What is Dehumidifier: Definition and 11 Discussions

A dehumidifier is an electrical appliance which reduces and maintains the level of humidity in the air, usually for health or comfort reasons, or to eliminate musty odor and to prevent the growth of mildew by extracting water from the air. It can be used for household, commercial, or industrial applications. Large dehumidifiers are used in commercial buildings such as indoor ice rinks and swimming pools, as well as manufacturing plants or storage warehouses.

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  1. T

    Calcium Chloride based dessicant

    Hello everyone. I would like to experiment with solar air conditioning, wich may work as a massive dehumidifier. I have the idea of making a suspension/solution of Calcium Chloride and / or some sort of Lithium dessicant salt in some sort of oil, run between a solar boiler to evaporate water,on...
  2. addorian85

    Dehumidifier and open window

    Hello, I have a dehumidifier and I keep it in the bathroom (small bathroom), where I can dry my clothes. It has a fast dehumidifying feature for drying clothes and it's working very well in my opinion. I was always bad at physics but I have read on the internet, in the manual that I should keep...
  3. kyphysics

    My Dehumidifier Hygrometer Differs From Handheld by 10% on RH....OK?

    The relative humidity readings are: 49% dehu 39% handheld That's when they are placed side-by-side in the same area. Could both be roughly accurate with a small margin of error or could one (or both) just be wildly off?
  4. R

    Placing Dehumidifier in Cold/Warm Space for Optimal Condensate Flow

    Hi. I purchased a dehumidifier in order to prevent condensation on aluminum windows in one area of my home. My home is comprised of two spaces: a warm space (20-22°C) and a cold space (<16°C). The door separating these spaces must remain slightly open for several hours of the day/night, so they...
  5. Y

    I A question about dehumidifiers and condensation

    Hi guys! My question is about the heat sinks (cold side) used in some dehumidifiers. It appears that thick, well spaced fins are used, as opposed to a larger number of thin fins, which I would expect to provide better heat transfer. Am I right in assuming that this is to allow space for...
  6. SlowThinker

    B Maximum efficiency of a dehumidifier

    There's a youtube channel where someone nicknamed Thunderf00t is making fun of a water source that is supposed to be a wind-powered dehumidifier. He makes some arguments that don't look entirely valid. He argues that the energy needed is the evaporation heat of water, or some 2000 kJ/kg. In...
  7. S

    Dehumidifier compressor

    I'm working on a project to design Atmospheric Water Generator, to generate 3 litres of water per day. and I'm using the same concept as dehumidifier. My problem is I want to figure out how powerful my compressor should be. I need to calculate that, given a heat flow rate of 352.91 kJ/hour...
  8. M

    Dehumidifier from a walk-in freezer unit?

    I have 2 each 1-1/2 ton refrigeration units for a walk-in freezer. I would like to build a dehumidifation kiln to dry lumber. Each unit would freeze an 8' x 10' freezer to -20 degrees. How hard would it be to use a freezer compressor and condensor as a dehumidifier? How would it work...
  9. C

    Develop a Headlight Dehumidifier for Car Dealerships

    Ok, we have all seen it... a build up of condensation inside a car's headlight. I have been looking around and there is not a dehumidifier built specifically to remove this nuisance. I am in the business of restoring automobiles for car dealerships and i think that this would be a great add on...
  10. E

    Dehumidifier and condensation?

    I did some research on how dehumidifiers work and from what've been able to find out, it takes in room-temperature air, cools it, thus condensation, then runs it back through heated coils so bring the air back to room temperature. I got around to taking apart an actual dehumidifier it's...
  11. Mk

    How can I build a dehumidifier?

    I would like to build a dehumidifier. I don't even know where to start. I read that refridgerative coils are use in mechanical dehumidifiers. How should I go about doing this, or is it inviable?