If your home feels sticky and you've noticed stains on your walls, condensation on your window or walls, or are concerned with mold and bacteria growth, you should consider using a dehumidifier. If your relative humidity level is above 50%, you likely need a dehumidifier.
Dehumidifiers are not very effective in extremely low temperatures. This is because dehumidifier coils attract water vapor, and if the temperatures drop too low — below 42 degrees Fahrenheit for example — the vapor would freeze, damaging your machine.
Pop two to three cubes of ice in a glass with water. Leave for four to five minutes. Check the results – if the glass is dripping with condensation that's an indicator that humidity levels are high. However, if there's no condensation at all, that indicates the air is too dry.
Here's how to see the temperature or humidity in your home — this works when you are away from home, too. Open the Home app on your iPhone, iPad, or Mac. Tap Climate in the top shortcuts row. Tap Temperature or Humidity in the next shortcuts row.
Symptoms may include sneezing, nasal congestion, itching, watery eyes, and respiratory discomfort. For individuals with pre-existing allergies or asthma, exposure to high humidity and the associated allergens can exacerbate their conditions.
An air conditioner will reduce the humidity AND lower the temperature significantly. So, dehumidifiers are best used in situations where moisture ( humidity ) is a problem but where significant cooling is not required.
Mold needs 55% or higher humidity in order to grow. Also, remember that reducing humidity below 30% isn't a good idea, either. This can cause health problems, making your eyes nose and skin dry, and exasperate lung and skin conditions.
If you find your home seems to be aglow with static, this is a sign you need a humidifier. Dry air contributes to static in the home leading to little shocks between family members, especially when walking on carpet. However, it also makes your hair static, your bed linens static and your clothes as well.
So, can you use tap water in a humidifier? While you technically can; it's not recommended. Instead, look for demineralized, distilled, and purified water at the store. This kind of water is less likely to result in mold and bacteria growth inside your humidifier.
Humidifiers are basically used to add moisture to the air when it is dry. People usually use humidifiers during the winter to combat the dry air. On the other hand, dehumidifiers are devices used to take out moisture in the air.
Cons of Dehumidifiers
Dehumidifiers collect water meaning they need to be regularly emptied. They also need to be regularly cleaned otherwise black mould can start to grow on the machine , which can induce a wide range of health problems including allergic reactions, lung problems and irritation.
Place two or three ice cubes into a glass, add water and stir. Wait three to four minutes. If moisture does not form on the outside of the glass, the air is too dry; you may need a humidifier. If water has condensed on the outside of the glass, the level of relative humidity is high.
The temperature in your home
Keep doors of unheated rooms open to allow some heat into them. Ideally your home should be heated between 18 to 21 degrees Celsius, but older people, babies and people who are less mobile may need it to be warmer.
You want it set at 30 – 50%. If there's too much moisture, you'll get dampness and mould. If there's too little moisture, your home will be too dry and attract bacteria. When your dehumidifier sucks in the moisture-filled air, it turns it into condensation and stores it in a container.
Firstly, it's worth noting that the most effective place to position a dehumidifier is in the centre of a room. This allows the air to circulate properly around the unit. The only time when this positioning can be disregarded is if the unit has a top-mounted air discharge.
Some versions provide the option of draining into a sink or out a window so that you don't have to worry about the collection tank filling up. A dehumidifier and an air conditioner can be used simultaneously.
One way to measure humidity is with a hygrometer. Hygrometers are available at most hardware stores, and they're relatively simple to use. Just place the device in an area of your home that you'd like to measure, and wait for the reading to stabilize.
Damp spots could appear in many places—on the floor, walls, or ceilings. Maybe it's a wet spot on the carpet. Or a water stain that has caused discoloration on your wood floor. These stains can also show up on ceilings and walls—something particularly common with leaks from upstairs bathrooms or damaged roofs.
When the relative humidity of the air is high, it makes the air temperature feel much hotter than it is. Your thermometer may read 88° F on a hot summer day, but if the relative humidity is 75 percent, it will feel like a sizzling 103° F.
Bacteria and viruses take hold in humid conditions
Spending time in an environment with too much humidity can actually make you sick, especially from respiratory infections. The bacteria and viruses that cause illness thrive and grow in air that's above 60 percent relative humidity.