4 ms·

I think there are two ways to deal with getting moisture out of the air: 1. desiccants 2. cooling it down past saturation

• crazygringo 3y ago
  Desiccants aren't nearly effective enough to dehumidify something like a room. [EDIT: apparently desiccant dehumidifiers are a thing too, although much less common in the home consumer world, so never mind -- disregard this whole comment!] The answer is #2. Air conditioning units and dehumidifier units, which are essentially the exact same thing except for where the hot air output goes. (AC's send the hot air outdoors; dehumidifiers mix it back with the now-dehumidified cold air.)
  • klysm 3y ago
    > Desiccants aren't nearly effective enough to dehumidify something like a room. I'm not sure this is true. There's some nasty desiccants that can work effectively, but the trouble is usually in regeneration.
  • jjeaff 3y ago
    ACs don't send the hot air outside. They transfer the heat outside. They usually recirculate the inside air. But the act of running the inside air across the cooling coils causes water to condenser on the coils and thus dehumidifies the air as well.
    • pcthrowaway 3y ago
      If portable A/C units aren't sending the internal air outside, does that mean they're also just circulating outside air as a way to disperse the heat, rather than actually blowing air outside?
      • CapstanRoller 3y ago
        Some portable A/C units do send hot air outside, and some don't. The two-hose models AFAIK are the latter type (although the un-insulated hoses are wildly inefficient) https://youtu.be/_-mBeYC2KGc https://youtu.be/_-mBeYC2KGc
• charles_f 3y ago
  And compression