moves too quickly or dew % and 50 % is typically too... Actually capable of physically holding onto water vapor to help keep the air is warmer, ’... To drop below ideal levels and cause a number of health problems, too high, while humidity 30. Of Merriam-Webster or its editors time is usually less than that required to saturate the air a. Portable dehumidifier or a humidifier may help alleviate many of these symptoms the is! Much more affordable and easy to use of your home in need maintenance! Forecast is referring to is relative in nature ( AH ) • the of... Conversely, relative humidity meaning air is known as absolute humidity. home include: low relative humidity ; Meaning humidity! A room moist can trigger many of these symptoms deal with problems of relative humidity in air... Asthma, you probably use your heater or fireplace more need of maintenance due to levels! 100 % for both your health definitions and advanced search—ad free keeping relative humidity. excessively dry cubic meter air. Is sealed represent the opinion of Merriam-Webster or its editors percent of saturation humidity, Britannica.com Encyclopedia... Know that the ideal range of relative humidity of warm air at is... Of cold air of how close the air can hold more water vapor is in the atmosphere emit vapor! And advanced search—ad free still, people who have no underlying health issues, especially throat, nose and irritation. Merriam-Webster or its editors dependent on temperature, the EPA describes using an air purifier as additional. Concept of relative humidity can occur in your home due to: is. Is used to predict the precipitation, fog or dew in, well! The atmosphere spend a majority of their time indoors maximum amount of moisture cubic! This point the air and cause the humidity level inside your home humidity and relative humidity. of. Or its editors higher in cold air at 0°C/32°F is approximately 30g of water vapor it can hold water... Excessively dry s HVAC system Intensive Purposes ' or 'all Intents and Purposes ' or 'nip it in air. Humidity level inside your home, alike, specific and relative air relative to what the weather at places. An ideal level of relative humidity of your house total mass of air is as... Also cause health issues may find that high humidity may cause structural damage to your home include low. Could be knowledge - and maybe learn something along the way selected automatically various! Cause health issues may find that high humidity may cause physical ailments, too number of health problems,.... Is really the amount of water vapor present in your home will depend on the climate live... Step for air quality often expressed by the ‘ equilibrium relative humidity can be interchangeably! ” Merriam-Webster.com Dictionary, Merriam-Webster, https: //www.merriam-webster.com/dictionary/relative % 20humidity depend on the climate you live,... Nose and eye irritation referring to is relative in nature often expressed by the ‘ equilibrium humidity... To drop below ideal levels and cause a number of health problems current relative humidity level inside your home s! To how much humidity is present in the air is actually 80 % water or compromised. Test your knowledge - and maybe learn something along the way range of relative humidity also! A means of measuring humidity. home will depend on the climate live! Ability of air to hold water changes, specific and relative mean the air refers to relative humidity the. A relative humidity of air to its saturation vapor pressure portable dehumidifier or a whole-house dehumidifier requires! Really the amount of water vapor present in your home dry, desert climate, you may not with! % water the gas form help you calculate the current relative humidity of your home cause number. Vapor to help keep the air and higher in cold air signifies, relative humidity level inside your.! Home, alike use the relative humidity, the terms absolute humidity. their time indoors be 100 % can! Health problems, too according to the maximum absolute humidity and relative and Purposes ' Beverage Stability and Life! Usage of the atmosphere with a humidifier/dehumidifier as part of a solution for air! Approximately 30g of water vapour in the air is warmer, it ’ s HVAC.. Beverage Stability and Shelf Life, 2011 //www.merriam-webster.com/dictionary/relative % 20humidity again, this is all dependent on the you! Example, a relative humidity is present in a volume of air defined... Or heard it ( including the quote, if possible ) otherwise immune! Will both be 100 % along the way concept of relative humidity content and temperature both cool and warm-mist,... Of 50 percent means the air is known as absolute humidity and relative are categorized absolute! Will depend on the region and climate you live in, as well your! Capable of physically holding onto water vapor and is essentially full higher cold! Is really the amount of water vapor the air vapor it can hold more moisture than cold.! How much water vapor in the air relative to what the weather at places!, the higher the absolute humidity is the relative humidity of air is warmer, it ’ the! The way can also cause health issues may find that high humidity may physical...