Dehumidifier operating time will vary as well depending on room size and humidity however we suggest running the dehumidifier for approximately 6 – 12 hours at a time.
Is is better to run a dehumidifier during the day or at night? Experienced HVAC expert Doug Flader puts it simply. 'It honestly doesn't matter,' he says. 'Ideally, a dehumidifier should run automatically based on humidity levels, regardless of the time of day.
How Long Does It Take for a Dehumidifier to Dry Out a Room? The size of the room, the humidity level, and the extent of the water damage are some of the variables that affect how long a dehumidifier takes to dry out a room. A dehumidifier typically needs between 24 and 72 hours to completely dry out a room.
Should a Dehumidifier Run Constantly? No, your dehumidifier should not have to run constantly to regulate the air humidity. An optimal humidity level to shoot for is between 30 and 50 percent. Your dehumidifier should reach this in 8 to 12 hours.
An example dehumidifier that can extract up to 20 litres a day, with a wattage of 480W would use 0.48 kW every hour. This means that an hour's usage would cost just 12p. In comparison, an example dehumidifier that can extract up to 12 litres a day, with a wattage of 157W (0.157 kW), would cost just under 4p an hour.
As a general rule of thumb you may need to empty your dehumidifiers bucket at intervals ranging from once every two days to twice a day, depending on the conditions.
So, do dehumidifiers use a lot of energy? The average range of energy usage for a desiccant dehumidifier is quite low, usually between 240 to 480 watts.
Leaving your dehumidifier on all the time can result in dehumidifying too much, leading to a dry indoor environment.
We suggest a comfort setting between 45%-55% humidity. Even though your air conditioner removes moisture from the air, the areas around your air conditioning system can be a source of water build-up.
The lifetime of dehumidifiers usually ranges from five to 10 years. To maximize the lifetime, it's important to care for your dehumidifier. Be sure to regularly change the air filters, clean the condensing coils and exhaust grilles, and empty and clean the water bucket.
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.
It's best to place it somewhere central in the house, being sure to think about where your sources of moisture are. Moisture problems like damp and mould are typically likely to arise in the bathroom, where showers and baths create lots of steam. And so, it is best to position your dehumidifier on the landing.
Mold stays “dormant” in the air or on surfaces even when there's no excess moisture to help it grow. If the humidity in a room increases, mold will start growing in patches on walls, clothes, and more. So, to answer your question, dehumidifiers do NOT kill mold, but they do prevent it by reducing humidity.
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.
Once temperatures drop to around 65 degrees, it's best to turn the dehumidifier off. Doing so will help prevent moisture from freezing on the dehumidifier's coils, which could damage your unit.
Research shows that the ideal relative humidity for your home is between 40%-60%. However, to discourage the growth and spread of mold, levels should be kept below 50%.
Set the Right Humidity
To get your manually-controlled dehumidifier up and running, set its humidity level. 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.
This can be achieved by using a humidistat (or hygrometer). 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.
Where to Place Dehumidifier in Your House. You want to place your machine in an area where there is good air circulation so the unit can efficiently work. We do not recommend placing a dehumidifier directly against a wall or piece of furniture. Instead, put it at least six inches away from these vent-blocking surfaces.
A dehumidifier should collect a certain amount of water each day - generally, around 10-20 pints of water per 24-hour period. This should require you to empty most dehumidifiers daily or bi-daily when in operation.
Keeping the door open allows the dehumidifier to pull in air from other rooms, increasing the area it can dehumidify. This is especially useful if multiple rooms have humidity issues. However, this can also reduce the efficiency as the dehumidifier has to work harder to pull in and process more air.
Yet just looking at the average estimates, we can see a clear winner: a dehumidifier costs on average $0.03 and $0.16 per hour to run, while an AC unit will run you $0.06 and $0.88 on average per hour. So while you could find AC units that cost less than a dehumidifier, most AC units will cost much more.
Yes, if an average dehumidifier in an average location were to run continuously it would cost over $700 per year in electricity cost! In general, your dehumidifier will not run 24 hours per day all year long. Even if you assume the dehumidifier ran just 50% of the time, your annual cost would be $363.