Which features do I need in a dehumidifier?
Ability to adjust relative humidity
Dehumidifiers come with a humidistat, which allows you to set the relative humidity (RH) for the room. Ideal RH for human comfort is around 40 per cent. Anything lower than 40 per cent can make the air too dry, causing dry skin, eyes and nasal passages, while anything over 50 per cent can cause bacterial growth like mould. That’s why dehumidifiers with precise RH number settings are best: you can set the RH safely and comfortably in the 40s.
Water collection and drainage
Review the dehumidifier's water collection and drainage features. If you intend to run your dehumidifier all day in the same location, an adaptor hose will pour the water straight down a drain and save you from emptying the water collection tank every few hours. If you want to move the dehumidifier around, the tank should be easily removable and hold at least 4L of water before needing to be emptied.
Air filters and UV light filters
Some dehumidifiers come with air filters to trap dust and/or UV light filters that eliminate airborne bacteria. This is especially helpful if anyone in your home suffers from asthma, allergies or other respiratory problems.
Make sure that the dehumidifier's decibel level won’t interfere with daily activities like talking on the phone, working from home, watching television or playing an instrument.
Suitability and effectiveness for your home or room
You should also consider how effective the dehumidifier will be in your typical household conditions. Product listings will often highlight the dehumidifier’s performance in ideal conditions. Many dehumidifiers’ performance worsens as the temperature gets lower.
Finally, look at your dehumidifier’s portability. If it’s too large to comfortably carry, it should come with wheels and handles for safe moving around the home.