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RH= Relative humidity,

to put it simply is “the percentage of water in the air, compared with the maximum possible amount of water present in the air at the current temperature”. 100 % RH = water vapour. 


When a CB12 dehumidifier is rated at  @30degC 80%RH it can take out up to 12L/day, if the climate changes to 15 degC and 80%RH over winter the same CB12 may take out only 4-5 L/day. With high condensation in closed homes and apartments it pays to buy a larger model say CB20 or CB 30 that will remove more moisture in cooler temperatures during winter.

Dewpoint =

When air of a certain temperature and relative humidity is cooled the relative humidity increases because warm air can contain more water vapour than cold air. If one has a surface that is cold the water vapour will condense on the surface at a certain temperature. The temperature at surface condensation is called the air’s dew point. Dew means that water vapour from the air condenses on surfaces, such as car roofs and the outside of bottles containing cold liquids because the surface temperature is below the dewpoint.

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